./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/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_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/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_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/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 c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --- 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 11:54:34,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:54:34,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:54:34,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:54:34,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:54:34,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:54:34,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:54:34,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:54:34,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:54:34,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:54:34,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:54:34,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:54:34,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:54:34,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:54:34,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:54:34,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:54:34,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:54:34,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:54:34,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:54:34,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:54:34,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:54:34,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:54:34,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:54:34,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:54:34,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:54:34,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:54:34,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:54:34,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:54:34,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:54:34,488 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:54:34,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:54:34,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:54:34,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:54:34,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:54:34,491 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:54:34,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:54:34,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:54:34,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:54:34,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:54:34,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:54:34,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:54:34,495 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 11:54:34,514 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:54:34,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:54:34,515 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:54:34,515 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:54:34,516 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:54:34,516 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:54:34,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:54:34,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:54:34,517 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:54:34,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:54:34,517 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:54:34,517 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:54:34,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:54:34,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:54:34,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:54:34,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 11:54:34,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:54:34,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 11:54:34,518 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 11:54:34,518 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:54:34,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 11:54:34,519 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:54:34,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 11:54:34,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:54:34,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:54:34,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:54:34,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:54:34,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:54:34,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:54:34,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 11:54:34,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:54:34,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:54:34,521 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:54:34,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 11:54:34,521 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:54:34,521 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:54:34,521 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:54:34,521 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_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e [2022-12-13 11:54:34,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:54:34,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:54:34,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:54:34,751 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:54:34,751 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:54:34,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-12-13 11:54:37,280 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:54:37,429 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:54:37,429 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-12-13 11:54:37,435 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/data/d6e349b2a/291da9234b2440bdb1f215c0bdbfd411/FLAGe5906ba88 [2022-12-13 11:54:37,854 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/data/d6e349b2a/291da9234b2440bdb1f215c0bdbfd411 [2022-12-13 11:54:37,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:54:37,857 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:54:37,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:54:37,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:54:37,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:54:37,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:54:37" (1/1) ... [2022-12-13 11:54:37,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e80a89a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:54:37, skipping insertion in model container [2022-12-13 11:54:37,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:54:37" (1/1) ... [2022-12-13 11:54:37,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:54:37,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:54:37,981 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:54:37,982 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:54:37,982 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:54:37,983 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:54:37,985 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:54:37,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:54:37,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:54:37,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:54:37,990 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_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-12-13 11:54:37,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:54:38,003 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:54:38,012 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:54:38,013 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:54:38,013 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:54:38,013 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:54:38,014 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:54:38,015 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:54:38,015 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:54:38,015 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:54:38,017 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_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-12-13 11:54:38,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:54:38,031 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:54:38,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:54:38 WrapperNode [2022-12-13 11:54:38,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:54:38,032 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:54:38,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:54:38,032 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:54:38,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:54:38" (1/1) ... [2022-12-13 11:54:38,043 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:54:38" (1/1) ... [2022-12-13 11:54:38,059 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 178 [2022-12-13 11:54:38,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:54:38,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:54:38,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:54:38,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:54:38,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:54:38" (1/1) ... [2022-12-13 11:54:38,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:54:38" (1/1) ... [2022-12-13 11:54:38,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:54:38" (1/1) ... [2022-12-13 11:54:38,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:54:38" (1/1) ... [2022-12-13 11:54:38,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:54:38" (1/1) ... [2022-12-13 11:54:38,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:54:38" (1/1) ... [2022-12-13 11:54:38,076 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:54:38" (1/1) ... [2022-12-13 11:54:38,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:54:38" (1/1) ... [2022-12-13 11:54:38,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:54:38,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:54:38,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:54:38,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:54:38,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:54:38" (1/1) ... [2022-12-13 11:54:38,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:54:38,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:54:38,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:54:38,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:54:38,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:54:38,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:54:38,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:54:38,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 11:54:38,136 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 11:54:38,136 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 11:54:38,137 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 11:54:38,137 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 11:54:38,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:54:38,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 11:54:38,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 11:54:38,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 11:54:38,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:54:38,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:54:38,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:54:38,139 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 11:54:38,217 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:54:38,218 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:54:38,480 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:54:38,613 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:54:38,613 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 11:54:38,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:54:38 BoogieIcfgContainer [2022-12-13 11:54:38,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:54:38,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:54:38,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:54:38,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:54:38,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:54:37" (1/3) ... [2022-12-13 11:54:38,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0216b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:54:38, skipping insertion in model container [2022-12-13 11:54:38,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:54:38" (2/3) ... [2022-12-13 11:54:38,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0216b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:54:38, skipping insertion in model container [2022-12-13 11:54:38,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:54:38" (3/3) ... [2022-12-13 11:54:38,621 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2022-12-13 11:54:38,627 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 11:54:38,634 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:54:38,634 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-12-13 11:54:38,634 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:54:38,712 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 11:54:38,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 142 transitions, 300 flow [2022-12-13 11:54:38,785 INFO L130 PetriNetUnfolder]: 9/140 cut-off events. [2022-12-13 11:54:38,785 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:54:38,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 140 events. 9/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 182 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 95. Up to 2 conditions per place. [2022-12-13 11:54:38,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 142 transitions, 300 flow [2022-12-13 11:54:38,793 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 121 transitions, 251 flow [2022-12-13 11:54:38,796 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:54:38,804 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 121 transitions, 251 flow [2022-12-13 11:54:38,806 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 121 transitions, 251 flow [2022-12-13 11:54:38,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 121 transitions, 251 flow [2022-12-13 11:54:38,830 INFO L130 PetriNetUnfolder]: 8/121 cut-off events. [2022-12-13 11:54:38,830 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:54:38,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 121 events. 8/121 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 184 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 95. Up to 2 conditions per place. [2022-12-13 11:54:38,832 INFO L119 LiptonReduction]: Number of co-enabled transitions 1512 [2022-12-13 11:54:44,317 INFO L134 LiptonReduction]: Checked pairs total: 2896 [2022-12-13 11:54:44,317 INFO L136 LiptonReduction]: Total number of compositions: 122 [2022-12-13 11:54:44,327 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:54:44,331 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;@63dafaac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:54:44,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2022-12-13 11:54:44,333 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 11:54:44,333 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:54:44,333 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:54:44,334 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:54:44,334 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:54:44,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:44,338 INFO L85 PathProgramCache]: Analyzing trace with hash 24393, now seen corresponding path program 1 times [2022-12-13 11:54:44,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:44,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514723653] [2022-12-13 11:54:44,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:44,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:44,512 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 11:54:44,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:44,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514723653] [2022-12-13 11:54:44,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514723653] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:54:44,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:54:44,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:54:44,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777038642] [2022-12-13 11:54:44,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:54:44,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:54:44,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:44,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:54:44,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:54:44,550 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 264 [2022-12-13 11:54:44,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:44,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:54:44,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 264 [2022-12-13 11:54:44,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:54:44,761 INFO L130 PetriNetUnfolder]: 1009/1495 cut-off events. [2022-12-13 11:54:44,761 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-12-13 11:54:44,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3042 conditions, 1495 events. 1009/1495 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 7841 event pairs, 560 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 1398. Up to 742 conditions per place. [2022-12-13 11:54:44,768 INFO L137 encePairwiseOnDemand]: 256/264 looper letters, 53 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2022-12-13 11:54:44,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 242 flow [2022-12-13 11:54:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:54:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:54:44,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2022-12-13 11:54:44,779 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2022-12-13 11:54:44,779 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2022-12-13 11:54:44,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2022-12-13 11:54:44,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:54:44,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2022-12-13 11:54:44,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:44,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:44,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:44,794 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 79 flow. Second operand 3 states and 407 transitions. [2022-12-13 11:54:44,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 242 flow [2022-12-13 11:54:44,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 57 transitions, 232 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:54:44,801 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 80 flow [2022-12-13 11:54:44,802 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2022-12-13 11:54:44,806 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2022-12-13 11:54:44,806 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 80 flow [2022-12-13 11:54:44,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:44,807 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:54:44,807 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:54:44,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:54:44,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:54:44,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:44,808 INFO L85 PathProgramCache]: Analyzing trace with hash 757435, now seen corresponding path program 1 times [2022-12-13 11:54:44,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:44,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168742397] [2022-12-13 11:54:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:44,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:44,877 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 11:54:44,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:44,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168742397] [2022-12-13 11:54:44,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168742397] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:54:44,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44257573] [2022-12-13 11:54:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:44,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:44,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:54:44,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:54:44,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:54:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:44,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 11:54:44,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:54:44,971 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 11:54:44,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:54:44,984 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 11:54:44,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44257573] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:54:44,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:54:44,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 11:54:44,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507359998] [2022-12-13 11:54:44,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:54:44,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 11:54:44,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:44,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 11:54:44,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:54:45,010 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 264 [2022-12-13 11:54:45,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 80 flow. Second operand has 7 states, 7 states have (on average 115.14285714285714) internal successors, (806), 7 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:45,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:54:45,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 264 [2022-12-13 11:54:45,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:54:45,523 INFO L130 PetriNetUnfolder]: 2524/3736 cut-off events. [2022-12-13 11:54:45,523 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-13 11:54:45,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7553 conditions, 3736 events. 2524/3736 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 22448 event pairs, 1400 based on Foata normal form. 0/1325 useless extension candidates. Maximal degree in co-relation 6039. Up to 741 conditions per place. [2022-12-13 11:54:45,537 INFO L137 encePairwiseOnDemand]: 260/264 looper letters, 127 selfloop transitions, 9 changer transitions 0/138 dead transitions. [2022-12-13 11:54:45,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 138 transitions, 592 flow [2022-12-13 11:54:45,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:54:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:54:45,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 937 transitions. [2022-12-13 11:54:45,540 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5070346320346321 [2022-12-13 11:54:45,540 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 937 transitions. [2022-12-13 11:54:45,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 937 transitions. [2022-12-13 11:54:45,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:54:45,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 937 transitions. [2022-12-13 11:54:45,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 133.85714285714286) internal successors, (937), 7 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:45,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 264.0) internal successors, (2112), 8 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:45,546 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 264.0) internal successors, (2112), 8 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:45,546 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 80 flow. Second operand 7 states and 937 transitions. [2022-12-13 11:54:45,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 138 transitions, 592 flow [2022-12-13 11:54:45,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 138 transitions, 590 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:54:45,548 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 137 flow [2022-12-13 11:54:45,548 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=137, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2022-12-13 11:54:45,548 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2022-12-13 11:54:45,548 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 137 flow [2022-12-13 11:54:45,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 115.14285714285714) internal successors, (806), 7 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:45,549 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:54:45,549 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2022-12-13 11:54:45,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:54:45,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:45,750 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:54:45,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:45,751 INFO L85 PathProgramCache]: Analyzing trace with hash 23481225, now seen corresponding path program 1 times [2022-12-13 11:54:45,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:45,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241322563] [2022-12-13 11:54:45,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:45,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:45,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:54:45,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:45,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241322563] [2022-12-13 11:54:45,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241322563] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:54:45,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:54:45,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:54:45,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010342855] [2022-12-13 11:54:45,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:54:45,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:54:45,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:45,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:54:45,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:54:45,850 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 264 [2022-12-13 11:54:45,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:45,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:54:45,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 264 [2022-12-13 11:54:45,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:54:46,176 INFO L130 PetriNetUnfolder]: 2521/3732 cut-off events. [2022-12-13 11:54:46,176 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 11:54:46,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7555 conditions, 3732 events. 2521/3732 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 22469 event pairs, 1400 based on Foata normal form. 2/1324 useless extension candidates. Maximal degree in co-relation 4523. Up to 3692 conditions per place. [2022-12-13 11:54:46,191 INFO L137 encePairwiseOnDemand]: 262/264 looper letters, 31 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2022-12-13 11:54:46,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 174 flow [2022-12-13 11:54:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:54:46,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:54:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2022-12-13 11:54:46,193 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4684343434343434 [2022-12-13 11:54:46,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2022-12-13 11:54:46,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2022-12-13 11:54:46,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:54:46,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2022-12-13 11:54:46,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:46,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:46,196 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:46,196 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 137 flow. Second operand 3 states and 371 transitions. [2022-12-13 11:54:46,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 174 flow [2022-12-13 11:54:46,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 34 transitions, 166 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 11:54:46,198 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 104 flow [2022-12-13 11:54:46,198 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2022-12-13 11:54:46,199 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2022-12-13 11:54:46,199 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 104 flow [2022-12-13 11:54:46,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:46,200 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:54:46,200 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:54:46,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 11:54:46,200 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:54:46,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:46,201 INFO L85 PathProgramCache]: Analyzing trace with hash 727712307, now seen corresponding path program 1 times [2022-12-13 11:54:46,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:46,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305157868] [2022-12-13 11:54:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:46,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:46,276 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 11:54:46,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:46,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305157868] [2022-12-13 11:54:46,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305157868] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:54:46,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:54:46,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:54:46,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955435251] [2022-12-13 11:54:46,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:54:46,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:54:46,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:46,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:54:46,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:54:46,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 264 [2022-12-13 11:54:46,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:46,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:54:46,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 264 [2022-12-13 11:54:46,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:54:46,757 INFO L130 PetriNetUnfolder]: 3346/4917 cut-off events. [2022-12-13 11:54:46,757 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 11:54:46,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9973 conditions, 4917 events. 3346/4917 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 29554 event pairs, 460 based on Foata normal form. 0/1822 useless extension candidates. Maximal degree in co-relation 9961. Up to 4166 conditions per place. [2022-12-13 11:54:46,778 INFO L137 encePairwiseOnDemand]: 253/264 looper letters, 44 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2022-12-13 11:54:46,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 247 flow [2022-12-13 11:54:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:54:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:54:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2022-12-13 11:54:46,780 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4962121212121212 [2022-12-13 11:54:46,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2022-12-13 11:54:46,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2022-12-13 11:54:46,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:54:46,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2022-12-13 11:54:46,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:46,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:46,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:46,783 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 104 flow. Second operand 3 states and 393 transitions. [2022-12-13 11:54:46,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 247 flow [2022-12-13 11:54:46,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 53 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:54:46,784 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 156 flow [2022-12-13 11:54:46,785 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2022-12-13 11:54:46,785 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2022-12-13 11:54:46,785 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 156 flow [2022-12-13 11:54:46,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:46,786 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:54:46,786 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:54:46,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 11:54:46,786 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:54:46,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:46,786 INFO L85 PathProgramCache]: Analyzing trace with hash 727712305, now seen corresponding path program 1 times [2022-12-13 11:54:46,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:46,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144784828] [2022-12-13 11:54:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:46,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:46,854 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 11:54:46,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:46,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144784828] [2022-12-13 11:54:46,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144784828] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:54:46,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:54:46,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:54:46,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708909740] [2022-12-13 11:54:46,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:54:46,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:54:46,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:46,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:54:46,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:54:46,894 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 264 [2022-12-13 11:54:46,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 109.0) internal successors, (545), 5 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 11:54:46,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:54:46,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 264 [2022-12-13 11:54:46,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:54:47,343 INFO L130 PetriNetUnfolder]: 2548/3958 cut-off events. [2022-12-13 11:54:47,343 INFO L131 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2022-12-13 11:54:47,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9816 conditions, 3958 events. 2548/3958 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 24758 event pairs, 1405 based on Foata normal form. 18/1992 useless extension candidates. Maximal degree in co-relation 9802. Up to 3683 conditions per place. [2022-12-13 11:54:47,361 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 69 selfloop transitions, 4 changer transitions 2/76 dead transitions. [2022-12-13 11:54:47,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 76 transitions, 422 flow [2022-12-13 11:54:47,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:54:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:54:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 605 transitions. [2022-12-13 11:54:47,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2022-12-13 11:54:47,364 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 605 transitions. [2022-12-13 11:54:47,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 605 transitions. [2022-12-13 11:54:47,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:54:47,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 605 transitions. [2022-12-13 11:54:47,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:47,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:47,369 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:47,369 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 156 flow. Second operand 5 states and 605 transitions. [2022-12-13 11:54:47,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 76 transitions, 422 flow [2022-12-13 11:54:47,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 76 transitions, 409 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:54:47,373 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 181 flow [2022-12-13 11:54:47,373 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2022-12-13 11:54:47,374 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 11 predicate places. [2022-12-13 11:54:47,374 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 181 flow [2022-12-13 11:54:47,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.0) internal successors, (545), 5 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 11:54:47,374 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:54:47,374 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 11:54:47,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 11:54:47,375 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:54:47,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:47,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1090660313, now seen corresponding path program 2 times [2022-12-13 11:54:47,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:47,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437045995] [2022-12-13 11:54:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:47,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:47,449 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 11:54:47,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:47,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437045995] [2022-12-13 11:54:47,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437045995] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:54:47,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917915526] [2022-12-13 11:54:47,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:54:47,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:47,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:54:47,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:54:47,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:54:47,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 11:54:47,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:54:47,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:54:47,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:54:47,522 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 11:54:47,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:54:47,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917915526] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:54:47,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:54:47,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-12-13 11:54:47,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850039511] [2022-12-13 11:54:47,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:54:47,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:54:47,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:47,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:54:47,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:54:47,533 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 264 [2022-12-13 11:54:47,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:47,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:54:47,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 264 [2022-12-13 11:54:47,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:54:48,046 INFO L130 PetriNetUnfolder]: 2776/4125 cut-off events. [2022-12-13 11:54:48,046 INFO L131 PetriNetUnfolder]: For 545/591 co-relation queries the response was YES. [2022-12-13 11:54:48,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10848 conditions, 4125 events. 2776/4125 cut-off events. For 545/591 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 24671 event pairs, 1389 based on Foata normal form. 47/2161 useless extension candidates. Maximal degree in co-relation 10830. Up to 4098 conditions per place. [2022-12-13 11:54:48,067 INFO L137 encePairwiseOnDemand]: 262/264 looper letters, 37 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2022-12-13 11:54:48,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 41 transitions, 247 flow [2022-12-13 11:54:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:54:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:54:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 373 transitions. [2022-12-13 11:54:48,069 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47095959595959597 [2022-12-13 11:54:48,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 373 transitions. [2022-12-13 11:54:48,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 373 transitions. [2022-12-13 11:54:48,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:54:48,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 373 transitions. [2022-12-13 11:54:48,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:48,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:48,073 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:48,073 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 181 flow. Second operand 3 states and 373 transitions. [2022-12-13 11:54:48,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 41 transitions, 247 flow [2022-12-13 11:54:48,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 231 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-12-13 11:54:48,078 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 157 flow [2022-12-13 11:54:48,078 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2022-12-13 11:54:48,079 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 6 predicate places. [2022-12-13 11:54:48,079 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 157 flow [2022-12-13 11:54:48,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:48,080 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:54:48,080 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:54:48,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 11:54:48,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 11:54:48,281 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:54:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:48,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1090453391, now seen corresponding path program 1 times [2022-12-13 11:54:48,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:48,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596783982] [2022-12-13 11:54:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:48,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:48,555 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 11:54:48,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:48,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596783982] [2022-12-13 11:54:48,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596783982] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:54:48,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123649288] [2022-12-13 11:54:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:48,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:48,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:54:48,557 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:54:48,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:54:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:48,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 11:54:48,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:54:48,663 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 11 treesize of output 7 [2022-12-13 11:54:48,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:54:48,693 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 14 treesize of output 16 [2022-12-13 11:54:48,713 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 11:54:48,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:54:48,744 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_141 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_141) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967296)) is different from false [2022-12-13 11:54:48,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:48,759 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 22 treesize of output 23 [2022-12-13 11:54:48,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:48,768 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 33 treesize of output 31 [2022-12-13 11:54:48,788 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 5 treesize of output 3 [2022-12-13 11:54:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 11:54:48,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123649288] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:54:48,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:54:48,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-12-13 11:54:48,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484413428] [2022-12-13 11:54:48,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:54:48,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:54:48,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:48,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:54:48,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2022-12-13 11:54:48,830 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 264 [2022-12-13 11:54:48,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 157 flow. Second operand has 12 states, 12 states have (on average 92.25) internal successors, (1107), 12 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:48,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:54:48,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 264 [2022-12-13 11:54:48,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:54:49,394 INFO L130 PetriNetUnfolder]: 3288/5290 cut-off events. [2022-12-13 11:54:49,394 INFO L131 PetriNetUnfolder]: For 799/799 co-relation queries the response was YES. [2022-12-13 11:54:49,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13616 conditions, 5290 events. 3288/5290 cut-off events. For 799/799 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 36629 event pairs, 1043 based on Foata normal form. 0/2757 useless extension candidates. Maximal degree in co-relation 13602. Up to 3113 conditions per place. [2022-12-13 11:54:49,415 INFO L137 encePairwiseOnDemand]: 251/264 looper letters, 75 selfloop transitions, 19 changer transitions 1/96 dead transitions. [2022-12-13 11:54:49,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 96 transitions, 535 flow [2022-12-13 11:54:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:54:49,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:54:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 808 transitions. [2022-12-13 11:54:49,418 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38257575757575757 [2022-12-13 11:54:49,418 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 808 transitions. [2022-12-13 11:54:49,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 808 transitions. [2022-12-13 11:54:49,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:54:49,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 808 transitions. [2022-12-13 11:54:49,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 101.0) internal successors, (808), 8 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:49,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 264.0) internal successors, (2376), 9 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:49,424 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 264.0) internal successors, (2376), 9 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:49,424 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 157 flow. Second operand 8 states and 808 transitions. [2022-12-13 11:54:49,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 96 transitions, 535 flow [2022-12-13 11:54:49,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 96 transitions, 534 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:54:49,428 INFO L231 Difference]: Finished difference. Result has 53 places, 55 transitions, 278 flow [2022-12-13 11:54:49,428 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=278, PETRI_PLACES=53, PETRI_TRANSITIONS=55} [2022-12-13 11:54:49,428 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 14 predicate places. [2022-12-13 11:54:49,429 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 278 flow [2022-12-13 11:54:49,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 92.25) internal successors, (1107), 12 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:49,429 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:54:49,429 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:54:49,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 11:54:49,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:49,630 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:54:49,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:49,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1090453390, now seen corresponding path program 1 times [2022-12-13 11:54:49,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:49,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687621621] [2022-12-13 11:54:49,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:49,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:49,858 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 11:54:49,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:49,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687621621] [2022-12-13 11:54:49,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687621621] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:54:49,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476361098] [2022-12-13 11:54:49,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:49,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:49,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:54:49,860 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:54:49,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:54:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:49,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 11:54:49,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:54:49,954 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 11 treesize of output 7 [2022-12-13 11:54:49,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:54:49,980 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 16 treesize of output 18 [2022-12-13 11:54:50,000 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 11:54:50,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:54:50,051 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:50,052 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 24 treesize of output 25 [2022-12-13 11:54:50,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:50,058 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 39 treesize of output 37 [2022-12-13 11:54:50,062 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 7 treesize of output 5 [2022-12-13 11:54:50,081 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 11:54:50,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476361098] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:54:50,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:54:50,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-12-13 11:54:50,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824305154] [2022-12-13 11:54:50,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:54:50,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:54:50,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:50,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:54:50,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=99, Unknown=2, NotChecked=0, Total=132 [2022-12-13 11:54:50,258 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 264 [2022-12-13 11:54:50,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 278 flow. Second operand has 12 states, 12 states have (on average 104.25) internal successors, (1251), 12 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:50,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:54:50,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 264 [2022-12-13 11:54:50,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:54:50,874 INFO L130 PetriNetUnfolder]: 3324/5358 cut-off events. [2022-12-13 11:54:50,875 INFO L131 PetriNetUnfolder]: For 2247/2247 co-relation queries the response was YES. [2022-12-13 11:54:50,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15011 conditions, 5358 events. 3324/5358 cut-off events. For 2247/2247 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 37335 event pairs, 1055 based on Foata normal form. 0/3181 useless extension candidates. Maximal degree in co-relation 14994. Up to 3185 conditions per place. [2022-12-13 11:54:50,893 INFO L137 encePairwiseOnDemand]: 253/264 looper letters, 74 selfloop transitions, 21 changer transitions 1/97 dead transitions. [2022-12-13 11:54:50,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 97 transitions, 613 flow [2022-12-13 11:54:50,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:54:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:54:50,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 901 transitions. [2022-12-13 11:54:50,898 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4266098484848485 [2022-12-13 11:54:50,898 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 901 transitions. [2022-12-13 11:54:50,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 901 transitions. [2022-12-13 11:54:50,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:54:50,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 901 transitions. [2022-12-13 11:54:50,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.625) internal successors, (901), 8 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:50,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 264.0) internal successors, (2376), 9 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:50,908 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 264.0) internal successors, (2376), 9 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:50,908 INFO L175 Difference]: Start difference. First operand has 53 places, 55 transitions, 278 flow. Second operand 8 states and 901 transitions. [2022-12-13 11:54:50,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 97 transitions, 613 flow [2022-12-13 11:54:50,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 97 transitions, 604 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 11:54:50,917 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 320 flow [2022-12-13 11:54:50,917 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=320, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2022-12-13 11:54:50,918 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 20 predicate places. [2022-12-13 11:54:50,918 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 320 flow [2022-12-13 11:54:50,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.25) internal successors, (1251), 12 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:50,919 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:54:50,919 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:54:50,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 11:54:51,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:51,121 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:54:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:51,122 INFO L85 PathProgramCache]: Analyzing trace with hash -743624034, now seen corresponding path program 1 times [2022-12-13 11:54:51,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:51,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076571545] [2022-12-13 11:54:51,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:51,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:51,214 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 11:54:51,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:51,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076571545] [2022-12-13 11:54:51,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076571545] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:54:51,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:54:51,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:54:51,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923237550] [2022-12-13 11:54:51,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:54:51,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:54:51,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:51,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:54:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:54:51,252 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 264 [2022-12-13 11:54:51,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 109.4) internal successors, (547), 5 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 11:54:51,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:54:51,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 264 [2022-12-13 11:54:51,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:54:51,728 INFO L130 PetriNetUnfolder]: 2704/4697 cut-off events. [2022-12-13 11:54:51,728 INFO L131 PetriNetUnfolder]: For 4166/4166 co-relation queries the response was YES. [2022-12-13 11:54:51,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13989 conditions, 4697 events. 2704/4697 cut-off events. For 4166/4166 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 32220 event pairs, 1707 based on Foata normal form. 0/3148 useless extension candidates. Maximal degree in co-relation 13971. Up to 4650 conditions per place. [2022-12-13 11:54:51,740 INFO L137 encePairwiseOnDemand]: 257/264 looper letters, 50 selfloop transitions, 2 changer transitions 15/69 dead transitions. [2022-12-13 11:54:51,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 69 transitions, 481 flow [2022-12-13 11:54:51,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:54:51,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:54:51,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 586 transitions. [2022-12-13 11:54:51,741 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44393939393939397 [2022-12-13 11:54:51,741 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 586 transitions. [2022-12-13 11:54:51,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 586 transitions. [2022-12-13 11:54:51,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:54:51,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 586 transitions. [2022-12-13 11:54:51,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:51,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:51,744 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:51,744 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 320 flow. Second operand 5 states and 586 transitions. [2022-12-13 11:54:51,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 69 transitions, 481 flow [2022-12-13 11:54:51,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 472 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 11:54:51,748 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 308 flow [2022-12-13 11:54:51,748 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2022-12-13 11:54:51,749 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 23 predicate places. [2022-12-13 11:54:51,749 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 308 flow [2022-12-13 11:54:51,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.4) internal successors, (547), 5 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 11:54:51,749 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:54:51,749 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:54:51,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 11:54:51,749 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:54:51,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:51,750 INFO L85 PathProgramCache]: Analyzing trace with hash -555680102, now seen corresponding path program 1 times [2022-12-13 11:54:51,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:51,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548103833] [2022-12-13 11:54:51,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:51,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:51,925 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 11:54:51,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:51,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548103833] [2022-12-13 11:54:51,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548103833] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:54:51,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660776939] [2022-12-13 11:54:51,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:51,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:51,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:54:51,927 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:54:51,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:54:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:51,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 11:54:52,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:54:52,026 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 11 treesize of output 7 [2022-12-13 11:54:52,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:54:52,057 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 16 treesize of output 18 [2022-12-13 11:54:52,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:54:52,107 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 16 treesize of output 18 [2022-12-13 11:54:52,117 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 11:54:52,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:54:52,135 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_217 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_217) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) 9223372039002259456))) is different from false [2022-12-13 11:54:52,140 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_217 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_217) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2022-12-13 11:54:52,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:52,176 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 27 treesize of output 28 [2022-12-13 11:54:52,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:52,184 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 143 treesize of output 137 [2022-12-13 11:54:52,191 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 61 treesize of output 57 [2022-12-13 11:54:52,196 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 118 treesize of output 110 [2022-12-13 11:54:52,242 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 11:54:52,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660776939] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:54:52,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:54:52,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-12-13 11:54:52,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026573158] [2022-12-13 11:54:52,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:54:52,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:54:52,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:52,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:54:52,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=143, Unknown=2, NotChecked=50, Total=240 [2022-12-13 11:54:52,254 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 11:54:52,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 308 flow. Second operand has 16 states, 16 states have (on average 89.25) internal successors, (1428), 16 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:52,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:54:52,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 11:54:52,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:54:52,966 INFO L130 PetriNetUnfolder]: 3709/6162 cut-off events. [2022-12-13 11:54:52,967 INFO L131 PetriNetUnfolder]: For 6220/6220 co-relation queries the response was YES. [2022-12-13 11:54:52,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19417 conditions, 6162 events. 3709/6162 cut-off events. For 6220/6220 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 45309 event pairs, 1648 based on Foata normal form. 348/4594 useless extension candidates. Maximal degree in co-relation 19396. Up to 2496 conditions per place. [2022-12-13 11:54:52,999 INFO L137 encePairwiseOnDemand]: 252/264 looper letters, 64 selfloop transitions, 21 changer transitions 0/86 dead transitions. [2022-12-13 11:54:52,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 615 flow [2022-12-13 11:54:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:54:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:54:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 680 transitions. [2022-12-13 11:54:53,000 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36796536796536794 [2022-12-13 11:54:53,000 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 680 transitions. [2022-12-13 11:54:53,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 680 transitions. [2022-12-13 11:54:53,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:54:53,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 680 transitions. [2022-12-13 11:54:53,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.14285714285714) internal successors, (680), 7 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:53,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 264.0) internal successors, (2112), 8 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:53,003 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 264.0) internal successors, (2112), 8 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:53,003 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 308 flow. Second operand 7 states and 680 transitions. [2022-12-13 11:54:53,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 615 flow [2022-12-13 11:54:53,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 552 flow, removed 27 selfloop flow, removed 8 redundant places. [2022-12-13 11:54:53,015 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 377 flow [2022-12-13 11:54:53,015 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=377, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2022-12-13 11:54:53,016 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2022-12-13 11:54:53,016 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 377 flow [2022-12-13 11:54:53,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 89.25) internal successors, (1428), 16 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:53,016 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:54:53,016 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:54:53,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 11:54:53,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 11:54:53,218 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:54:53,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:53,219 INFO L85 PathProgramCache]: Analyzing trace with hash -555680101, now seen corresponding path program 1 times [2022-12-13 11:54:53,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:53,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890318869] [2022-12-13 11:54:53,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:53,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:53,421 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 11:54:53,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:53,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890318869] [2022-12-13 11:54:53,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890318869] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:54:53,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547114176] [2022-12-13 11:54:53,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:53,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:53,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:54:53,422 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:54:53,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 11:54:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:53,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 11:54:53,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:54:53,516 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 11 treesize of output 7 [2022-12-13 11:54:53,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:54:53,547 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 14 treesize of output 16 [2022-12-13 11:54:53,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:54:53,595 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 14 treesize of output 16 [2022-12-13 11:54:53,604 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 11:54:53,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:54:53,622 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_251 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_251) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) 4294967296)) is different from false [2022-12-13 11:54:53,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:53,680 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 25 treesize of output 26 [2022-12-13 11:54:53,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:53,687 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 63 treesize of output 61 [2022-12-13 11:54:53,690 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 48 treesize of output 44 [2022-12-13 11:54:53,694 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 22 treesize of output 20 [2022-12-13 11:54:53,739 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 11:54:53,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547114176] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:54:53,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:54:53,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-12-13 11:54:53,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526517143] [2022-12-13 11:54:53,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:54:53,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:54:53,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:53,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:54:53,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=160, Unknown=5, NotChecked=26, Total=240 [2022-12-13 11:54:53,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 11:54:53,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 377 flow. Second operand has 16 states, 16 states have (on average 89.25) internal successors, (1428), 16 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:53,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:54:53,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 11:54:53,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:54:54,444 INFO L130 PetriNetUnfolder]: 3521/5850 cut-off events. [2022-12-13 11:54:54,444 INFO L131 PetriNetUnfolder]: For 7517/7517 co-relation queries the response was YES. [2022-12-13 11:54:54,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18565 conditions, 5850 events. 3521/5850 cut-off events. For 7517/7517 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 42661 event pairs, 1236 based on Foata normal form. 116/3786 useless extension candidates. Maximal degree in co-relation 18548. Up to 2496 conditions per place. [2022-12-13 11:54:54,461 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 63 selfloop transitions, 21 changer transitions 0/85 dead transitions. [2022-12-13 11:54:54,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 85 transitions, 626 flow [2022-12-13 11:54:54,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:54:54,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:54:54,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 677 transitions. [2022-12-13 11:54:54,463 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36634199134199136 [2022-12-13 11:54:54,463 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 677 transitions. [2022-12-13 11:54:54,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 677 transitions. [2022-12-13 11:54:54,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:54:54,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 677 transitions. [2022-12-13 11:54:54,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.71428571428571) internal successors, (677), 7 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:54,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 264.0) internal successors, (2112), 8 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:54,465 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 264.0) internal successors, (2112), 8 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:54,465 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 377 flow. Second operand 7 states and 677 transitions. [2022-12-13 11:54:54,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 85 transitions, 626 flow [2022-12-13 11:54:54,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 621 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:54:54,470 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 408 flow [2022-12-13 11:54:54,470 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=408, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2022-12-13 11:54:54,470 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 22 predicate places. [2022-12-13 11:54:54,470 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 408 flow [2022-12-13 11:54:54,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 89.25) internal successors, (1428), 16 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:54,471 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:54:54,471 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:54:54,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 11:54:54,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:54,672 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:54:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:54,673 INFO L85 PathProgramCache]: Analyzing trace with hash -41791364, now seen corresponding path program 1 times [2022-12-13 11:54:54,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:54,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936916443] [2022-12-13 11:54:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:54,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:54,866 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 11:54:54,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:54,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936916443] [2022-12-13 11:54:54,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936916443] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:54:54,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926234508] [2022-12-13 11:54:54,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:54,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:54,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:54:54,868 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:54:54,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 11:54:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:54,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 11:54:54,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:54:54,969 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 11 treesize of output 7 [2022-12-13 11:54:54,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:54:54,999 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 14 treesize of output 16 [2022-12-13 11:54:55,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:54:55,024 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 14 treesize of output 16 [2022-12-13 11:54:55,041 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 11:54:55,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:54:55,066 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_285 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_285) c_~A~0.base) c_~A~0.offset) 9223372039002259456)) is different from false [2022-12-13 11:54:55,075 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_285 (Array Int Int)) (v_ArrVal_284 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_284) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_285) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456)) is different from false [2022-12-13 11:54:55,084 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:55,085 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 25 treesize of output 26 [2022-12-13 11:54:55,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:55,091 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 125 treesize of output 119 [2022-12-13 11:54:55,097 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 53 treesize of output 49 [2022-12-13 11:54:55,101 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 102 treesize of output 94 [2022-12-13 11:54:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 11:54:55,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926234508] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:54:55,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:54:55,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-12-13 11:54:55,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681953820] [2022-12-13 11:54:55,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:54:55,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 11:54:55,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:55,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 11:54:55,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=122, Unknown=2, NotChecked=46, Total=210 [2022-12-13 11:54:55,188 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 11:54:55,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 408 flow. Second operand has 15 states, 15 states have (on average 89.4) internal successors, (1341), 15 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:55,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:54:55,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 11:54:55,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:54:55,948 INFO L130 PetriNetUnfolder]: 3869/7006 cut-off events. [2022-12-13 11:54:55,948 INFO L131 PetriNetUnfolder]: For 13705/13705 co-relation queries the response was YES. [2022-12-13 11:54:55,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23473 conditions, 7006 events. 3869/7006 cut-off events. For 13705/13705 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 54152 event pairs, 756 based on Foata normal form. 0/4826 useless extension candidates. Maximal degree in co-relation 23456. Up to 2913 conditions per place. [2022-12-13 11:54:55,968 INFO L137 encePairwiseOnDemand]: 252/264 looper letters, 82 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2022-12-13 11:54:55,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 95 transitions, 886 flow [2022-12-13 11:54:55,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:54:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:54:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 678 transitions. [2022-12-13 11:54:55,970 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36688311688311687 [2022-12-13 11:54:55,970 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 678 transitions. [2022-12-13 11:54:55,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 678 transitions. [2022-12-13 11:54:55,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:54:55,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 678 transitions. [2022-12-13 11:54:55,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.85714285714286) internal successors, (678), 7 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:55,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 264.0) internal successors, (2112), 8 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:55,973 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 264.0) internal successors, (2112), 8 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:55,973 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 408 flow. Second operand 7 states and 678 transitions. [2022-12-13 11:54:55,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 95 transitions, 886 flow [2022-12-13 11:54:55,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 864 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-12-13 11:54:55,977 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 450 flow [2022-12-13 11:54:55,977 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=450, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2022-12-13 11:54:55,978 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 26 predicate places. [2022-12-13 11:54:55,978 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 450 flow [2022-12-13 11:54:55,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 89.4) internal successors, (1341), 15 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:55,978 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:54:55,978 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:54:55,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 11:54:56,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:56,180 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:54:56,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:56,181 INFO L85 PathProgramCache]: Analyzing trace with hash -46291588, now seen corresponding path program 1 times [2022-12-13 11:54:56,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:56,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019493650] [2022-12-13 11:54:56,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:56,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:54:56,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:56,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019493650] [2022-12-13 11:54:56,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019493650] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:54:56,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987122493] [2022-12-13 11:54:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:56,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:56,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:54:56,262 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:54:56,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 11:54:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:56,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:54:56,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:54:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:54:56,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:54:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:54:56,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987122493] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:54:56,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:54:56,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-12-13 11:54:56,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880470008] [2022-12-13 11:54:56,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:54:56,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:54:56,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:56,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:54:56,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:54:56,537 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 264 [2022-12-13 11:54:56,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 450 flow. Second operand has 14 states, 14 states have (on average 106.5) internal successors, (1491), 14 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:56,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:54:56,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 264 [2022-12-13 11:54:56,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:54:57,235 INFO L130 PetriNetUnfolder]: 3186/5729 cut-off events. [2022-12-13 11:54:57,235 INFO L131 PetriNetUnfolder]: For 11937/12260 co-relation queries the response was YES. [2022-12-13 11:54:57,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22105 conditions, 5729 events. 3186/5729 cut-off events. For 11937/12260 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 44348 event pairs, 2022 based on Foata normal form. 451/5043 useless extension candidates. Maximal degree in co-relation 22086. Up to 4244 conditions per place. [2022-12-13 11:54:57,251 INFO L137 encePairwiseOnDemand]: 253/264 looper letters, 143 selfloop transitions, 13 changer transitions 3/160 dead transitions. [2022-12-13 11:54:57,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 160 transitions, 1333 flow [2022-12-13 11:54:57,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:54:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:54:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1053 transitions. [2022-12-13 11:54:57,254 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2022-12-13 11:54:57,254 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1053 transitions. [2022-12-13 11:54:57,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1053 transitions. [2022-12-13 11:54:57,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:54:57,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1053 transitions. [2022-12-13 11:54:57,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:57,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 264.0) internal successors, (2640), 10 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:57,257 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 264.0) internal successors, (2640), 10 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:57,257 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 450 flow. Second operand 9 states and 1053 transitions. [2022-12-13 11:54:57,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 160 transitions, 1333 flow [2022-12-13 11:54:57,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 160 transitions, 1327 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:54:57,263 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 624 flow [2022-12-13 11:54:57,263 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=624, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2022-12-13 11:54:57,264 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 35 predicate places. [2022-12-13 11:54:57,264 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 624 flow [2022-12-13 11:54:57,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 106.5) internal successors, (1491), 14 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:57,264 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:54:57,264 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:54:57,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 11:54:57,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 11:54:57,466 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:54:57,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:57,468 INFO L85 PathProgramCache]: Analyzing trace with hash -41791363, now seen corresponding path program 1 times [2022-12-13 11:54:57,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:57,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065763557] [2022-12-13 11:54:57,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:57,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:57,636 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 11:54:57,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:57,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065763557] [2022-12-13 11:54:57,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065763557] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:54:57,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147503771] [2022-12-13 11:54:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:57,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:57,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:54:57,638 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:54:57,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 11:54:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:57,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 11:54:57,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:54:57,738 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 11 treesize of output 7 [2022-12-13 11:54:57,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:54:57,766 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 16 treesize of output 18 [2022-12-13 11:54:57,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:54:57,796 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 16 treesize of output 18 [2022-12-13 11:54:57,821 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 11:54:57,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:54:57,847 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_345 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_345) c_~A~0.base) c_~A~0.offset) 4294967296))) is different from false [2022-12-13 11:54:57,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:57,881 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 27 treesize of output 28 [2022-12-13 11:54:57,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:57,888 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 143 treesize of output 137 [2022-12-13 11:54:57,892 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 122 treesize of output 114 [2022-12-13 11:54:57,896 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 114 treesize of output 110 [2022-12-13 11:54:57,954 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 11:54:57,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147503771] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:54:57,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:54:57,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-12-13 11:54:57,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911267037] [2022-12-13 11:54:57,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:54:57,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:54:57,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:57,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:54:57,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=165, Unknown=3, NotChecked=26, Total=240 [2022-12-13 11:54:58,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 11:54:58,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 624 flow. Second operand has 16 states, 16 states have (on average 89.4375) internal successors, (1431), 16 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:58,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:54:58,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 11:54:58,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:54:58,756 INFO L130 PetriNetUnfolder]: 3026/5434 cut-off events. [2022-12-13 11:54:58,756 INFO L131 PetriNetUnfolder]: For 13860/14232 co-relation queries the response was YES. [2022-12-13 11:54:58,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22172 conditions, 5434 events. 3026/5434 cut-off events. For 13860/14232 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 41500 event pairs, 624 based on Foata normal form. 372/4841 useless extension candidates. Maximal degree in co-relation 22149. Up to 2308 conditions per place. [2022-12-13 11:54:58,780 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 96 selfloop transitions, 12 changer transitions 0/112 dead transitions. [2022-12-13 11:54:58,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 112 transitions, 1226 flow [2022-12-13 11:54:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:54:58,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:54:58,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 675 transitions. [2022-12-13 11:54:58,782 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3652597402597403 [2022-12-13 11:54:58,782 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 675 transitions. [2022-12-13 11:54:58,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 675 transitions. [2022-12-13 11:54:58,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:54:58,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 675 transitions. [2022-12-13 11:54:58,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.42857142857143) internal successors, (675), 7 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:58,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 264.0) internal successors, (2112), 8 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:58,784 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 264.0) internal successors, (2112), 8 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:58,784 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 624 flow. Second operand 7 states and 675 transitions. [2022-12-13 11:54:58,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 112 transitions, 1226 flow [2022-12-13 11:54:58,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 112 transitions, 1220 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 11:54:58,795 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 638 flow [2022-12-13 11:54:58,796 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=638, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2022-12-13 11:54:58,796 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 39 predicate places. [2022-12-13 11:54:58,796 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 638 flow [2022-12-13 11:54:58,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 89.4375) internal successors, (1431), 16 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:54:58,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:54:58,797 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:54:58,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 11:54:58,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 11:54:58,998 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:54:58,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:58,999 INFO L85 PathProgramCache]: Analyzing trace with hash 235684702, now seen corresponding path program 2 times [2022-12-13 11:54:59,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:59,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19039214] [2022-12-13 11:54:59,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:59,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:54:59,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:59,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19039214] [2022-12-13 11:54:59,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19039214] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:54:59,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32859545] [2022-12-13 11:54:59,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:54:59,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:59,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:54:59,297 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:54:59,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 11:54:59,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:54:59,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:54:59,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 11:54:59,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:54:59,407 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 11:54:59,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:54:59,427 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 11:54:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:54:59,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:54:59,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:59,551 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 26 treesize of output 27 [2022-12-13 11:54:59,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:59,556 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 43 treesize of output 39 [2022-12-13 11:54:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:54:59,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32859545] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:54:59,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:54:59,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-12-13 11:54:59,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832680538] [2022-12-13 11:54:59,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:54:59,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 11:54:59,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:59,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 11:54:59,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=320, Unknown=2, NotChecked=0, Total=380 [2022-12-13 11:54:59,889 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 264 [2022-12-13 11:54:59,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 638 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 11:54:59,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:54:59,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 264 [2022-12-13 11:54:59,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:00,870 INFO L130 PetriNetUnfolder]: 3004/5408 cut-off events. [2022-12-13 11:55:00,870 INFO L131 PetriNetUnfolder]: For 12928/13395 co-relation queries the response was YES. [2022-12-13 11:55:00,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23226 conditions, 5408 events. 3004/5408 cut-off events. For 12928/13395 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 41155 event pairs, 1215 based on Foata normal form. 473/5085 useless extension candidates. Maximal degree in co-relation 23202. Up to 2926 conditions per place. [2022-12-13 11:55:00,888 INFO L137 encePairwiseOnDemand]: 251/264 looper letters, 99 selfloop transitions, 41 changer transitions 0/141 dead transitions. [2022-12-13 11:55:00,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 141 transitions, 1392 flow [2022-12-13 11:55:00,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:55:00,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 11:55:00,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1367 transitions. [2022-12-13 11:55:00,890 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3983100233100233 [2022-12-13 11:55:00,890 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1367 transitions. [2022-12-13 11:55:00,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1367 transitions. [2022-12-13 11:55:00,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:00,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1367 transitions. [2022-12-13 11:55:00,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 105.15384615384616) internal successors, (1367), 13 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:00,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 264.0) internal successors, (3696), 14 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:00,895 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 264.0) internal successors, (3696), 14 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:00,895 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 638 flow. Second operand 13 states and 1367 transitions. [2022-12-13 11:55:00,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 141 transitions, 1392 flow [2022-12-13 11:55:00,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 141 transitions, 1370 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-12-13 11:55:00,911 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 891 flow [2022-12-13 11:55:00,911 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=891, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2022-12-13 11:55:00,912 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 49 predicate places. [2022-12-13 11:55:00,912 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 891 flow [2022-12-13 11:55:00,912 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 11:55:00,912 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:00,912 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:00,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 11:55:01,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 11:55:01,113 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:01,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:01,114 INFO L85 PathProgramCache]: Analyzing trace with hash 235684703, now seen corresponding path program 1 times [2022-12-13 11:55:01,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:01,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617606508] [2022-12-13 11:55:01,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:01,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:01,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:01,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617606508] [2022-12-13 11:55:01,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617606508] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:01,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38073792] [2022-12-13 11:55:01,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:01,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:01,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:01,332 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:01,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 11:55:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:01,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 11:55:01,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:01,441 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 11:55:01,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:55:01,459 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 16 treesize of output 18 [2022-12-13 11:55:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:01,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:01,547 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_411 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_411) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2022-12-13 11:55:01,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:01,556 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 24 treesize of output 25 [2022-12-13 11:55:01,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:01,561 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 37 treesize of output 33 [2022-12-13 11:55:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-13 11:55:01,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38073792] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:01,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:01,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-12-13 11:55:01,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401470233] [2022-12-13 11:55:01,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:01,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 11:55:01,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:01,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 11:55:01,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=289, Unknown=1, NotChecked=34, Total=380 [2022-12-13 11:55:01,632 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 264 [2022-12-13 11:55:01,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 891 flow. Second operand has 20 states, 20 states have (on average 92.35) internal successors, (1847), 20 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:01,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:01,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 264 [2022-12-13 11:55:01,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:02,742 INFO L130 PetriNetUnfolder]: 3001/5404 cut-off events. [2022-12-13 11:55:02,742 INFO L131 PetriNetUnfolder]: For 14735/15196 co-relation queries the response was YES. [2022-12-13 11:55:02,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24282 conditions, 5404 events. 3001/5404 cut-off events. For 14735/15196 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 40876 event pairs, 1192 based on Foata normal form. 464/5074 useless extension candidates. Maximal degree in co-relation 24256. Up to 2923 conditions per place. [2022-12-13 11:55:02,762 INFO L137 encePairwiseOnDemand]: 253/264 looper letters, 98 selfloop transitions, 41 changer transitions 0/140 dead transitions. [2022-12-13 11:55:02,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 140 transitions, 1478 flow [2022-12-13 11:55:02,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:55:02,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 11:55:02,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1286 transitions. [2022-12-13 11:55:02,765 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3747086247086247 [2022-12-13 11:55:02,765 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1286 transitions. [2022-12-13 11:55:02,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1286 transitions. [2022-12-13 11:55:02,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:02,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1286 transitions. [2022-12-13 11:55:02,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 98.92307692307692) internal successors, (1286), 13 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:02,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 264.0) internal successors, (3696), 14 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:02,769 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 264.0) internal successors, (3696), 14 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:02,769 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 891 flow. Second operand 13 states and 1286 transitions. [2022-12-13 11:55:02,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 140 transitions, 1478 flow [2022-12-13 11:55:02,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 140 transitions, 1458 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-13 11:55:02,808 INFO L231 Difference]: Finished difference. Result has 97 places, 85 transitions, 940 flow [2022-12-13 11:55:02,808 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=940, PETRI_PLACES=97, PETRI_TRANSITIONS=85} [2022-12-13 11:55:02,809 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 58 predicate places. [2022-12-13 11:55:02,809 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 85 transitions, 940 flow [2022-12-13 11:55:02,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 92.35) internal successors, (1847), 20 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:02,809 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:02,809 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:02,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 11:55:03,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 11:55:03,010 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:03,011 INFO L85 PathProgramCache]: Analyzing trace with hash 235684705, now seen corresponding path program 1 times [2022-12-13 11:55:03,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:03,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281651458] [2022-12-13 11:55:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:03,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:55:03,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:03,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281651458] [2022-12-13 11:55:03,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281651458] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:55:03,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:55:03,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:55:03,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652412333] [2022-12-13 11:55:03,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:55:03,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:55:03,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:03,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:55:03,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:55:03,096 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 264 [2022-12-13 11:55:03,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 85 transitions, 940 flow. Second operand has 4 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:03,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:03,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 264 [2022-12-13 11:55:03,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:03,857 INFO L130 PetriNetUnfolder]: 3427/6246 cut-off events. [2022-12-13 11:55:03,857 INFO L131 PetriNetUnfolder]: For 18121/18542 co-relation queries the response was YES. [2022-12-13 11:55:03,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28396 conditions, 6246 events. 3427/6246 cut-off events. For 18121/18542 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 47935 event pairs, 551 based on Foata normal form. 421/5930 useless extension candidates. Maximal degree in co-relation 28370. Up to 2898 conditions per place. [2022-12-13 11:55:03,893 INFO L137 encePairwiseOnDemand]: 252/264 looper letters, 107 selfloop transitions, 29 changer transitions 0/141 dead transitions. [2022-12-13 11:55:03,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 141 transitions, 1609 flow [2022-12-13 11:55:03,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:55:03,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:55:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 652 transitions. [2022-12-13 11:55:03,895 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49393939393939396 [2022-12-13 11:55:03,896 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 652 transitions. [2022-12-13 11:55:03,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 652 transitions. [2022-12-13 11:55:03,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:03,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 652 transitions. [2022-12-13 11:55:03,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.4) internal successors, (652), 5 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:03,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:03,899 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:03,899 INFO L175 Difference]: Start difference. First operand has 97 places, 85 transitions, 940 flow. Second operand 5 states and 652 transitions. [2022-12-13 11:55:03,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 141 transitions, 1609 flow [2022-12-13 11:55:03,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 141 transitions, 1569 flow, removed 1 selfloop flow, removed 7 redundant places. [2022-12-13 11:55:03,929 INFO L231 Difference]: Finished difference. Result has 98 places, 103 transitions, 1259 flow [2022-12-13 11:55:03,929 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1259, PETRI_PLACES=98, PETRI_TRANSITIONS=103} [2022-12-13 11:55:03,930 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 59 predicate places. [2022-12-13 11:55:03,930 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 103 transitions, 1259 flow [2022-12-13 11:55:03,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:03,930 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:03,930 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:03,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 11:55:03,930 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:03,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:03,931 INFO L85 PathProgramCache]: Analyzing trace with hash 235684699, now seen corresponding path program 1 times [2022-12-13 11:55:03,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:03,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133058066] [2022-12-13 11:55:03,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:03,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:55:03,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:03,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133058066] [2022-12-13 11:55:03,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133058066] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:55:03,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:55:03,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:55:03,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033936367] [2022-12-13 11:55:03,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:55:03,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:55:03,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:03,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:55:03,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:55:04,002 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 264 [2022-12-13 11:55:04,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 103 transitions, 1259 flow. Second operand has 4 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:04,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:04,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 264 [2022-12-13 11:55:04,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:04,675 INFO L130 PetriNetUnfolder]: 3192/5955 cut-off events. [2022-12-13 11:55:04,675 INFO L131 PetriNetUnfolder]: For 30285/30687 co-relation queries the response was YES. [2022-12-13 11:55:04,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30564 conditions, 5955 events. 3192/5955 cut-off events. For 30285/30687 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 46331 event pairs, 443 based on Foata normal form. 661/6155 useless extension candidates. Maximal degree in co-relation 30533. Up to 2550 conditions per place. [2022-12-13 11:55:04,700 INFO L137 encePairwiseOnDemand]: 252/264 looper letters, 118 selfloop transitions, 44 changer transitions 0/167 dead transitions. [2022-12-13 11:55:04,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 167 transitions, 2178 flow [2022-12-13 11:55:04,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:55:04,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:55:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 652 transitions. [2022-12-13 11:55:04,701 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49393939393939396 [2022-12-13 11:55:04,701 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 652 transitions. [2022-12-13 11:55:04,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 652 transitions. [2022-12-13 11:55:04,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:04,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 652 transitions. [2022-12-13 11:55:04,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.4) internal successors, (652), 5 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:04,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:04,703 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:04,703 INFO L175 Difference]: Start difference. First operand has 98 places, 103 transitions, 1259 flow. Second operand 5 states and 652 transitions. [2022-12-13 11:55:04,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 167 transitions, 2178 flow [2022-12-13 11:55:04,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 167 transitions, 2165 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-13 11:55:04,738 INFO L231 Difference]: Finished difference. Result has 105 places, 129 transitions, 1861 flow [2022-12-13 11:55:04,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1861, PETRI_PLACES=105, PETRI_TRANSITIONS=129} [2022-12-13 11:55:04,738 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 66 predicate places. [2022-12-13 11:55:04,738 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 129 transitions, 1861 flow [2022-12-13 11:55:04,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:04,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:04,739 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:04,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 11:55:04,739 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:04,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:04,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1506767582, now seen corresponding path program 1 times [2022-12-13 11:55:04,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:04,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668936394] [2022-12-13 11:55:04,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:04,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:04,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:04,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668936394] [2022-12-13 11:55:04,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668936394] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:04,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745708589] [2022-12-13 11:55:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:04,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:04,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:04,809 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:04,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 11:55:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:04,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:55:04,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:04,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:04,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745708589] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:04,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:04,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-12-13 11:55:04,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541037324] [2022-12-13 11:55:04,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:04,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:55:04,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:04,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:55:04,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:55:05,067 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 264 [2022-12-13 11:55:05,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 129 transitions, 1861 flow. Second operand has 14 states, 14 states have (on average 106.64285714285714) internal successors, (1493), 14 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:05,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:05,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 264 [2022-12-13 11:55:05,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:05,894 INFO L130 PetriNetUnfolder]: 3099/5748 cut-off events. [2022-12-13 11:55:05,894 INFO L131 PetriNetUnfolder]: For 40236/40236 co-relation queries the response was YES. [2022-12-13 11:55:05,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32830 conditions, 5748 events. 3099/5748 cut-off events. For 40236/40236 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 43307 event pairs, 1725 based on Foata normal form. 124/5431 useless extension candidates. Maximal degree in co-relation 32793. Up to 4712 conditions per place. [2022-12-13 11:55:05,917 INFO L137 encePairwiseOnDemand]: 253/264 looper letters, 131 selfloop transitions, 8 changer transitions 36/179 dead transitions. [2022-12-13 11:55:05,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 179 transitions, 2672 flow [2022-12-13 11:55:05,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:55:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:55:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1027 transitions. [2022-12-13 11:55:05,919 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43223905723905726 [2022-12-13 11:55:05,919 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1027 transitions. [2022-12-13 11:55:05,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1027 transitions. [2022-12-13 11:55:05,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:05,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1027 transitions. [2022-12-13 11:55:05,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.11111111111111) internal successors, (1027), 9 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:05,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 264.0) internal successors, (2640), 10 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:05,921 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 264.0) internal successors, (2640), 10 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:05,921 INFO L175 Difference]: Start difference. First operand has 105 places, 129 transitions, 1861 flow. Second operand 9 states and 1027 transitions. [2022-12-13 11:55:05,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 179 transitions, 2672 flow [2022-12-13 11:55:05,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 179 transitions, 2668 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-12-13 11:55:05,961 INFO L231 Difference]: Finished difference. Result has 116 places, 114 transitions, 1608 flow [2022-12-13 11:55:05,961 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1608, PETRI_PLACES=116, PETRI_TRANSITIONS=114} [2022-12-13 11:55:05,961 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 77 predicate places. [2022-12-13 11:55:05,961 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 114 transitions, 1608 flow [2022-12-13 11:55:05,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 106.64285714285714) internal successors, (1493), 14 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:05,961 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:05,962 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:05,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 11:55:06,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:06,162 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:06,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:06,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1281282074, now seen corresponding path program 1 times [2022-12-13 11:55:06,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:06,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187129736] [2022-12-13 11:55:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:06,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:06,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:06,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187129736] [2022-12-13 11:55:06,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187129736] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:06,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073902396] [2022-12-13 11:55:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:06,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:06,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:06,415 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:06,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 11:55:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:06,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 11:55:06,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:06,536 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 11:55:06,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:55:06,560 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 11:55:06,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:55:06,597 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 11:55:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:06,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:06,710 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_508 (Array Int Int)) (v_ArrVal_509 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_508) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_509) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2022-12-13 11:55:06,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:06,718 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 11:55:06,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:06,724 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 159 treesize of output 149 [2022-12-13 11:55:06,728 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 134 treesize of output 126 [2022-12-13 11:55:06,732 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 126 treesize of output 110 [2022-12-13 11:55:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-13 11:55:06,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073902396] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:06,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:06,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-12-13 11:55:06,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511400796] [2022-12-13 11:55:06,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:06,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 11:55:06,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:06,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 11:55:06,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=385, Unknown=14, NotChecked=40, Total=506 [2022-12-13 11:55:06,890 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 11:55:06,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 114 transitions, 1608 flow. Second operand has 23 states, 23 states have (on average 89.30434782608695) internal successors, (2054), 23 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:06,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:06,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 11:55:06,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:08,426 INFO L130 PetriNetUnfolder]: 4066/7436 cut-off events. [2022-12-13 11:55:08,426 INFO L131 PetriNetUnfolder]: For 62356/62704 co-relation queries the response was YES. [2022-12-13 11:55:08,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45452 conditions, 7436 events. 4066/7436 cut-off events. For 62356/62704 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 57986 event pairs, 1337 based on Foata normal form. 681/7598 useless extension candidates. Maximal degree in co-relation 45410. Up to 2773 conditions per place. [2022-12-13 11:55:08,460 INFO L137 encePairwiseOnDemand]: 252/264 looper letters, 154 selfloop transitions, 52 changer transitions 1/209 dead transitions. [2022-12-13 11:55:08,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 209 transitions, 3150 flow [2022-12-13 11:55:08,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 11:55:08,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 11:55:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1077 transitions. [2022-12-13 11:55:08,462 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37086776859504134 [2022-12-13 11:55:08,462 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1077 transitions. [2022-12-13 11:55:08,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1077 transitions. [2022-12-13 11:55:08,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:08,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1077 transitions. [2022-12-13 11:55:08,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 97.9090909090909) internal successors, (1077), 11 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:08,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 264.0) internal successors, (3168), 12 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:08,465 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 264.0) internal successors, (3168), 12 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:08,465 INFO L175 Difference]: Start difference. First operand has 116 places, 114 transitions, 1608 flow. Second operand 11 states and 1077 transitions. [2022-12-13 11:55:08,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 209 transitions, 3150 flow [2022-12-13 11:55:08,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 209 transitions, 3026 flow, removed 25 selfloop flow, removed 6 redundant places. [2022-12-13 11:55:08,542 INFO L231 Difference]: Finished difference. Result has 120 places, 127 transitions, 1948 flow [2022-12-13 11:55:08,542 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1948, PETRI_PLACES=120, PETRI_TRANSITIONS=127} [2022-12-13 11:55:08,542 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 81 predicate places. [2022-12-13 11:55:08,542 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 127 transitions, 1948 flow [2022-12-13 11:55:08,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 89.30434782608695) internal successors, (2054), 23 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:08,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:08,543 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:08,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 11:55:08,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:08,744 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:08,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:08,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1281282073, now seen corresponding path program 1 times [2022-12-13 11:55:08,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:08,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190543788] [2022-12-13 11:55:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:08,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:08,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:08,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190543788] [2022-12-13 11:55:08,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190543788] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:08,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421196244] [2022-12-13 11:55:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:08,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:08,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:08,965 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:08,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 11:55:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:09,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 11:55:09,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:09,075 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 11:55:09,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:55:09,097 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 16 treesize of output 18 [2022-12-13 11:55:09,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:55:09,126 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 16 treesize of output 18 [2022-12-13 11:55:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:09,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:09,229 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_546 (Array Int Int)) (v_ArrVal_547 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_546) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_547) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2022-12-13 11:55:09,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:09,236 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 27 treesize of output 28 [2022-12-13 11:55:09,240 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:09,240 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 71 treesize of output 67 [2022-12-13 11:55:09,242 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 54 treesize of output 46 [2022-12-13 11:55:09,245 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 24 treesize of output 20 [2022-12-13 11:55:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-13 11:55:09,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421196244] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:09,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:09,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-12-13 11:55:09,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345770330] [2022-12-13 11:55:09,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:09,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 11:55:09,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:09,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 11:55:09,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=392, Unknown=8, NotChecked=40, Total=506 [2022-12-13 11:55:09,321 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 11:55:09,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 127 transitions, 1948 flow. Second operand has 23 states, 23 states have (on average 89.30434782608695) internal successors, (2054), 23 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:09,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:09,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 11:55:09,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:10,939 INFO L130 PetriNetUnfolder]: 3882/7113 cut-off events. [2022-12-13 11:55:10,939 INFO L131 PetriNetUnfolder]: For 63791/64139 co-relation queries the response was YES. [2022-12-13 11:55:10,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43783 conditions, 7113 events. 3882/7113 cut-off events. For 63791/64139 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 55154 event pairs, 1221 based on Foata normal form. 477/7083 useless extension candidates. Maximal degree in co-relation 43740. Up to 2719 conditions per place. [2022-12-13 11:55:10,970 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 179 selfloop transitions, 52 changer transitions 0/233 dead transitions. [2022-12-13 11:55:10,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 233 transitions, 3528 flow [2022-12-13 11:55:10,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:55:10,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 11:55:10,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1272 transitions. [2022-12-13 11:55:10,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3706293706293706 [2022-12-13 11:55:10,972 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1272 transitions. [2022-12-13 11:55:10,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1272 transitions. [2022-12-13 11:55:10,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:10,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1272 transitions. [2022-12-13 11:55:10,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 97.84615384615384) internal successors, (1272), 13 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:10,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 264.0) internal successors, (3696), 14 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:10,976 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 264.0) internal successors, (3696), 14 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:10,976 INFO L175 Difference]: Start difference. First operand has 120 places, 127 transitions, 1948 flow. Second operand 13 states and 1272 transitions. [2022-12-13 11:55:10,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 233 transitions, 3528 flow [2022-12-13 11:55:11,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 233 transitions, 3477 flow, removed 11 selfloop flow, removed 7 redundant places. [2022-12-13 11:55:11,046 INFO L231 Difference]: Finished difference. Result has 124 places, 126 transitions, 1991 flow [2022-12-13 11:55:11,046 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=1887, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1991, PETRI_PLACES=124, PETRI_TRANSITIONS=126} [2022-12-13 11:55:11,046 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 85 predicate places. [2022-12-13 11:55:11,046 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 126 transitions, 1991 flow [2022-12-13 11:55:11,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 89.30434782608695) internal successors, (2054), 23 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:11,047 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:11,047 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:11,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 11:55:11,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:11,248 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:11,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:11,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1917028275, now seen corresponding path program 1 times [2022-12-13 11:55:11,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:11,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052016727] [2022-12-13 11:55:11,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:11,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:11,308 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 11:55:11,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:11,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052016727] [2022-12-13 11:55:11,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052016727] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:55:11,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:55:11,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:55:11,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180771451] [2022-12-13 11:55:11,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:55:11,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:55:11,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:11,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:55:11,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:55:11,314 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 264 [2022-12-13 11:55:11,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 126 transitions, 1991 flow. Second operand has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:11,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:11,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 264 [2022-12-13 11:55:11,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:12,020 INFO L130 PetriNetUnfolder]: 3234/5858 cut-off events. [2022-12-13 11:55:12,020 INFO L131 PetriNetUnfolder]: For 62942/63698 co-relation queries the response was YES. [2022-12-13 11:55:12,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35943 conditions, 5858 events. 3234/5858 cut-off events. For 62942/63698 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 44199 event pairs, 410 based on Foata normal form. 1042/6423 useless extension candidates. Maximal degree in co-relation 35902. Up to 3155 conditions per place. [2022-12-13 11:55:12,047 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 105 selfloop transitions, 28 changer transitions 0/139 dead transitions. [2022-12-13 11:55:12,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 139 transitions, 2158 flow [2022-12-13 11:55:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:55:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:55:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 636 transitions. [2022-12-13 11:55:12,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2022-12-13 11:55:12,049 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 636 transitions. [2022-12-13 11:55:12,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 636 transitions. [2022-12-13 11:55:12,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:12,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 636 transitions. [2022-12-13 11:55:12,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:12,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:12,050 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:12,051 INFO L175 Difference]: Start difference. First operand has 124 places, 126 transitions, 1991 flow. Second operand 5 states and 636 transitions. [2022-12-13 11:55:12,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 139 transitions, 2158 flow [2022-12-13 11:55:12,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 139 transitions, 2041 flow, removed 18 selfloop flow, removed 10 redundant places. [2022-12-13 11:55:12,109 INFO L231 Difference]: Finished difference. Result has 115 places, 104 transitions, 1519 flow [2022-12-13 11:55:12,109 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1519, PETRI_PLACES=115, PETRI_TRANSITIONS=104} [2022-12-13 11:55:12,109 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 76 predicate places. [2022-12-13 11:55:12,110 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 104 transitions, 1519 flow [2022-12-13 11:55:12,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:12,110 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:12,110 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:12,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 11:55:12,110 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:12,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:12,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1110492540, now seen corresponding path program 2 times [2022-12-13 11:55:12,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:12,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52197091] [2022-12-13 11:55:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:12,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:12,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:12,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52197091] [2022-12-13 11:55:12,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52197091] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:12,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445534031] [2022-12-13 11:55:12,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:55:12,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:12,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:12,306 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:12,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 11:55:12,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:55:12,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:12,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 11:55:12,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:12,437 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 11:55:12,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:55:12,481 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 11:55:12,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:55:12,520 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 11:55:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:12,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:12,688 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_thread2Thread1of1ForFork0_~i~1#1_68| Int) (v_ArrVal_600 (Array Int Int))) (or (not (< |v_thread2Thread1of1ForFork0_~i~1#1_68| c_~N~0)) (< |v_thread2Thread1of1ForFork0_~i~1#1_68| 1) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_600) c_~A~0.base) (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork0_~i~1#1_68| 4))) 9223372039002259456))) is different from false [2022-12-13 11:55:12,737 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:12,738 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 11:55:12,746 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:12,746 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 11:55:12,750 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 11:55:12,756 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 11:55:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:12,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445534031] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:12,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:12,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-12-13 11:55:12,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436191079] [2022-12-13 11:55:12,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:12,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 11:55:12,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:12,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 11:55:12,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=399, Unknown=1, NotChecked=40, Total=506 [2022-12-13 11:55:13,070 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 264 [2022-12-13 11:55:13,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 104 transitions, 1519 flow. Second operand has 23 states, 23 states have (on average 80.43478260869566) internal successors, (1850), 23 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:13,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:13,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 264 [2022-12-13 11:55:13,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:16,777 INFO L130 PetriNetUnfolder]: 4803/8335 cut-off events. [2022-12-13 11:55:16,777 INFO L131 PetriNetUnfolder]: For 73947/74075 co-relation queries the response was YES. [2022-12-13 11:55:16,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50932 conditions, 8335 events. 4803/8335 cut-off events. For 73947/74075 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 59923 event pairs, 617 based on Foata normal form. 546/8286 useless extension candidates. Maximal degree in co-relation 50893. Up to 3085 conditions per place. [2022-12-13 11:55:16,814 INFO L137 encePairwiseOnDemand]: 253/264 looper letters, 541 selfloop transitions, 65 changer transitions 12/622 dead transitions. [2022-12-13 11:55:16,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 622 transitions, 10367 flow [2022-12-13 11:55:16,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 11:55:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 11:55:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2657 transitions. [2022-12-13 11:55:16,817 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.335479797979798 [2022-12-13 11:55:16,817 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2657 transitions. [2022-12-13 11:55:16,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2657 transitions. [2022-12-13 11:55:16,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:16,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2657 transitions. [2022-12-13 11:55:16,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 88.56666666666666) internal successors, (2657), 30 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:16,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 264.0) internal successors, (8184), 31 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:16,824 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 264.0) internal successors, (8184), 31 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:16,824 INFO L175 Difference]: Start difference. First operand has 115 places, 104 transitions, 1519 flow. Second operand 30 states and 2657 transitions. [2022-12-13 11:55:16,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 622 transitions, 10367 flow [2022-12-13 11:55:16,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 622 transitions, 10367 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 11:55:16,913 INFO L231 Difference]: Finished difference. Result has 150 places, 157 transitions, 2449 flow [2022-12-13 11:55:16,914 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2449, PETRI_PLACES=150, PETRI_TRANSITIONS=157} [2022-12-13 11:55:16,914 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 111 predicate places. [2022-12-13 11:55:16,914 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 157 transitions, 2449 flow [2022-12-13 11:55:16,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 80.43478260869566) internal successors, (1850), 23 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:16,914 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:16,914 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:16,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 11:55:17,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 11:55:17,116 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:17,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:17,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1917028281, now seen corresponding path program 1 times [2022-12-13 11:55:17,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:17,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237163789] [2022-12-13 11:55:17,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:17,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:17,195 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 11:55:17,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:17,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237163789] [2022-12-13 11:55:17,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237163789] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:55:17,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:55:17,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:55:17,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670083193] [2022-12-13 11:55:17,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:55:17,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:55:17,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:17,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:55:17,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:55:17,201 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 264 [2022-12-13 11:55:17,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 157 transitions, 2449 flow. Second operand has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:17,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:17,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 264 [2022-12-13 11:55:17,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:18,151 INFO L130 PetriNetUnfolder]: 3827/6621 cut-off events. [2022-12-13 11:55:18,151 INFO L131 PetriNetUnfolder]: For 89058/89889 co-relation queries the response was YES. [2022-12-13 11:55:18,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43796 conditions, 6621 events. 3827/6621 cut-off events. For 89058/89889 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 46482 event pairs, 368 based on Foata normal form. 1290/7656 useless extension candidates. Maximal degree in co-relation 43749. Up to 3386 conditions per place. [2022-12-13 11:55:18,184 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 117 selfloop transitions, 30 changer transitions 9/161 dead transitions. [2022-12-13 11:55:18,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 161 transitions, 2360 flow [2022-12-13 11:55:18,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:55:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:55:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 634 transitions. [2022-12-13 11:55:18,185 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4803030303030303 [2022-12-13 11:55:18,185 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 634 transitions. [2022-12-13 11:55:18,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 634 transitions. [2022-12-13 11:55:18,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:18,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 634 transitions. [2022-12-13 11:55:18,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.8) internal successors, (634), 5 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:18,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:18,187 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:18,187 INFO L175 Difference]: Start difference. First operand has 150 places, 157 transitions, 2449 flow. Second operand 5 states and 634 transitions. [2022-12-13 11:55:18,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 161 transitions, 2360 flow [2022-12-13 11:55:18,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 161 transitions, 2022 flow, removed 45 selfloop flow, removed 21 redundant places. [2022-12-13 11:55:18,292 INFO L231 Difference]: Finished difference. Result has 128 places, 106 transitions, 1312 flow [2022-12-13 11:55:18,292 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1312, PETRI_PLACES=128, PETRI_TRANSITIONS=106} [2022-12-13 11:55:18,293 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 89 predicate places. [2022-12-13 11:55:18,293 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 106 transitions, 1312 flow [2022-12-13 11:55:18,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:18,293 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:18,293 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:18,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 11:55:18,293 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:18,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:18,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1110492539, now seen corresponding path program 1 times [2022-12-13 11:55:18,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:18,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845429742] [2022-12-13 11:55:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:18,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:18,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:18,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845429742] [2022-12-13 11:55:18,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845429742] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:18,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448693235] [2022-12-13 11:55:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:18,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:18,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:18,529 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:18,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 11:55:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:18,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 11:55:18,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:18,661 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 11:55:18,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:55:18,680 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 11:55:18,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:55:18,699 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 11:55:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:18,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:18,774 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_653 (Array Int Int))) (< 0 (+ 4294967296 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_653) c_~A~0.base) (+ c_~A~0.offset 4))))) is different from false [2022-12-13 11:55:18,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:18,814 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 11:55:18,820 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:18,820 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 81 treesize of output 77 [2022-12-13 11:55:18,823 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 62 treesize of output 54 [2022-12-13 11:55:18,827 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 28 treesize of output 24 [2022-12-13 11:55:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:18,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448693235] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:18,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:18,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-12-13 11:55:18,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642859636] [2022-12-13 11:55:18,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:18,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 11:55:18,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:18,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 11:55:18,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=390, Unknown=7, NotChecked=40, Total=506 [2022-12-13 11:55:18,922 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 11:55:18,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 106 transitions, 1312 flow. Second operand has 23 states, 23 states have (on average 89.43478260869566) internal successors, (2057), 23 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:18,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:18,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 11:55:18,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:20,111 INFO L130 PetriNetUnfolder]: 3490/6153 cut-off events. [2022-12-13 11:55:20,111 INFO L131 PetriNetUnfolder]: For 55751/56063 co-relation queries the response was YES. [2022-12-13 11:55:20,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36006 conditions, 6153 events. 3490/6153 cut-off events. For 55751/56063 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 43310 event pairs, 891 based on Foata normal form. 904/6838 useless extension candidates. Maximal degree in co-relation 35969. Up to 2157 conditions per place. [2022-12-13 11:55:20,139 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 161 selfloop transitions, 40 changer transitions 0/203 dead transitions. [2022-12-13 11:55:20,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 203 transitions, 3024 flow [2022-12-13 11:55:20,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 11:55:20,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 11:55:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1053 transitions. [2022-12-13 11:55:20,141 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36260330578512395 [2022-12-13 11:55:20,141 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1053 transitions. [2022-12-13 11:55:20,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1053 transitions. [2022-12-13 11:55:20,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:20,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1053 transitions. [2022-12-13 11:55:20,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 95.72727272727273) internal successors, (1053), 11 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:20,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 264.0) internal successors, (3168), 12 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:20,144 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 264.0) internal successors, (3168), 12 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:20,144 INFO L175 Difference]: Start difference. First operand has 128 places, 106 transitions, 1312 flow. Second operand 11 states and 1053 transitions. [2022-12-13 11:55:20,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 203 transitions, 3024 flow [2022-12-13 11:55:20,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 203 transitions, 2762 flow, removed 6 selfloop flow, removed 11 redundant places. [2022-12-13 11:55:20,247 INFO L231 Difference]: Finished difference. Result has 122 places, 108 transitions, 1335 flow [2022-12-13 11:55:20,247 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=1166, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1335, PETRI_PLACES=122, PETRI_TRANSITIONS=108} [2022-12-13 11:55:20,247 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 83 predicate places. [2022-12-13 11:55:20,248 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 108 transitions, 1335 flow [2022-12-13 11:55:20,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 89.43478260869566) internal successors, (2057), 23 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:20,248 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:20,248 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 11:55:20,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-13 11:55:20,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 11:55:20,449 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:20,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:20,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1140247220, now seen corresponding path program 3 times [2022-12-13 11:55:20,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:20,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999331889] [2022-12-13 11:55:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:20,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:20,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:20,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999331889] [2022-12-13 11:55:20,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999331889] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:20,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898642610] [2022-12-13 11:55:20,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:55:20,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:20,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:20,574 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:20,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 11:55:20,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 11:55:20,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:20,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:55:20,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:20,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:20,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898642610] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:20,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:20,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 11:55:20,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921199254] [2022-12-13 11:55:20,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:20,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 11:55:20,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:20,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 11:55:20,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-12-13 11:55:20,905 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 264 [2022-12-13 11:55:20,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 108 transitions, 1335 flow. Second operand has 19 states, 19 states have (on average 106.47368421052632) internal successors, (2023), 19 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:20,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:20,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 264 [2022-12-13 11:55:20,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:21,702 INFO L130 PetriNetUnfolder]: 2940/5209 cut-off events. [2022-12-13 11:55:21,703 INFO L131 PetriNetUnfolder]: For 44499/44856 co-relation queries the response was YES. [2022-12-13 11:55:21,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30255 conditions, 5209 events. 2940/5209 cut-off events. For 44499/44856 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 36121 event pairs, 1230 based on Foata normal form. 477/5522 useless extension candidates. Maximal degree in co-relation 30221. Up to 3144 conditions per place. [2022-12-13 11:55:21,725 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 207 selfloop transitions, 22 changer transitions 24/256 dead transitions. [2022-12-13 11:55:21,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 256 transitions, 3408 flow [2022-12-13 11:55:21,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 11:55:21,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 11:55:21,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1364 transitions. [2022-12-13 11:55:21,727 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2022-12-13 11:55:21,727 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1364 transitions. [2022-12-13 11:55:21,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1364 transitions. [2022-12-13 11:55:21,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:21,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1364 transitions. [2022-12-13 11:55:21,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 113.66666666666667) internal successors, (1364), 12 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:21,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 264.0) internal successors, (3432), 13 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:21,730 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 264.0) internal successors, (3432), 13 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:21,730 INFO L175 Difference]: Start difference. First operand has 122 places, 108 transitions, 1335 flow. Second operand 12 states and 1364 transitions. [2022-12-13 11:55:21,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 256 transitions, 3408 flow [2022-12-13 11:55:21,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 256 transitions, 3335 flow, removed 8 selfloop flow, removed 6 redundant places. [2022-12-13 11:55:21,758 INFO L231 Difference]: Finished difference. Result has 131 places, 122 transitions, 1653 flow [2022-12-13 11:55:21,758 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1653, PETRI_PLACES=131, PETRI_TRANSITIONS=122} [2022-12-13 11:55:21,758 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 92 predicate places. [2022-12-13 11:55:21,758 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 122 transitions, 1653 flow [2022-12-13 11:55:21,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.47368421052632) internal successors, (2023), 19 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:21,759 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:21,759 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 11:55:21,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 11:55:21,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 11:55:21,960 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:21,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:21,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1740622806, now seen corresponding path program 4 times [2022-12-13 11:55:21,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:21,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833024528] [2022-12-13 11:55:21,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:21,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:22,217 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 11:55:22,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:22,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833024528] [2022-12-13 11:55:22,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833024528] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:22,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952874092] [2022-12-13 11:55:22,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:55:22,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:22,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:22,218 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:22,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 11:55:22,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:55:22,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:22,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 11:55:22,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:22,349 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 11:55:22,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:55:22,366 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 11:55:22,416 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 11:55:22,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:22,474 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_720 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_720) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2022-12-13 11:55:22,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:22,481 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 26 treesize of output 27 [2022-12-13 11:55:22,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:22,486 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 43 treesize of output 39 [2022-12-13 11:55:22,495 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 9 treesize of output 5 [2022-12-13 11:55:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-12-13 11:55:22,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952874092] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:22,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:22,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-12-13 11:55:22,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570850348] [2022-12-13 11:55:22,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:22,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 11:55:22,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:22,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 11:55:22,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=440, Unknown=1, NotChecked=42, Total=552 [2022-12-13 11:55:22,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 264 [2022-12-13 11:55:22,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 122 transitions, 1653 flow. Second operand has 24 states, 24 states have (on average 92.375) internal successors, (2217), 24 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:22,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:22,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 264 [2022-12-13 11:55:22,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:23,682 INFO L130 PetriNetUnfolder]: 2803/4969 cut-off events. [2022-12-13 11:55:23,683 INFO L131 PetriNetUnfolder]: For 38707/39079 co-relation queries the response was YES. [2022-12-13 11:55:23,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30067 conditions, 4969 events. 2803/4969 cut-off events. For 38707/39079 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 33475 event pairs, 1230 based on Foata normal form. 376/5184 useless extension candidates. Maximal degree in co-relation 30029. Up to 2909 conditions per place. [2022-12-13 11:55:23,707 INFO L137 encePairwiseOnDemand]: 253/264 looper letters, 150 selfloop transitions, 52 changer transitions 0/205 dead transitions. [2022-12-13 11:55:23,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 205 transitions, 2950 flow [2022-12-13 11:55:23,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 11:55:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 11:55:23,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1546 transitions. [2022-12-13 11:55:23,709 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3660037878787879 [2022-12-13 11:55:23,709 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1546 transitions. [2022-12-13 11:55:23,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1546 transitions. [2022-12-13 11:55:23,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:23,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1546 transitions. [2022-12-13 11:55:23,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 96.625) internal successors, (1546), 16 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:23,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 264.0) internal successors, (4488), 17 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:23,713 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 264.0) internal successors, (4488), 17 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:23,713 INFO L175 Difference]: Start difference. First operand has 131 places, 122 transitions, 1653 flow. Second operand 16 states and 1546 transitions. [2022-12-13 11:55:23,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 205 transitions, 2950 flow [2022-12-13 11:55:23,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 205 transitions, 2943 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:55:23,761 INFO L231 Difference]: Finished difference. Result has 146 places, 138 transitions, 1958 flow [2022-12-13 11:55:23,761 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1958, PETRI_PLACES=146, PETRI_TRANSITIONS=138} [2022-12-13 11:55:23,761 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 107 predicate places. [2022-12-13 11:55:23,761 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 138 transitions, 1958 flow [2022-12-13 11:55:23,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 92.375) internal successors, (2217), 24 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:23,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:23,761 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 11:55:23,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 11:55:23,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 11:55:23,963 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:23,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:23,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1740622805, now seen corresponding path program 2 times [2022-12-13 11:55:23,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:23,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544547842] [2022-12-13 11:55:23,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:23,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:24,179 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 11:55:24,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:24,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544547842] [2022-12-13 11:55:24,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544547842] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:24,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696653269] [2022-12-13 11:55:24,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:55:24,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:24,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:24,181 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:24,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 11:55:24,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:55:24,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:24,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 11:55:24,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:24,317 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 11:55:24,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:55:24,338 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 16 treesize of output 18 [2022-12-13 11:55:24,405 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 11:55:24,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:24,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:24,518 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 24 treesize of output 25 [2022-12-13 11:55:24,522 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:24,522 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 37 treesize of output 33 [2022-12-13 11:55:24,577 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 11:55:24,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696653269] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:24,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:24,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-12-13 11:55:24,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825281535] [2022-12-13 11:55:24,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:24,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 11:55:24,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 11:55:24,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=569, Unknown=4, NotChecked=0, Total=650 [2022-12-13 11:55:25,197 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 264 [2022-12-13 11:55:25,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 138 transitions, 1958 flow. Second operand has 26 states, 26 states have (on average 104.38461538461539) internal successors, (2714), 26 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:25,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:25,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 264 [2022-12-13 11:55:25,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:26,702 INFO L130 PetriNetUnfolder]: 2801/4967 cut-off events. [2022-12-13 11:55:26,702 INFO L131 PetriNetUnfolder]: For 41221/41584 co-relation queries the response was YES. [2022-12-13 11:55:26,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30940 conditions, 4967 events. 2801/4967 cut-off events. For 41221/41584 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 33410 event pairs, 1225 based on Foata normal form. 362/5168 useless extension candidates. Maximal degree in co-relation 30897. Up to 2907 conditions per place. [2022-12-13 11:55:26,737 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 179 selfloop transitions, 51 changer transitions 0/233 dead transitions. [2022-12-13 11:55:26,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 233 transitions, 3476 flow [2022-12-13 11:55:26,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 11:55:26,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 11:55:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1847 transitions. [2022-12-13 11:55:26,739 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41154188948306597 [2022-12-13 11:55:26,739 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1847 transitions. [2022-12-13 11:55:26,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1847 transitions. [2022-12-13 11:55:26,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:26,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1847 transitions. [2022-12-13 11:55:26,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 108.6470588235294) internal successors, (1847), 17 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:26,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 264.0) internal successors, (4752), 18 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:26,743 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 264.0) internal successors, (4752), 18 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:26,743 INFO L175 Difference]: Start difference. First operand has 146 places, 138 transitions, 1958 flow. Second operand 17 states and 1847 transitions. [2022-12-13 11:55:26,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 233 transitions, 3476 flow [2022-12-13 11:55:26,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 233 transitions, 3447 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-12-13 11:55:26,802 INFO L231 Difference]: Finished difference. Result has 158 places, 136 transitions, 2004 flow [2022-12-13 11:55:26,802 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2004, PETRI_PLACES=158, PETRI_TRANSITIONS=136} [2022-12-13 11:55:26,802 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 119 predicate places. [2022-12-13 11:55:26,803 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 136 transitions, 2004 flow [2022-12-13 11:55:26,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 104.38461538461539) internal successors, (2714), 26 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:26,803 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:26,803 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:26,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 11:55:27,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 11:55:27,004 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:27,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:27,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1879482079, now seen corresponding path program 2 times [2022-12-13 11:55:27,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:27,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937890067] [2022-12-13 11:55:27,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:27,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:27,289 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 11:55:27,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:27,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937890067] [2022-12-13 11:55:27,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937890067] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:27,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095027526] [2022-12-13 11:55:27,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:55:27,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:27,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:27,291 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:27,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 11:55:27,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:55:27,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:27,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 11:55:27,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:27,479 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 11:55:27,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:55:27,527 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 11:55:27,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:55:27,616 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 11:55:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:27,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:27,877 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_799 (Array Int Int)) (|v_thread1Thread1of1ForFork1_~i~0#1_116| Int)) (or (not (< |v_thread1Thread1of1ForFork1_~i~0#1_116| c_~N~0)) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_799) c_~A~0.base) (+ c_~A~0.offset (* |v_thread1Thread1of1ForFork1_~i~0#1_116| 4))) 4294967296) (< |v_thread1Thread1of1ForFork1_~i~0#1_116| 2))) is different from false [2022-12-13 11:55:27,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:27,947 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 11:55:27,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:27,956 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 11:55:27,961 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 11:55:27,967 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 11:55:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:28,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095027526] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:28,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:28,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-13 11:55:28,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569934502] [2022-12-13 11:55:28,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:28,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 11:55:28,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:28,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 11:55:28,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=665, Unknown=3, NotChecked=52, Total=812 [2022-12-13 11:55:28,299 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 264 [2022-12-13 11:55:28,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 136 transitions, 2004 flow. Second operand has 29 states, 29 states have (on average 80.34482758620689) internal successors, (2330), 29 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:28,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:28,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 264 [2022-12-13 11:55:28,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:38,426 INFO L130 PetriNetUnfolder]: 6246/10634 cut-off events. [2022-12-13 11:55:38,427 INFO L131 PetriNetUnfolder]: For 102295/103225 co-relation queries the response was YES. [2022-12-13 11:55:38,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68794 conditions, 10634 events. 6246/10634 cut-off events. For 102295/103225 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 76740 event pairs, 1318 based on Foata normal form. 1206/11448 useless extension candidates. Maximal degree in co-relation 68750. Up to 3543 conditions per place. [2022-12-13 11:55:38,497 INFO L137 encePairwiseOnDemand]: 253/264 looper letters, 753 selfloop transitions, 146 changer transitions 15/917 dead transitions. [2022-12-13 11:55:38,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 917 transitions, 12929 flow [2022-12-13 11:55:38,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 11:55:38,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-12-13 11:55:38,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4279 transitions. [2022-12-13 11:55:38,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3376736111111111 [2022-12-13 11:55:38,504 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4279 transitions. [2022-12-13 11:55:38,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4279 transitions. [2022-12-13 11:55:38,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:38,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4279 transitions. [2022-12-13 11:55:38,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 89.14583333333333) internal successors, (4279), 48 states have internal predecessors, (4279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:38,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 264.0) internal successors, (12936), 49 states have internal predecessors, (12936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:38,520 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 264.0) internal successors, (12936), 49 states have internal predecessors, (12936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:38,520 INFO L175 Difference]: Start difference. First operand has 158 places, 136 transitions, 2004 flow. Second operand 48 states and 4279 transitions. [2022-12-13 11:55:38,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 917 transitions, 12929 flow [2022-12-13 11:55:38,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 917 transitions, 12760 flow, removed 3 selfloop flow, removed 13 redundant places. [2022-12-13 11:55:38,688 INFO L231 Difference]: Finished difference. Result has 202 places, 235 transitions, 4048 flow [2022-12-13 11:55:38,688 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=4048, PETRI_PLACES=202, PETRI_TRANSITIONS=235} [2022-12-13 11:55:38,689 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 163 predicate places. [2022-12-13 11:55:38,689 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 235 transitions, 4048 flow [2022-12-13 11:55:38,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 80.34482758620689) internal successors, (2330), 29 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:38,689 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:38,689 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:38,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 11:55:38,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 11:55:38,890 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:38,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:38,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2031413973, now seen corresponding path program 2 times [2022-12-13 11:55:38,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:38,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999182942] [2022-12-13 11:55:38,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:38,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:39,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:39,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999182942] [2022-12-13 11:55:39,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999182942] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:39,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840448193] [2022-12-13 11:55:39,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:55:39,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:39,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:39,023 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:39,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 11:55:39,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:55:39,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:39,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:55:39,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:39,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:39,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840448193] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:39,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:39,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 11:55:39,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114461274] [2022-12-13 11:55:39,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:39,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 11:55:39,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:39,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 11:55:39,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-12-13 11:55:39,378 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 264 [2022-12-13 11:55:39,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 235 transitions, 4048 flow. Second operand has 19 states, 19 states have (on average 106.57894736842105) internal successors, (2025), 19 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:39,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:39,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 264 [2022-12-13 11:55:39,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:41,056 INFO L130 PetriNetUnfolder]: 6232/10591 cut-off events. [2022-12-13 11:55:41,056 INFO L131 PetriNetUnfolder]: For 143084/143483 co-relation queries the response was YES. [2022-12-13 11:55:41,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73129 conditions, 10591 events. 6232/10591 cut-off events. For 143084/143483 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 74680 event pairs, 2796 based on Foata normal form. 479/11062 useless extension candidates. Maximal degree in co-relation 73074. Up to 8030 conditions per place. [2022-12-13 11:55:41,115 INFO L137 encePairwiseOnDemand]: 256/264 looper letters, 258 selfloop transitions, 10 changer transitions 93/367 dead transitions. [2022-12-13 11:55:41,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 367 transitions, 6975 flow [2022-12-13 11:55:41,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 11:55:41,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 11:55:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1122 transitions. [2022-12-13 11:55:41,117 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.425 [2022-12-13 11:55:41,117 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1122 transitions. [2022-12-13 11:55:41,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1122 transitions. [2022-12-13 11:55:41,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:41,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1122 transitions. [2022-12-13 11:55:41,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 112.2) internal successors, (1122), 10 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:41,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 264.0) internal successors, (2904), 11 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:41,120 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 264.0) internal successors, (2904), 11 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:41,120 INFO L175 Difference]: Start difference. First operand has 202 places, 235 transitions, 4048 flow. Second operand 10 states and 1122 transitions. [2022-12-13 11:55:41,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 367 transitions, 6975 flow [2022-12-13 11:55:41,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 367 transitions, 6059 flow, removed 53 selfloop flow, removed 17 redundant places. [2022-12-13 11:55:41,377 INFO L231 Difference]: Finished difference. Result has 194 places, 195 transitions, 2939 flow [2022-12-13 11:55:41,377 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=3419, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2939, PETRI_PLACES=194, PETRI_TRANSITIONS=195} [2022-12-13 11:55:41,377 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 155 predicate places. [2022-12-13 11:55:41,377 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 195 transitions, 2939 flow [2022-12-13 11:55:41,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.57894736842105) internal successors, (2025), 19 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:41,378 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:41,378 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:41,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 11:55:41,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:41,579 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:41,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:41,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1611697382, now seen corresponding path program 2 times [2022-12-13 11:55:41,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:41,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867670658] [2022-12-13 11:55:41,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:41,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:41,868 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 11:55:41,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:41,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867670658] [2022-12-13 11:55:41,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867670658] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:41,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909849162] [2022-12-13 11:55:41,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:55:41,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:41,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:41,870 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:41,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 11:55:42,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:55:42,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:42,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 11:55:42,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:42,076 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 11:55:42,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:55:42,119 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 11:55:42,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:55:42,151 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 11:55:42,245 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 11:55:42,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:42,358 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_875 (Array Int Int)) (v_ArrVal_874 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_874) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_875) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2022-12-13 11:55:42,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:42,365 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 11:55:42,370 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:42,370 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 159 treesize of output 149 [2022-12-13 11:55:42,373 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 134 treesize of output 118 [2022-12-13 11:55:42,377 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 118 treesize of output 110 [2022-12-13 11:55:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-12-13 11:55:42,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909849162] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:42,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:42,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-13 11:55:42,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043259275] [2022-12-13 11:55:42,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:42,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 11:55:42,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:42,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 11:55:42,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=4, NotChecked=52, Total=812 [2022-12-13 11:55:42,540 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 11:55:42,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 195 transitions, 2939 flow. Second operand has 29 states, 29 states have (on average 89.34482758620689) internal successors, (2591), 29 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:42,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:42,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 11:55:42,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:44,880 INFO L130 PetriNetUnfolder]: 5126/8781 cut-off events. [2022-12-13 11:55:44,880 INFO L131 PetriNetUnfolder]: For 100889/101612 co-relation queries the response was YES. [2022-12-13 11:55:44,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58195 conditions, 8781 events. 5126/8781 cut-off events. For 100889/101612 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 62397 event pairs, 1505 based on Foata normal form. 1365/10134 useless extension candidates. Maximal degree in co-relation 58145. Up to 2834 conditions per place. [2022-12-13 11:55:44,942 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 273 selfloop transitions, 115 changer transitions 0/390 dead transitions. [2022-12-13 11:55:44,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 390 transitions, 5971 flow [2022-12-13 11:55:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 11:55:44,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 11:55:44,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1347 transitions. [2022-12-13 11:55:44,944 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36444805194805197 [2022-12-13 11:55:44,944 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1347 transitions. [2022-12-13 11:55:44,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1347 transitions. [2022-12-13 11:55:44,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:44,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1347 transitions. [2022-12-13 11:55:44,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 96.21428571428571) internal successors, (1347), 14 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:44,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 264.0) internal successors, (3960), 15 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:44,947 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 264.0) internal successors, (3960), 15 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:44,947 INFO L175 Difference]: Start difference. First operand has 194 places, 195 transitions, 2939 flow. Second operand 14 states and 1347 transitions. [2022-12-13 11:55:44,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 390 transitions, 5971 flow [2022-12-13 11:55:45,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 390 transitions, 5422 flow, removed 43 selfloop flow, removed 22 redundant places. [2022-12-13 11:55:45,236 INFO L231 Difference]: Finished difference. Result has 165 places, 199 transitions, 2894 flow [2022-12-13 11:55:45,236 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=2474, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2894, PETRI_PLACES=165, PETRI_TRANSITIONS=199} [2022-12-13 11:55:45,236 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 126 predicate places. [2022-12-13 11:55:45,237 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 199 transitions, 2894 flow [2022-12-13 11:55:45,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 89.34482758620689) internal successors, (2591), 29 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:45,237 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:45,237 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 11:55:45,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 11:55:45,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:45,438 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:45,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:45,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1996217576, now seen corresponding path program 5 times [2022-12-13 11:55:45,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:45,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572210336] [2022-12-13 11:55:45,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:45,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:45,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:45,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572210336] [2022-12-13 11:55:45,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572210336] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:45,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136048802] [2022-12-13 11:55:45,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:55:45,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:45,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:45,582 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:45,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 11:55:45,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 11:55:45,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:45,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:55:45,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:45,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:45,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136048802] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:45,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:45,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-12-13 11:55:45,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123119049] [2022-12-13 11:55:45,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:45,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 11:55:45,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:45,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 11:55:45,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2022-12-13 11:55:46,095 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 264 [2022-12-13 11:55:46,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 199 transitions, 2894 flow. Second operand has 24 states, 24 states have (on average 106.45833333333333) internal successors, (2555), 24 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:46,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:46,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 264 [2022-12-13 11:55:46,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:55:47,605 INFO L130 PetriNetUnfolder]: 4792/8213 cut-off events. [2022-12-13 11:55:47,605 INFO L131 PetriNetUnfolder]: For 82184/82931 co-relation queries the response was YES. [2022-12-13 11:55:47,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52966 conditions, 8213 events. 4792/8213 cut-off events. For 82184/82931 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 57804 event pairs, 2046 based on Foata normal form. 835/8758 useless extension candidates. Maximal degree in co-relation 52922. Up to 5031 conditions per place. [2022-12-13 11:55:47,663 INFO L137 encePairwiseOnDemand]: 256/264 looper letters, 287 selfloop transitions, 40 changer transitions 27/356 dead transitions. [2022-12-13 11:55:47,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 356 transitions, 5047 flow [2022-12-13 11:55:47,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 11:55:47,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 11:55:47,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1708 transitions. [2022-12-13 11:55:47,666 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4313131313131313 [2022-12-13 11:55:47,666 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1708 transitions. [2022-12-13 11:55:47,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1708 transitions. [2022-12-13 11:55:47,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:55:47,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1708 transitions. [2022-12-13 11:55:47,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 113.86666666666666) internal successors, (1708), 15 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:47,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 264.0) internal successors, (4224), 16 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:47,672 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 264.0) internal successors, (4224), 16 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:47,672 INFO L175 Difference]: Start difference. First operand has 165 places, 199 transitions, 2894 flow. Second operand 15 states and 1708 transitions. [2022-12-13 11:55:47,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 356 transitions, 5047 flow [2022-12-13 11:55:47,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 356 transitions, 4800 flow, removed 5 selfloop flow, removed 11 redundant places. [2022-12-13 11:55:47,824 INFO L231 Difference]: Finished difference. Result has 168 places, 187 transitions, 2542 flow [2022-12-13 11:55:47,825 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=2480, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2542, PETRI_PLACES=168, PETRI_TRANSITIONS=187} [2022-12-13 11:55:47,825 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 129 predicate places. [2022-12-13 11:55:47,825 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 187 transitions, 2542 flow [2022-12-13 11:55:47,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 106.45833333333333) internal successors, (2555), 24 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:47,826 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:55:47,826 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:47,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 11:55:48,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:48,027 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:55:48,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:48,027 INFO L85 PathProgramCache]: Analyzing trace with hash 828232841, now seen corresponding path program 3 times [2022-12-13 11:55:48,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:48,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267707182] [2022-12-13 11:55:48,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:48,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:48,251 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 11:55:48,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:48,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267707182] [2022-12-13 11:55:48,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267707182] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:48,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614990550] [2022-12-13 11:55:48,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:55:48,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:48,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:48,252 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:48,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 11:55:48,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 11:55:48,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:48,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 11:55:48,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:48,451 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 11:55:48,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:55:48,501 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 11:55:48,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:55:48,548 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 11:55:48,708 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 11:55:48,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:48,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:48,993 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 11:55:49,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:49,001 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 11:55:49,006 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 11:55:49,010 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 11:55:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:49,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614990550] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:49,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:49,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-13 11:55:49,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356529561] [2022-12-13 11:55:49,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:49,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 11:55:49,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:49,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 11:55:49,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=715, Unknown=1, NotChecked=0, Total=812 [2022-12-13 11:55:50,905 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 264 [2022-12-13 11:55:50,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 187 transitions, 2542 flow. Second operand has 29 states, 29 states have (on average 80.44827586206897) internal successors, (2333), 29 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:55:50,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:55:50,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 264 [2022-12-13 11:55:50,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:16,386 INFO L130 PetriNetUnfolder]: 6310/10637 cut-off events. [2022-12-13 11:56:16,387 INFO L131 PetriNetUnfolder]: For 92292/92736 co-relation queries the response was YES. [2022-12-13 11:56:16,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68198 conditions, 10637 events. 6310/10637 cut-off events. For 92292/92736 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 74314 event pairs, 642 based on Foata normal form. 916/11109 useless extension candidates. Maximal degree in co-relation 68155. Up to 3616 conditions per place. [2022-12-13 11:56:16,440 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 780 selfloop transitions, 54 changer transitions 32/872 dead transitions. [2022-12-13 11:56:16,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 872 transitions, 13101 flow [2022-12-13 11:56:16,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 11:56:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 11:56:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2902 transitions. [2022-12-13 11:56:16,443 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33310376492194677 [2022-12-13 11:56:16,444 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2902 transitions. [2022-12-13 11:56:16,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2902 transitions. [2022-12-13 11:56:16,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:16,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2902 transitions. [2022-12-13 11:56:16,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 87.93939393939394) internal successors, (2902), 33 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:16,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 264.0) internal successors, (8976), 34 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:16,451 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 264.0) internal successors, (8976), 34 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:16,451 INFO L175 Difference]: Start difference. First operand has 168 places, 187 transitions, 2542 flow. Second operand 33 states and 2902 transitions. [2022-12-13 11:56:16,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 872 transitions, 13101 flow [2022-12-13 11:56:16,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 872 transitions, 12902 flow, removed 41 selfloop flow, removed 9 redundant places. [2022-12-13 11:56:16,636 INFO L231 Difference]: Finished difference. Result has 197 places, 210 transitions, 2954 flow [2022-12-13 11:56:16,636 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=2479, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2954, PETRI_PLACES=197, PETRI_TRANSITIONS=210} [2022-12-13 11:56:16,636 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 158 predicate places. [2022-12-13 11:56:16,636 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 210 transitions, 2954 flow [2022-12-13 11:56:16,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 80.44827586206897) internal successors, (2333), 29 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:16,636 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:16,636 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 11:56:16,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 11:56:16,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 11:56:16,837 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:56:16,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:16,838 INFO L85 PathProgramCache]: Analyzing trace with hash 753487738, now seen corresponding path program 6 times [2022-12-13 11:56:16,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:16,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715142736] [2022-12-13 11:56:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:16,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:17,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:17,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715142736] [2022-12-13 11:56:17,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715142736] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:56:17,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211947681] [2022-12-13 11:56:17,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:56:17,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:56:17,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:56:17,147 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:56:17,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 11:56:17,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 11:56:17,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:56:17,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 11:56:17,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:17,370 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 11:56:17,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:17,403 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 11:56:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:17,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:56:17,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:17,656 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 26 treesize of output 27 [2022-12-13 11:56:17,661 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:17,662 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 43 treesize of output 39 [2022-12-13 11:56:17,672 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 9 treesize of output 5 [2022-12-13 11:56:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:17,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211947681] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:56:17,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:56:17,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-12-13 11:56:17,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488998189] [2022-12-13 11:56:17,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:56:17,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 11:56:17,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:17,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 11:56:17,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=775, Unknown=4, NotChecked=0, Total=870 [2022-12-13 11:56:18,833 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 264 [2022-12-13 11:56:18,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 210 transitions, 2954 flow. Second operand has 30 states, 30 states have (on average 103.4) internal successors, (3102), 30 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:18,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:18,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 264 [2022-12-13 11:56:18,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:21,235 INFO L130 PetriNetUnfolder]: 6203/10461 cut-off events. [2022-12-13 11:56:21,235 INFO L131 PetriNetUnfolder]: For 101661/102368 co-relation queries the response was YES. [2022-12-13 11:56:21,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71798 conditions, 10461 events. 6203/10461 cut-off events. For 101661/102368 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 72830 event pairs, 2323 based on Foata normal form. 711/10886 useless extension candidates. Maximal degree in co-relation 71750. Up to 6252 conditions per place. [2022-12-13 11:56:21,290 INFO L137 encePairwiseOnDemand]: 253/264 looper letters, 238 selfloop transitions, 102 changer transitions 0/343 dead transitions. [2022-12-13 11:56:21,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 343 transitions, 5391 flow [2022-12-13 11:56:21,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 11:56:21,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 11:56:21,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2143 transitions. [2022-12-13 11:56:21,293 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40587121212121213 [2022-12-13 11:56:21,293 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2143 transitions. [2022-12-13 11:56:21,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2143 transitions. [2022-12-13 11:56:21,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:21,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2143 transitions. [2022-12-13 11:56:21,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 107.15) internal successors, (2143), 20 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:21,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 264.0) internal successors, (5544), 21 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:21,297 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 264.0) internal successors, (5544), 21 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:21,297 INFO L175 Difference]: Start difference. First operand has 197 places, 210 transitions, 2954 flow. Second operand 20 states and 2143 transitions. [2022-12-13 11:56:21,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 343 transitions, 5391 flow [2022-12-13 11:56:21,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 343 transitions, 5049 flow, removed 31 selfloop flow, removed 17 redundant places. [2022-12-13 11:56:21,576 INFO L231 Difference]: Finished difference. Result has 204 places, 227 transitions, 3246 flow [2022-12-13 11:56:21,576 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=2795, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3246, PETRI_PLACES=204, PETRI_TRANSITIONS=227} [2022-12-13 11:56:21,576 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 165 predicate places. [2022-12-13 11:56:21,576 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 227 transitions, 3246 flow [2022-12-13 11:56:21,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 103.4) internal successors, (3102), 30 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:21,577 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:21,577 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:56:21,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 11:56:21,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 11:56:21,778 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:56:21,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:21,779 INFO L85 PathProgramCache]: Analyzing trace with hash -717029142, now seen corresponding path program 3 times [2022-12-13 11:56:21,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:21,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092973137] [2022-12-13 11:56:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:21,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:22,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:22,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092973137] [2022-12-13 11:56:22,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092973137] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:56:22,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799424622] [2022-12-13 11:56:22,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:56:22,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:56:22,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:56:22,150 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:56:22,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 11:56:22,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 11:56:22,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:56:22,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 11:56:22,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:22,363 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 11:56:22,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:22,399 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 25 treesize of output 24 [2022-12-13 11:56:22,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:22,434 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 16 treesize of output 18 [2022-12-13 11:56:22,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:22,466 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 16 treesize of output 18 [2022-12-13 11:56:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:22,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:56:22,776 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 11:56:22,776 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 34 treesize of output 40 [2022-12-13 11:56:22,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:22,782 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 71 treesize of output 67 [2022-12-13 11:56:22,786 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 28 treesize of output 24 [2022-12-13 11:56:22,788 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 50 treesize of output 42 [2022-12-13 11:56:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:22,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799424622] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:56:22,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:56:22,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-12-13 11:56:22,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983738675] [2022-12-13 11:56:22,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:56:22,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 11:56:22,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:22,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 11:56:22,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=757, Unknown=14, NotChecked=0, Total=870 [2022-12-13 11:56:25,039 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 11:56:25,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 11:56:25,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 227 transitions, 3246 flow. Second operand has 30 states, 30 states have (on average 89.4) internal successors, (2682), 30 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:25,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:25,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 11:56:25,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:27,507 INFO L130 PetriNetUnfolder]: 5541/9505 cut-off events. [2022-12-13 11:56:27,507 INFO L131 PetriNetUnfolder]: For 93401/93607 co-relation queries the response was YES. [2022-12-13 11:56:27,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63310 conditions, 9505 events. 5541/9505 cut-off events. For 93401/93607 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 66272 event pairs, 1044 based on Foata normal form. 936/10194 useless extension candidates. Maximal degree in co-relation 63258. Up to 3072 conditions per place. [2022-12-13 11:56:27,558 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 631 selfloop transitions, 50 changer transitions 0/687 dead transitions. [2022-12-13 11:56:27,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 687 transitions, 11526 flow [2022-12-13 11:56:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 11:56:27,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 11:56:27,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1341 transitions. [2022-12-13 11:56:27,560 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3628246753246753 [2022-12-13 11:56:27,560 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1341 transitions. [2022-12-13 11:56:27,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1341 transitions. [2022-12-13 11:56:27,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:27,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1341 transitions. [2022-12-13 11:56:27,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 95.78571428571429) internal successors, (1341), 14 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:27,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 264.0) internal successors, (3960), 15 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:27,563 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 264.0) internal successors, (3960), 15 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:27,563 INFO L175 Difference]: Start difference. First operand has 204 places, 227 transitions, 3246 flow. Second operand 14 states and 1341 transitions. [2022-12-13 11:56:27,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 687 transitions, 11526 flow [2022-12-13 11:56:27,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 687 transitions, 11445 flow, removed 35 selfloop flow, removed 5 redundant places. [2022-12-13 11:56:27,761 INFO L231 Difference]: Finished difference. Result has 214 places, 229 transitions, 3392 flow [2022-12-13 11:56:27,761 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=3202, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3392, PETRI_PLACES=214, PETRI_TRANSITIONS=229} [2022-12-13 11:56:27,761 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 175 predicate places. [2022-12-13 11:56:27,761 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 229 transitions, 3392 flow [2022-12-13 11:56:27,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 89.4) internal successors, (2682), 30 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:27,762 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:27,762 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 11:56:27,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-13 11:56:27,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:56:27,963 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:56:27,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:27,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1994497202, now seen corresponding path program 3 times [2022-12-13 11:56:27,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:27,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756116657] [2022-12-13 11:56:27,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:27,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:28,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:28,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756116657] [2022-12-13 11:56:28,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756116657] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:56:28,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387490934] [2022-12-13 11:56:28,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:56:28,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:56:28,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:56:28,299 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:56:28,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 11:56:28,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 11:56:28,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:56:28,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 11:56:28,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:28,608 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 11:56:28,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:28,669 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 20 treesize of output 22 [2022-12-13 11:56:28,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:28,723 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 11:56:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:28,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:56:29,131 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_thread1Thread1of1ForFork1_~i~0#1_148| Int) (v_ArrVal_1086 (Array Int Int))) (or (< |v_thread1Thread1of1ForFork1_~i~0#1_148| 3) (not (< |v_thread1Thread1of1ForFork1_~i~0#1_148| c_~N~0)) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1086) c_~A~0.base) (+ c_~A~0.offset (* |v_thread1Thread1of1ForFork1_~i~0#1_148| 4))) 9223372039002259456)))) is different from false [2022-12-13 11:56:29,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:29,202 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 11:56:29,210 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:29,210 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 175 treesize of output 163 [2022-12-13 11:56:29,216 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 73 treesize of output 61 [2022-12-13 11:56:29,221 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 134 treesize of output 110 [2022-12-13 11:56:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:29,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387490934] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:56:29,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:56:29,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-13 11:56:29,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409093939] [2022-12-13 11:56:29,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:56:29,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 11:56:29,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:29,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 11:56:29,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=995, Unknown=1, NotChecked=64, Total=1190 [2022-12-13 11:56:29,683 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 264 [2022-12-13 11:56:29,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 229 transitions, 3392 flow. Second operand has 35 states, 35 states have (on average 80.37142857142857) internal successors, (2813), 35 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:29,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:29,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 264 [2022-12-13 11:56:29,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:44,314 INFO L130 PetriNetUnfolder]: 8639/14721 cut-off events. [2022-12-13 11:56:44,314 INFO L131 PetriNetUnfolder]: For 170927/172263 co-relation queries the response was YES. [2022-12-13 11:56:44,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104893 conditions, 14721 events. 8639/14721 cut-off events. For 170927/172263 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 109296 event pairs, 1451 based on Foata normal form. 1735/16084 useless extension candidates. Maximal degree in co-relation 104839. Up to 4772 conditions per place. [2022-12-13 11:56:44,455 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 984 selfloop transitions, 175 changer transitions 30/1192 dead transitions. [2022-12-13 11:56:44,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 1192 transitions, 18696 flow [2022-12-13 11:56:44,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 11:56:44,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-12-13 11:56:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4797 transitions. [2022-12-13 11:56:44,462 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.336489898989899 [2022-12-13 11:56:44,462 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4797 transitions. [2022-12-13 11:56:44,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4797 transitions. [2022-12-13 11:56:44,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:44,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4797 transitions. [2022-12-13 11:56:44,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 88.83333333333333) internal successors, (4797), 54 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:44,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 264.0) internal successors, (14520), 55 states have internal predecessors, (14520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:44,480 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 264.0) internal successors, (14520), 55 states have internal predecessors, (14520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:44,480 INFO L175 Difference]: Start difference. First operand has 214 places, 229 transitions, 3392 flow. Second operand 54 states and 4797 transitions. [2022-12-13 11:56:44,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 1192 transitions, 18696 flow [2022-12-13 11:56:44,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 1192 transitions, 17627 flow, removed 12 selfloop flow, removed 12 redundant places. [2022-12-13 11:56:44,963 INFO L231 Difference]: Finished difference. Result has 263 places, 283 transitions, 4677 flow [2022-12-13 11:56:44,964 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=3236, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=4677, PETRI_PLACES=263, PETRI_TRANSITIONS=283} [2022-12-13 11:56:44,964 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 224 predicate places. [2022-12-13 11:56:44,964 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 283 transitions, 4677 flow [2022-12-13 11:56:44,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 80.37142857142857) internal successors, (2813), 35 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:44,964 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:44,964 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 11:56:44,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 11:56:45,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:56:45,165 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:56:45,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:45,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1994497203, now seen corresponding path program 3 times [2022-12-13 11:56:45,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:45,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104560534] [2022-12-13 11:56:45,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:45,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:45,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:45,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104560534] [2022-12-13 11:56:45,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104560534] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:56:45,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228928558] [2022-12-13 11:56:45,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:56:45,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:56:45,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:56:45,473 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:56:45,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 11:56:45,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 11:56:45,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:56:45,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 11:56:45,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:45,769 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 11:56:45,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:45,817 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 11:56:45,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:45,864 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 11:56:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:46,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:56:46,258 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1132 (Array Int Int)) (|v_thread1Thread1of1ForFork1_~i~0#1_156| Int)) (or (not (< |v_thread1Thread1of1ForFork1_~i~0#1_156| c_~N~0)) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1132) c_~A~0.base) (+ c_~A~0.offset (* |v_thread1Thread1of1ForFork1_~i~0#1_156| 4))) 4294967296) (< |v_thread1Thread1of1ForFork1_~i~0#1_156| 3))) is different from false [2022-12-13 11:56:46,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:46,344 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 11:56:46,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:46,352 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 11:56:46,356 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 11:56:46,361 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 11:56:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:46,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228928558] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:56:46,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:56:46,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-13 11:56:46,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535826357] [2022-12-13 11:56:46,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:56:46,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 11:56:46,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:46,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 11:56:46,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=995, Unknown=1, NotChecked=64, Total=1190 [2022-12-13 11:56:46,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 264 [2022-12-13 11:56:46,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 283 transitions, 4677 flow. Second operand has 35 states, 35 states have (on average 80.37142857142857) internal successors, (2813), 35 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:46,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:46,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 264 [2022-12-13 11:56:46,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:00,332 INFO L130 PetriNetUnfolder]: 8277/14207 cut-off events. [2022-12-13 11:57:00,332 INFO L131 PetriNetUnfolder]: For 181211/182514 co-relation queries the response was YES. [2022-12-13 11:57:00,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102150 conditions, 14207 events. 8277/14207 cut-off events. For 181211/182514 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 105954 event pairs, 1354 based on Foata normal form. 1593/15798 useless extension candidates. Maximal degree in co-relation 102090. Up to 4716 conditions per place. [2022-12-13 11:57:00,420 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 976 selfloop transitions, 172 changer transitions 30/1181 dead transitions. [2022-12-13 11:57:00,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 1181 transitions, 17946 flow [2022-12-13 11:57:00,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 11:57:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-12-13 11:57:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4791 transitions. [2022-12-13 11:57:00,424 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3360690235690236 [2022-12-13 11:57:00,424 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4791 transitions. [2022-12-13 11:57:00,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4791 transitions. [2022-12-13 11:57:00,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:00,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4791 transitions. [2022-12-13 11:57:00,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 88.72222222222223) internal successors, (4791), 54 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:00,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 264.0) internal successors, (14520), 55 states have internal predecessors, (14520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:00,435 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 264.0) internal successors, (14520), 55 states have internal predecessors, (14520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:00,435 INFO L175 Difference]: Start difference. First operand has 263 places, 283 transitions, 4677 flow. Second operand 54 states and 4791 transitions. [2022-12-13 11:57:00,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 1181 transitions, 17946 flow [2022-12-13 11:57:00,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 1181 transitions, 17428 flow, removed 17 selfloop flow, removed 28 redundant places. [2022-12-13 11:57:00,921 INFO L231 Difference]: Finished difference. Result has 288 places, 277 transitions, 4420 flow [2022-12-13 11:57:00,921 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=4076, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=4420, PETRI_PLACES=288, PETRI_TRANSITIONS=277} [2022-12-13 11:57:00,921 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 249 predicate places. [2022-12-13 11:57:00,921 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 277 transitions, 4420 flow [2022-12-13 11:57:00,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 80.37142857142857) internal successors, (2813), 35 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:00,921 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:00,922 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:00,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 11:57:01,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 11:57:01,122 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:57:01,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:01,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1870210544, now seen corresponding path program 4 times [2022-12-13 11:57:01,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:01,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438708552] [2022-12-13 11:57:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:01,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:01,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:01,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438708552] [2022-12-13 11:57:01,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438708552] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:01,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662076419] [2022-12-13 11:57:01,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:57:01,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:01,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:01,423 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:01,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 11:57:01,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:57:01,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:57:01,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 11:57:01,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:01,631 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 15 treesize of output 11 [2022-12-13 11:57:01,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:57:01,690 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 11:57:01,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:57:01,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 11:57:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:01,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:02,189 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_thread2Thread1of1ForFork0_~i~1#1_96| Int) (v_ArrVal_1178 (Array Int Int))) (or (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1178) c_~A~0.base) (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork0_~i~1#1_96| 4))) 9223372039002259456) (< |v_thread2Thread1of1ForFork0_~i~1#1_96| 3) (not (< |v_thread2Thread1of1ForFork0_~i~1#1_96| c_~N~0)))) is different from false [2022-12-13 11:57:02,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:57:02,276 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 11:57:02,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:57:02,285 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 11:57:02,290 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 11:57:02,294 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 106 treesize of output 94 [2022-12-13 11:57:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:02,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662076419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:02,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:02,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-13 11:57:02,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118475556] [2022-12-13 11:57:02,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:02,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 11:57:02,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:02,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 11:57:02,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=995, Unknown=1, NotChecked=64, Total=1190 [2022-12-13 11:57:02,853 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 264 [2022-12-13 11:57:02,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 277 transitions, 4420 flow. Second operand has 35 states, 35 states have (on average 80.45714285714286) internal successors, (2816), 35 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:02,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:02,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 264 [2022-12-13 11:57:02,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:12,703 INFO L130 PetriNetUnfolder]: 10215/17417 cut-off events. [2022-12-13 11:57:12,704 INFO L131 PetriNetUnfolder]: For 212572/213102 co-relation queries the response was YES. [2022-12-13 11:57:12,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125547 conditions, 17417 events. 10215/17417 cut-off events. For 212572/213102 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 128598 event pairs, 908 based on Foata normal form. 1244/18661 useless extension candidates. Maximal degree in co-relation 125491. Up to 5886 conditions per place. [2022-12-13 11:57:12,845 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 1348 selfloop transitions, 82 changer transitions 65/1503 dead transitions. [2022-12-13 11:57:12,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1503 transitions, 26764 flow [2022-12-13 11:57:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 11:57:12,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-13 11:57:12,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4554 transitions. [2022-12-13 11:57:12,851 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3317307692307692 [2022-12-13 11:57:12,851 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4554 transitions. [2022-12-13 11:57:12,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4554 transitions. [2022-12-13 11:57:12,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:12,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4554 transitions. [2022-12-13 11:57:12,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 87.57692307692308) internal successors, (4554), 52 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:12,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 264.0) internal successors, (13992), 53 states have internal predecessors, (13992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:12,867 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 264.0) internal successors, (13992), 53 states have internal predecessors, (13992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:12,867 INFO L175 Difference]: Start difference. First operand has 288 places, 277 transitions, 4420 flow. Second operand 52 states and 4554 transitions. [2022-12-13 11:57:12,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1503 transitions, 26764 flow [2022-12-13 11:57:13,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1503 transitions, 25404 flow, removed 34 selfloop flow, removed 38 redundant places. [2022-12-13 11:57:13,507 INFO L231 Difference]: Finished difference. Result has 308 places, 305 transitions, 4783 flow [2022-12-13 11:57:13,507 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=4139, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=4783, PETRI_PLACES=308, PETRI_TRANSITIONS=305} [2022-12-13 11:57:13,508 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 269 predicate places. [2022-12-13 11:57:13,508 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 305 transitions, 4783 flow [2022-12-13 11:57:13,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 80.45714285714286) internal successors, (2816), 35 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:13,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:13,508 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:13,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-13 11:57:13,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 11:57:13,709 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:57:13,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:13,710 INFO L85 PathProgramCache]: Analyzing trace with hash -701723934, now seen corresponding path program 1 times [2022-12-13 11:57:13,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:13,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281172661] [2022-12-13 11:57:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:13,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:57:13,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:13,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281172661] [2022-12-13 11:57:13,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281172661] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:13,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39706292] [2022-12-13 11:57:13,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:13,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:13,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:13,796 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:13,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 11:57:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:13,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:57:13,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:13,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:14,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39706292] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:14,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:14,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 23 [2022-12-13 11:57:14,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454458730] [2022-12-13 11:57:14,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:14,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 11:57:14,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:14,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 11:57:14,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2022-12-13 11:57:14,234 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 264 [2022-12-13 11:57:14,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 305 transitions, 4783 flow. Second operand has 23 states, 23 states have (on average 106.95652173913044) internal successors, (2460), 23 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:14,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:14,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 264 [2022-12-13 11:57:14,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:17,811 INFO L130 PetriNetUnfolder]: 9948/17150 cut-off events. [2022-12-13 11:57:17,812 INFO L131 PetriNetUnfolder]: For 234573/235096 co-relation queries the response was YES. [2022-12-13 11:57:17,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130006 conditions, 17150 events. 9948/17150 cut-off events. For 234573/235096 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 129361 event pairs, 1974 based on Foata normal form. 943/18087 useless extension candidates. Maximal degree in co-relation 129946. Up to 5660 conditions per place. [2022-12-13 11:57:17,958 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 873 selfloop transitions, 54 changer transitions 213/1146 dead transitions. [2022-12-13 11:57:17,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 1146 transitions, 20678 flow [2022-12-13 11:57:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 11:57:17,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 11:57:17,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2275 transitions. [2022-12-13 11:57:17,961 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4308712121212121 [2022-12-13 11:57:17,961 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2275 transitions. [2022-12-13 11:57:17,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2275 transitions. [2022-12-13 11:57:17,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:17,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2275 transitions. [2022-12-13 11:57:17,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 113.75) internal successors, (2275), 20 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:17,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 264.0) internal successors, (5544), 21 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:17,967 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 264.0) internal successors, (5544), 21 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:17,968 INFO L175 Difference]: Start difference. First operand has 308 places, 305 transitions, 4783 flow. Second operand 20 states and 2275 transitions. [2022-12-13 11:57:17,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 1146 transitions, 20678 flow [2022-12-13 11:57:18,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 1146 transitions, 20303 flow, removed 21 selfloop flow, removed 34 redundant places. [2022-12-13 11:57:18,631 INFO L231 Difference]: Finished difference. Result has 294 places, 258 transitions, 3991 flow [2022-12-13 11:57:18,632 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=4382, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3991, PETRI_PLACES=294, PETRI_TRANSITIONS=258} [2022-12-13 11:57:18,632 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 255 predicate places. [2022-12-13 11:57:18,632 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 258 transitions, 3991 flow [2022-12-13 11:57:18,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 106.95652173913044) internal successors, (2460), 23 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:18,632 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:18,632 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:18,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 11:57:18,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:18,833 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:57:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:18,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1699871771, now seen corresponding path program 1 times [2022-12-13 11:57:18,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:18,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016584103] [2022-12-13 11:57:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:18,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:57:18,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:18,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016584103] [2022-12-13 11:57:18,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016584103] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:18,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217711618] [2022-12-13 11:57:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:18,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:18,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:18,879 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:18,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 11:57:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:19,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:57:19,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:57:19,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:57:19,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217711618] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:19,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:19,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 11:57:19,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875694734] [2022-12-13 11:57:19,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:19,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 11:57:19,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:19,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 11:57:19,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-12-13 11:57:19,057 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 264 [2022-12-13 11:57:19,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 258 transitions, 3991 flow. Second operand has 11 states, 11 states have (on average 117.36363636363636) internal successors, (1291), 11 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:19,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:19,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 264 [2022-12-13 11:57:19,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:24,252 INFO L130 PetriNetUnfolder]: 17561/29471 cut-off events. [2022-12-13 11:57:24,253 INFO L131 PetriNetUnfolder]: For 421776/423684 co-relation queries the response was YES. [2022-12-13 11:57:24,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219961 conditions, 29471 events. 17561/29471 cut-off events. For 421776/423684 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 224373 event pairs, 4788 based on Foata normal form. 3865/33314 useless extension candidates. Maximal degree in co-relation 219904. Up to 9730 conditions per place. [2022-12-13 11:57:24,481 INFO L137 encePairwiseOnDemand]: 260/264 looper letters, 844 selfloop transitions, 161 changer transitions 0/1008 dead transitions. [2022-12-13 11:57:24,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 1008 transitions, 17425 flow [2022-12-13 11:57:24,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 11:57:24,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 11:57:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1437 transitions. [2022-12-13 11:57:24,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49483471074380164 [2022-12-13 11:57:24,483 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1437 transitions. [2022-12-13 11:57:24,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1437 transitions. [2022-12-13 11:57:24,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:24,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1437 transitions. [2022-12-13 11:57:24,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 130.63636363636363) internal successors, (1437), 11 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:24,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 264.0) internal successors, (3168), 12 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:24,486 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 264.0) internal successors, (3168), 12 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:24,486 INFO L175 Difference]: Start difference. First operand has 294 places, 258 transitions, 3991 flow. Second operand 11 states and 1437 transitions. [2022-12-13 11:57:24,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 1008 transitions, 17425 flow [2022-12-13 11:57:26,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 1008 transitions, 16576 flow, removed 75 selfloop flow, removed 21 redundant places. [2022-12-13 11:57:26,279 INFO L231 Difference]: Finished difference. Result has 253 places, 342 transitions, 6062 flow [2022-12-13 11:57:26,279 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=3688, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6062, PETRI_PLACES=253, PETRI_TRANSITIONS=342} [2022-12-13 11:57:26,279 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 214 predicate places. [2022-12-13 11:57:26,279 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 342 transitions, 6062 flow [2022-12-13 11:57:26,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 117.36363636363636) internal successors, (1291), 11 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:26,279 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:26,279 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:26,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-13 11:57:26,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 11:57:26,480 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:57:26,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:26,481 INFO L85 PathProgramCache]: Analyzing trace with hash 984529519, now seen corresponding path program 4 times [2022-12-13 11:57:26,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:26,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844477100] [2022-12-13 11:57:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:26,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:26,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:26,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844477100] [2022-12-13 11:57:26,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844477100] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:26,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723770391] [2022-12-13 11:57:26,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:57:26,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:26,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:26,851 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:26,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 11:57:26,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:57:26,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:57:26,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 11:57:26,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:27,091 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 11:57:27,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:57:27,123 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 27 treesize of output 26 [2022-12-13 11:57:27,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:57:27,164 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 18 treesize of output 20 [2022-12-13 11:57:27,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:57:27,195 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 11:57:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:27,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:27,529 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 11:57:27,530 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2022-12-13 11:57:27,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:57:27,535 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 159 treesize of output 149 [2022-12-13 11:57:27,538 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 134 treesize of output 126 [2022-12-13 11:57:27,542 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 126 treesize of output 110 [2022-12-13 11:57:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:27,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723770391] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:27,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:27,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2022-12-13 11:57:27,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130537598] [2022-12-13 11:57:27,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:27,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 11:57:27,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:27,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 11:57:27,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1126, Unknown=16, NotChecked=0, Total=1260 [2022-12-13 11:57:27,799 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 11:57:27,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 342 transitions, 6062 flow. Second operand has 36 states, 36 states have (on average 89.41666666666667) internal successors, (3219), 36 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:27,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:27,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 11:57:27,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:34,193 INFO L130 PetriNetUnfolder]: 16762/28093 cut-off events. [2022-12-13 11:57:34,193 INFO L131 PetriNetUnfolder]: For 424384/424756 co-relation queries the response was YES. [2022-12-13 11:57:34,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213464 conditions, 28093 events. 16762/28093 cut-off events. For 424384/424756 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 211446 event pairs, 2977 based on Foata normal form. 1208/28645 useless extension candidates. Maximal degree in co-relation 213408. Up to 9096 conditions per place. [2022-12-13 11:57:34,414 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 1428 selfloop transitions, 60 changer transitions 0/1494 dead transitions. [2022-12-13 11:57:34,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 1494 transitions, 32646 flow [2022-12-13 11:57:34,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 11:57:34,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 11:57:34,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1628 transitions. [2022-12-13 11:57:34,416 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3627450980392157 [2022-12-13 11:57:34,416 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1628 transitions. [2022-12-13 11:57:34,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1628 transitions. [2022-12-13 11:57:34,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:34,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1628 transitions. [2022-12-13 11:57:34,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 95.76470588235294) internal successors, (1628), 17 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:34,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 264.0) internal successors, (4752), 18 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:34,419 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 264.0) internal successors, (4752), 18 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:34,419 INFO L175 Difference]: Start difference. First operand has 253 places, 342 transitions, 6062 flow. Second operand 17 states and 1628 transitions. [2022-12-13 11:57:34,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 1494 transitions, 32646 flow [2022-12-13 11:57:35,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 1494 transitions, 31566 flow, removed 311 selfloop flow, removed 4 redundant places. [2022-12-13 11:57:35,598 INFO L231 Difference]: Finished difference. Result has 266 places, 340 transitions, 6003 flow [2022-12-13 11:57:35,598 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=5847, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6003, PETRI_PLACES=266, PETRI_TRANSITIONS=340} [2022-12-13 11:57:35,598 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 227 predicate places. [2022-12-13 11:57:35,598 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 340 transitions, 6003 flow [2022-12-13 11:57:35,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 89.41666666666667) internal successors, (3219), 36 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:35,599 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:35,599 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:35,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 11:57:35,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:35,800 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:57:35,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:35,800 INFO L85 PathProgramCache]: Analyzing trace with hash 209754760, now seen corresponding path program 1 times [2022-12-13 11:57:35,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:35,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147680692] [2022-12-13 11:57:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:35,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 11:57:35,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:35,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147680692] [2022-12-13 11:57:35,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147680692] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:35,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:57:35,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:57:35,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964685112] [2022-12-13 11:57:35,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:35,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:57:35,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:35,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:57:35,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:57:35,835 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 264 [2022-12-13 11:57:35,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 340 transitions, 6003 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:35,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:35,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 264 [2022-12-13 11:57:35,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:40,188 INFO L130 PetriNetUnfolder]: 14771/25285 cut-off events. [2022-12-13 11:57:40,188 INFO L131 PetriNetUnfolder]: For 361497/363084 co-relation queries the response was YES. [2022-12-13 11:57:40,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195025 conditions, 25285 events. 14771/25285 cut-off events. For 361497/363084 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 191464 event pairs, 8041 based on Foata normal form. 2881/28122 useless extension candidates. Maximal degree in co-relation 194967. Up to 25061 conditions per place. [2022-12-13 11:57:40,381 INFO L137 encePairwiseOnDemand]: 262/264 looper letters, 371 selfloop transitions, 6 changer transitions 0/380 dead transitions. [2022-12-13 11:57:40,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 380 transitions, 7274 flow [2022-12-13 11:57:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:57:40,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:57:40,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2022-12-13 11:57:40,382 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47853535353535354 [2022-12-13 11:57:40,382 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2022-12-13 11:57:40,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2022-12-13 11:57:40,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:40,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2022-12-13 11:57:40,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:40,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:40,383 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:40,383 INFO L175 Difference]: Start difference. First operand has 266 places, 340 transitions, 6003 flow. Second operand 3 states and 379 transitions. [2022-12-13 11:57:40,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 380 transitions, 7274 flow [2022-12-13 11:57:41,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 380 transitions, 6996 flow, removed 1 selfloop flow, removed 18 redundant places. [2022-12-13 11:57:41,051 INFO L231 Difference]: Finished difference. Result has 248 places, 328 transitions, 5626 flow [2022-12-13 11:57:41,051 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=5614, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5626, PETRI_PLACES=248, PETRI_TRANSITIONS=328} [2022-12-13 11:57:41,052 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 209 predicate places. [2022-12-13 11:57:41,052 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 328 transitions, 5626 flow [2022-12-13 11:57:41,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:41,052 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:41,052 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1] [2022-12-13 11:57:41,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-12-13 11:57:41,052 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:57:41,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:41,052 INFO L85 PathProgramCache]: Analyzing trace with hash -590367191, now seen corresponding path program 3 times [2022-12-13 11:57:41,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:41,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847447829] [2022-12-13 11:57:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:41,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:41,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:41,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847447829] [2022-12-13 11:57:41,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847447829] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:41,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240359297] [2022-12-13 11:57:41,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:57:41,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:41,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:41,544 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:41,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 11:57:41,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 11:57:41,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:57:41,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 11:57:41,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:41,906 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 11:57:41,943 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 11:57:41,943 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 11:57:41,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:57:41,975 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 16 treesize of output 18 [2022-12-13 11:57:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:42,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:42,250 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1384 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1384) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2022-12-13 11:57:42,326 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 11:57:42,326 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 31 treesize of output 37 [2022-12-13 11:57:42,332 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:57:42,333 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 37 treesize of output 33 [2022-12-13 11:57:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-13 11:57:42,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240359297] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:42,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:42,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2022-12-13 11:57:42,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147657102] [2022-12-13 11:57:42,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:42,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 11:57:42,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:42,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 11:57:42,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1433, Unknown=11, NotChecked=76, Total=1640 [2022-12-13 11:57:42,598 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 264 [2022-12-13 11:57:42,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 328 transitions, 5626 flow. Second operand has 41 states, 41 states have (on average 92.39024390243902) internal successors, (3788), 41 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:42,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:42,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 264 [2022-12-13 11:57:42,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:48,198 INFO L130 PetriNetUnfolder]: 14751/25228 cut-off events. [2022-12-13 11:57:48,198 INFO L131 PetriNetUnfolder]: For 286488/288031 co-relation queries the response was YES. [2022-12-13 11:57:48,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188069 conditions, 25228 events. 14751/25228 cut-off events. For 286488/288031 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 192144 event pairs, 6484 based on Foata normal form. 1544/26104 useless extension candidates. Maximal degree in co-relation 188014. Up to 11850 conditions per place. [2022-12-13 11:57:48,389 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 272 selfloop transitions, 170 changer transitions 0/445 dead transitions. [2022-12-13 11:57:48,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 445 transitions, 8021 flow [2022-12-13 11:57:48,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 11:57:48,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 11:57:48,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2101 transitions. [2022-12-13 11:57:48,392 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36174242424242425 [2022-12-13 11:57:48,392 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2101 transitions. [2022-12-13 11:57:48,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2101 transitions. [2022-12-13 11:57:48,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:48,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2101 transitions. [2022-12-13 11:57:48,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 95.5) internal successors, (2101), 22 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:48,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 264.0) internal successors, (6072), 23 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:48,397 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 264.0) internal successors, (6072), 23 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:48,397 INFO L175 Difference]: Start difference. First operand has 248 places, 328 transitions, 5626 flow. Second operand 22 states and 2101 transitions. [2022-12-13 11:57:48,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 445 transitions, 8021 flow [2022-12-13 11:57:49,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 445 transitions, 8015 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:57:49,024 INFO L231 Difference]: Finished difference. Result has 274 places, 344 transitions, 6163 flow [2022-12-13 11:57:49,024 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=5620, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6163, PETRI_PLACES=274, PETRI_TRANSITIONS=344} [2022-12-13 11:57:49,025 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 235 predicate places. [2022-12-13 11:57:49,025 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 344 transitions, 6163 flow [2022-12-13 11:57:49,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 92.39024390243902) internal successors, (3788), 41 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:49,025 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:49,025 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1] [2022-12-13 11:57:49,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 11:57:49,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:49,226 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:57:49,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:49,227 INFO L85 PathProgramCache]: Analyzing trace with hash -590367192, now seen corresponding path program 7 times [2022-12-13 11:57:49,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:49,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596364477] [2022-12-13 11:57:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:49,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:49,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:49,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596364477] [2022-12-13 11:57:49,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596364477] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:49,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848359907] [2022-12-13 11:57:49,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:57:49,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:49,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:49,709 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:49,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 11:57:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:49,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 11:57:49,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:49,945 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 11:57:49,985 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 25 treesize of output 24 [2022-12-13 11:57:50,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:57:50,021 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 11:57:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:50,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:50,311 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1435 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1435) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2022-12-13 11:57:50,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:57:50,399 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 34 treesize of output 40 [2022-12-13 11:57:50,404 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:57:50,405 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 43 treesize of output 39 [2022-12-13 11:57:50,417 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 9 treesize of output 5 [2022-12-13 11:57:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-13 11:57:50,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848359907] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:50,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:50,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2022-12-13 11:57:50,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317813724] [2022-12-13 11:57:50,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:50,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 11:57:50,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:50,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 11:57:50,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1276, Unknown=13, NotChecked=72, Total=1482 [2022-12-13 11:57:50,555 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 264 [2022-12-13 11:57:50,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 344 transitions, 6163 flow. Second operand has 39 states, 39 states have (on average 92.38461538461539) internal successors, (3603), 39 states have internal predecessors, (3603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:50,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:50,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 264 [2022-12-13 11:57:50,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:56,912 INFO L130 PetriNetUnfolder]: 14769/25242 cut-off events. [2022-12-13 11:57:56,912 INFO L131 PetriNetUnfolder]: For 298137/299708 co-relation queries the response was YES. [2022-12-13 11:57:57,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193336 conditions, 25242 events. 14769/25242 cut-off events. For 298137/299708 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 191475 event pairs, 6537 based on Foata normal form. 1573/26153 useless extension candidates. Maximal degree in co-relation 193274. Up to 11828 conditions per place. [2022-12-13 11:57:57,102 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 282 selfloop transitions, 215 changer transitions 0/500 dead transitions. [2022-12-13 11:57:57,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 500 transitions, 9299 flow [2022-12-13 11:57:57,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 11:57:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-12-13 11:57:57,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4447 transitions. [2022-12-13 11:57:57,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.358397807865893 [2022-12-13 11:57:57,106 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4447 transitions. [2022-12-13 11:57:57,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4447 transitions. [2022-12-13 11:57:57,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:57,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4447 transitions. [2022-12-13 11:57:57,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 94.61702127659575) internal successors, (4447), 47 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:57,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 264.0) internal successors, (12672), 48 states have internal predecessors, (12672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:57,115 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 264.0) internal successors, (12672), 48 states have internal predecessors, (12672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:57,115 INFO L175 Difference]: Start difference. First operand has 274 places, 344 transitions, 6163 flow. Second operand 47 states and 4447 transitions. [2022-12-13 11:57:57,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 500 transitions, 9299 flow [2022-12-13 11:57:57,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 500 transitions, 9146 flow, removed 13 selfloop flow, removed 7 redundant places. [2022-12-13 11:57:57,804 INFO L231 Difference]: Finished difference. Result has 314 places, 387 transitions, 7071 flow [2022-12-13 11:57:57,804 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=6024, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=7071, PETRI_PLACES=314, PETRI_TRANSITIONS=387} [2022-12-13 11:57:57,804 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 275 predicate places. [2022-12-13 11:57:57,804 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 387 transitions, 7071 flow [2022-12-13 11:57:57,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 92.38461538461539) internal successors, (3603), 39 states have internal predecessors, (3603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:57,805 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:57,805 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:57,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-13 11:57:58,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-13 11:57:58,006 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:57:58,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:58,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1125697446, now seen corresponding path program 2 times [2022-12-13 11:57:58,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:58,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664920873] [2022-12-13 11:57:58,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:58,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:57:58,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:58,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664920873] [2022-12-13 11:57:58,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664920873] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:58,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528693871] [2022-12-13 11:57:58,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:57:58,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:58,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:58,072 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:58,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 11:57:58,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 11:57:58,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:57:58,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 11:57:58,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-13 11:57:58,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-13 11:57:58,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528693871] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:58,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:58,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 2, 2] total 8 [2022-12-13 11:57:58,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413027823] [2022-12-13 11:57:58,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:58,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 11:57:58,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:58,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 11:57:58,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-13 11:57:58,305 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 264 [2022-12-13 11:57:58,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 387 transitions, 7071 flow. Second operand has 9 states, 9 states have (on average 114.11111111111111) internal successors, (1027), 9 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:58,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:58,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 264 [2022-12-13 11:57:58,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:58:04,458 INFO L130 PetriNetUnfolder]: 20430/34162 cut-off events. [2022-12-13 11:58:04,458 INFO L131 PetriNetUnfolder]: For 524305/524831 co-relation queries the response was YES. [2022-12-13 11:58:04,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266936 conditions, 34162 events. 20430/34162 cut-off events. For 524305/524831 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 259336 event pairs, 4388 based on Foata normal form. 1754/35298 useless extension candidates. Maximal degree in co-relation 266873. Up to 8910 conditions per place. [2022-12-13 11:58:04,777 INFO L137 encePairwiseOnDemand]: 256/264 looper letters, 1078 selfloop transitions, 53 changer transitions 56/1194 dead transitions. [2022-12-13 11:58:04,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 1194 transitions, 27096 flow [2022-12-13 11:58:04,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:58:04,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:58:04,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1099 transitions. [2022-12-13 11:58:04,778 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46254208754208753 [2022-12-13 11:58:04,778 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1099 transitions. [2022-12-13 11:58:04,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1099 transitions. [2022-12-13 11:58:04,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:58:04,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1099 transitions. [2022-12-13 11:58:04,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 122.11111111111111) internal successors, (1099), 9 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:04,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 264.0) internal successors, (2640), 10 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:04,781 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 264.0) internal successors, (2640), 10 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:04,781 INFO L175 Difference]: Start difference. First operand has 314 places, 387 transitions, 7071 flow. Second operand 9 states and 1099 transitions. [2022-12-13 11:58:04,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 1194 transitions, 27096 flow [2022-12-13 11:58:05,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 1194 transitions, 26419 flow, removed 27 selfloop flow, removed 24 redundant places. [2022-12-13 11:58:05,882 INFO L231 Difference]: Finished difference. Result has 298 places, 391 transitions, 7001 flow [2022-12-13 11:58:05,882 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=6711, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7001, PETRI_PLACES=298, PETRI_TRANSITIONS=391} [2022-12-13 11:58:05,882 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 259 predicate places. [2022-12-13 11:58:05,882 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 391 transitions, 7001 flow [2022-12-13 11:58:05,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 114.11111111111111) internal successors, (1027), 9 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:05,882 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:58:05,882 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 11:58:05,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-13 11:58:06,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:58:06,083 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:58:06,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:58:06,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1619855904, now seen corresponding path program 4 times [2022-12-13 11:58:06,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:58:06,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784782265] [2022-12-13 11:58:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:58:06,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:58:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:58:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:06,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:58:06,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784782265] [2022-12-13 11:58:06,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784782265] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:58:06,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167658186] [2022-12-13 11:58:06,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:58:06,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:58:06,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:58:06,511 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:58:06,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 11:58:06,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:58:06,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:58:06,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 11:58:06,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:58:06,770 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 11:58:06,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:58:06,803 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 27 treesize of output 26 [2022-12-13 11:58:06,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:58:06,842 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 11:58:06,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:58:06,875 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 11:58:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:07,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:58:07,182 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1533 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1533) c_~A~0.base) (+ c_~A~0.offset 16)) 9223372039002259456))) is different from false [2022-12-13 11:58:07,329 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 11:58:07,329 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 36 treesize of output 42 [2022-12-13 11:58:07,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:58:07,337 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 81 treesize of output 77 [2022-12-13 11:58:07,340 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 62 treesize of output 54 [2022-12-13 11:58:07,344 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 28 treesize of output 24 [2022-12-13 11:58:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:07,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167658186] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:58:07,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:58:07,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2022-12-13 11:58:07,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450316592] [2022-12-13 11:58:07,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:58:07,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 11:58:07,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:58:07,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 11:58:07,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1497, Unknown=11, NotChecked=78, Total=1722 [2022-12-13 11:58:07,640 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 11:58:07,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 391 transitions, 7001 flow. Second operand has 42 states, 42 states have (on average 89.38095238095238) internal successors, (3754), 42 states have internal predecessors, (3754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:07,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:58:07,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 11:58:07,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:58:14,897 INFO L130 PetriNetUnfolder]: 17745/29929 cut-off events. [2022-12-13 11:58:14,897 INFO L131 PetriNetUnfolder]: For 419793/421841 co-relation queries the response was YES. [2022-12-13 11:58:15,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242022 conditions, 29929 events. 17745/29929 cut-off events. For 419793/421841 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 227630 event pairs, 5676 based on Foata normal form. 2143/31496 useless extension candidates. Maximal degree in co-relation 241963. Up to 8408 conditions per place. [2022-12-13 11:58:15,205 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 780 selfloop transitions, 214 changer transitions 0/997 dead transitions. [2022-12-13 11:58:15,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 997 transitions, 18083 flow [2022-12-13 11:58:15,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 11:58:15,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 11:58:15,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2021 transitions. [2022-12-13 11:58:15,207 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36453823953823955 [2022-12-13 11:58:15,208 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2021 transitions. [2022-12-13 11:58:15,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2021 transitions. [2022-12-13 11:58:15,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:58:15,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2021 transitions. [2022-12-13 11:58:15,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 96.23809523809524) internal successors, (2021), 21 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:15,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 264.0) internal successors, (5808), 22 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:15,211 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 264.0) internal successors, (5808), 22 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:15,211 INFO L175 Difference]: Start difference. First operand has 298 places, 391 transitions, 7001 flow. Second operand 21 states and 2021 transitions. [2022-12-13 11:58:15,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 997 transitions, 18083 flow [2022-12-13 11:58:16,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 997 transitions, 17687 flow, removed 24 selfloop flow, removed 6 redundant places. [2022-12-13 11:58:16,081 INFO L231 Difference]: Finished difference. Result has 310 places, 395 transitions, 7530 flow [2022-12-13 11:58:16,081 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=6931, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7530, PETRI_PLACES=310, PETRI_TRANSITIONS=395} [2022-12-13 11:58:16,082 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 271 predicate places. [2022-12-13 11:58:16,082 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 395 transitions, 7530 flow [2022-12-13 11:58:16,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 89.38095238095238) internal successors, (3754), 42 states have internal predecessors, (3754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:16,082 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:58:16,082 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 11:58:16,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-13 11:58:16,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:58:16,283 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:58:16,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:58:16,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1619855903, now seen corresponding path program 4 times [2022-12-13 11:58:16,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:58:16,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224842035] [2022-12-13 11:58:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:58:16,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:58:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:58:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:16,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:58:16,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224842035] [2022-12-13 11:58:16,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224842035] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:58:16,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459883301] [2022-12-13 11:58:16,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:58:16,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:58:16,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:58:16,708 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:58:16,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 11:58:16,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:58:16,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:58:16,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 11:58:16,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:58:17,007 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 11:58:17,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:58:17,038 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 25 treesize of output 24 [2022-12-13 11:58:17,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:58:17,070 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 16 treesize of output 18 [2022-12-13 11:58:17,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:58:17,098 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 16 treesize of output 18 [2022-12-13 11:58:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:17,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:58:17,348 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1589 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1589) c_~A~0.base) (+ c_~A~0.offset 16)) 4294967296)) is different from false [2022-12-13 11:58:17,355 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1589 (Array Int Int)) (v_ArrVal_1588 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1588) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1589) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2022-12-13 11:58:17,433 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 11:58:17,433 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 34 treesize of output 40 [2022-12-13 11:58:17,439 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:58:17,439 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 141 treesize of output 131 [2022-12-13 11:58:17,442 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 118 treesize of output 110 [2022-12-13 11:58:17,445 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 110 treesize of output 94 [2022-12-13 11:58:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-13 11:58:17,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459883301] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:58:17,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:58:17,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2022-12-13 11:58:17,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871596460] [2022-12-13 11:58:17,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:58:17,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 11:58:17,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:58:17,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 11:58:17,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1431, Unknown=5, NotChecked=154, Total=1722 [2022-12-13 11:58:17,713 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 11:58:17,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 395 transitions, 7530 flow. Second operand has 42 states, 42 states have (on average 89.38095238095238) internal successors, (3754), 42 states have internal predecessors, (3754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:17,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:58:17,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 11:58:17,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:58:25,096 INFO L130 PetriNetUnfolder]: 17591/29680 cut-off events. [2022-12-13 11:58:25,096 INFO L131 PetriNetUnfolder]: For 440599/442621 co-relation queries the response was YES. [2022-12-13 11:58:25,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246411 conditions, 29680 events. 17591/29680 cut-off events. For 440599/442621 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 226010 event pairs, 5654 based on Foata normal form. 2117/31225 useless extension candidates. Maximal degree in co-relation 246349. Up to 8378 conditions per place. [2022-12-13 11:58:25,356 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 780 selfloop transitions, 213 changer transitions 0/996 dead transitions. [2022-12-13 11:58:25,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 996 transitions, 18198 flow [2022-12-13 11:58:25,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 11:58:25,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 11:58:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2020 transitions. [2022-12-13 11:58:25,359 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3643578643578644 [2022-12-13 11:58:25,359 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2020 transitions. [2022-12-13 11:58:25,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2020 transitions. [2022-12-13 11:58:25,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:58:25,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2020 transitions. [2022-12-13 11:58:25,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 96.19047619047619) internal successors, (2020), 21 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:25,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 264.0) internal successors, (5808), 22 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:25,362 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 264.0) internal successors, (5808), 22 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:25,362 INFO L175 Difference]: Start difference. First operand has 310 places, 395 transitions, 7530 flow. Second operand 21 states and 2020 transitions. [2022-12-13 11:58:25,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 996 transitions, 18198 flow [2022-12-13 11:58:26,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 996 transitions, 17715 flow, removed 0 selfloop flow, removed 16 redundant places. [2022-12-13 11:58:26,362 INFO L231 Difference]: Finished difference. Result has 314 places, 394 transitions, 7457 flow [2022-12-13 11:58:26,362 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=7031, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7457, PETRI_PLACES=314, PETRI_TRANSITIONS=394} [2022-12-13 11:58:26,362 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 275 predicate places. [2022-12-13 11:58:26,362 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 394 transitions, 7457 flow [2022-12-13 11:58:26,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 89.38095238095238) internal successors, (3754), 42 states have internal predecessors, (3754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:26,363 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:58:26,363 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:58:26,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-13 11:58:26,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 11:58:26,564 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:58:26,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:58:26,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1240089237, now seen corresponding path program 5 times [2022-12-13 11:58:26,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:58:26,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662941312] [2022-12-13 11:58:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:58:26,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:58:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:58:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:26,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:58:26,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662941312] [2022-12-13 11:58:26,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662941312] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:58:26,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055633122] [2022-12-13 11:58:26,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:58:26,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:58:26,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:58:26,981 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:58:26,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 11:58:27,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 11:58:27,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:58:27,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 11:58:27,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:58:27,249 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 11:58:27,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:58:27,281 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 11:58:27,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:58:27,311 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 11:58:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:27,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:58:29,720 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:58:29,721 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 11:58:29,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:58:29,727 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 81 treesize of output 77 [2022-12-13 11:58:29,729 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 62 treesize of output 54 [2022-12-13 11:58:29,733 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 28 treesize of output 24 [2022-12-13 11:58:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:29,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055633122] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:58:29,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:58:29,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2022-12-13 11:58:29,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705274640] [2022-12-13 11:58:29,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:58:29,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 11:58:29,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:58:29,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 11:58:29,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1500, Unknown=14, NotChecked=0, Total=1640 [2022-12-13 11:58:31,588 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 11:58:31,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 394 transitions, 7457 flow. Second operand has 41 states, 41 states have (on average 89.46341463414635) internal successors, (3668), 41 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:31,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:58:31,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 11:58:31,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:58:38,913 INFO L130 PetriNetUnfolder]: 16938/28786 cut-off events. [2022-12-13 11:58:38,913 INFO L131 PetriNetUnfolder]: For 509476/509993 co-relation queries the response was YES. [2022-12-13 11:58:39,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239882 conditions, 28786 events. 16938/28786 cut-off events. For 509476/509993 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 219421 event pairs, 4835 based on Foata normal form. 1261/29505 useless extension candidates. Maximal degree in co-relation 239820. Up to 7986 conditions per place. [2022-12-13 11:58:39,233 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 1184 selfloop transitions, 72 changer transitions 0/1263 dead transitions. [2022-12-13 11:58:39,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1263 transitions, 30397 flow [2022-12-13 11:58:39,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 11:58:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 11:58:39,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2008 transitions. [2022-12-13 11:58:39,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3621933621933622 [2022-12-13 11:58:39,236 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2008 transitions. [2022-12-13 11:58:39,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2008 transitions. [2022-12-13 11:58:39,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:58:39,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2008 transitions. [2022-12-13 11:58:39,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 95.61904761904762) internal successors, (2008), 21 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:39,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 264.0) internal successors, (5808), 22 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:39,240 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 264.0) internal successors, (5808), 22 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:39,240 INFO L175 Difference]: Start difference. First operand has 314 places, 394 transitions, 7457 flow. Second operand 21 states and 2008 transitions. [2022-12-13 11:58:39,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1263 transitions, 30397 flow [2022-12-13 11:58:40,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1263 transitions, 28895 flow, removed 12 selfloop flow, removed 19 redundant places. [2022-12-13 11:58:40,646 INFO L231 Difference]: Finished difference. Result has 317 places, 395 transitions, 7290 flow [2022-12-13 11:58:40,647 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=7055, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7290, PETRI_PLACES=317, PETRI_TRANSITIONS=395} [2022-12-13 11:58:40,647 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 278 predicate places. [2022-12-13 11:58:40,647 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 395 transitions, 7290 flow [2022-12-13 11:58:40,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 89.46341463414635) internal successors, (3668), 41 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:40,647 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:58:40,647 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:58:40,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-13 11:58:40,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 11:58:40,849 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:58:40,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:58:40,850 INFO L85 PathProgramCache]: Analyzing trace with hash -2141119114, now seen corresponding path program 5 times [2022-12-13 11:58:40,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:58:40,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851956864] [2022-12-13 11:58:40,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:58:40,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:58:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:58:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:41,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:58:41,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851956864] [2022-12-13 11:58:41,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851956864] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:58:41,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828577198] [2022-12-13 11:58:41,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:58:41,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:58:41,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:58:41,416 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:58:41,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 11:58:41,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 11:58:41,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:58:41,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 11:58:41,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:58:41,726 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 11:58:41,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:58:41,755 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 25 treesize of output 24 [2022-12-13 11:58:41,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:58:41,790 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 16 treesize of output 18 [2022-12-13 11:58:41,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:58:41,818 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 16 treesize of output 18 [2022-12-13 11:58:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:41,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:58:42,076 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1695 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1695) c_~A~0.base) (+ c_~A~0.offset 16)) 9223372039002259456)) is different from false [2022-12-13 11:58:42,219 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 11:58:42,220 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 34 treesize of output 40 [2022-12-13 11:58:42,226 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:58:42,226 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 71 treesize of output 67 [2022-12-13 11:58:42,229 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 54 treesize of output 46 [2022-12-13 11:58:42,234 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 24 treesize of output 20 [2022-12-13 11:58:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:42,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828577198] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:58:42,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:58:42,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2022-12-13 11:58:42,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365093776] [2022-12-13 11:58:42,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:58:42,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 11:58:42,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:58:42,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 11:58:42,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1495, Unknown=12, NotChecked=78, Total=1722 [2022-12-13 11:58:42,475 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 11:58:42,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 395 transitions, 7290 flow. Second operand has 42 states, 42 states have (on average 89.42857142857143) internal successors, (3756), 42 states have internal predecessors, (3756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:42,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:58:42,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 11:58:42,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:58:49,773 INFO L130 PetriNetUnfolder]: 16658/28296 cut-off events. [2022-12-13 11:58:49,773 INFO L131 PetriNetUnfolder]: For 475608/476111 co-relation queries the response was YES. [2022-12-13 11:58:49,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238864 conditions, 28296 events. 16658/28296 cut-off events. For 475608/476111 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 214277 event pairs, 4585 based on Foata normal form. 713/29005 useless extension candidates. Maximal degree in co-relation 238801. Up to 7928 conditions per place. [2022-12-13 11:58:50,026 INFO L137 encePairwiseOnDemand]: 256/264 looper letters, 1216 selfloop transitions, 74 changer transitions 0/1297 dead transitions. [2022-12-13 11:58:50,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 1297 transitions, 29939 flow [2022-12-13 11:58:50,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 11:58:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 11:58:50,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2006 transitions. [2022-12-13 11:58:50,028 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36183261183261184 [2022-12-13 11:58:50,028 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2006 transitions. [2022-12-13 11:58:50,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2006 transitions. [2022-12-13 11:58:50,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:58:50,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2006 transitions. [2022-12-13 11:58:50,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 95.52380952380952) internal successors, (2006), 21 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:50,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 264.0) internal successors, (5808), 22 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:50,032 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 264.0) internal successors, (5808), 22 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:50,032 INFO L175 Difference]: Start difference. First operand has 317 places, 395 transitions, 7290 flow. Second operand 21 states and 2006 transitions. [2022-12-13 11:58:50,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 1297 transitions, 29939 flow [2022-12-13 11:58:50,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 1297 transitions, 29841 flow, removed 1 selfloop flow, removed 13 redundant places. [2022-12-13 11:58:50,836 INFO L231 Difference]: Finished difference. Result has 324 places, 394 transitions, 7317 flow [2022-12-13 11:58:50,836 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=7169, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7317, PETRI_PLACES=324, PETRI_TRANSITIONS=394} [2022-12-13 11:58:50,837 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 285 predicate places. [2022-12-13 11:58:50,837 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 394 transitions, 7317 flow [2022-12-13 11:58:50,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 89.42857142857143) internal successors, (3756), 42 states have internal predecessors, (3756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:50,837 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:58:50,837 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1] [2022-12-13 11:58:50,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-13 11:58:51,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:58:51,038 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:58:51,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:58:51,039 INFO L85 PathProgramCache]: Analyzing trace with hash -407167594, now seen corresponding path program 8 times [2022-12-13 11:58:51,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:58:51,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336804613] [2022-12-13 11:58:51,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:58:51,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:58:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:58:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:51,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:58:51,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336804613] [2022-12-13 11:58:51,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336804613] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:58:51,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342295734] [2022-12-13 11:58:51,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:58:51,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:58:51,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:58:51,460 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:58:51,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-13 11:58:51,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:58:51,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:58:51,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 11:58:51,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:58:51,761 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 11:58:51,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:58:51,817 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 11:58:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:52,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:58:52,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:58:52,503 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 28 treesize of output 29 [2022-12-13 11:58:52,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:58:52,510 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 47 treesize of output 43 [2022-12-13 11:58:52,513 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 15 treesize of output 9 [2022-12-13 11:58:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:52,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342295734] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:58:52,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:58:52,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2022-12-13 11:58:52,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528273009] [2022-12-13 11:58:52,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:58:52,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 11:58:52,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:58:52,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 11:58:52,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 11:58:55,030 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] [2022-12-13 11:58:58,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:58:58,991 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 264 [2022-12-13 11:58:58,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 394 transitions, 7317 flow. Second operand has 44 states, 44 states have (on average 96.43181818181819) internal successors, (4243), 44 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:58,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:58:58,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 264 [2022-12-13 11:58:58,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:59:00,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:59:02,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:59:06,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:59:16,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:59:29,174 INFO L130 PetriNetUnfolder]: 28461/47948 cut-off events. [2022-12-13 11:59:29,174 INFO L131 PetriNetUnfolder]: For 789318/793386 co-relation queries the response was YES. [2022-12-13 11:59:29,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410412 conditions, 47948 events. 28461/47948 cut-off events. For 789318/793386 co-relation queries the response was YES. Maximal size of possible extension queue 1129. Compared 391073 event pairs, 8103 based on Foata normal form. 4338/52284 useless extension candidates. Maximal degree in co-relation 410350. Up to 12740 conditions per place. [2022-12-13 11:59:29,619 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 1160 selfloop transitions, 408 changer transitions 5/1576 dead transitions. [2022-12-13 11:59:29,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 1576 transitions, 29533 flow [2022-12-13 11:59:29,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-12-13 11:59:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2022-12-13 11:59:29,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 12743 transitions. [2022-12-13 11:59:29,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3771010890151515 [2022-12-13 11:59:29,628 INFO L72 ComplementDD]: Start complementDD. Operand 128 states and 12743 transitions. [2022-12-13 11:59:29,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 12743 transitions. [2022-12-13 11:59:29,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:59:29,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 128 states and 12743 transitions. [2022-12-13 11:59:29,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 129 states, 128 states have (on average 99.5546875) internal successors, (12743), 128 states have internal predecessors, (12743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:29,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 129 states, 129 states have (on average 264.0) internal successors, (34056), 129 states have internal predecessors, (34056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:29,656 INFO L81 ComplementDD]: Finished complementDD. Result has 129 states, 129 states have (on average 264.0) internal successors, (34056), 129 states have internal predecessors, (34056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:29,656 INFO L175 Difference]: Start difference. First operand has 324 places, 394 transitions, 7317 flow. Second operand 128 states and 12743 transitions. [2022-12-13 11:59:29,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 1576 transitions, 29533 flow [2022-12-13 11:59:31,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1576 transitions, 28379 flow, removed 25 selfloop flow, removed 18 redundant places. [2022-12-13 11:59:31,444 INFO L231 Difference]: Finished difference. Result has 451 places, 585 transitions, 11896 flow [2022-12-13 11:59:31,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=7179, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=128, PETRI_FLOW=11896, PETRI_PLACES=451, PETRI_TRANSITIONS=585} [2022-12-13 11:59:31,444 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 412 predicate places. [2022-12-13 11:59:31,444 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 585 transitions, 11896 flow [2022-12-13 11:59:31,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 96.43181818181819) internal successors, (4243), 44 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:31,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:59:31,445 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1] [2022-12-13 11:59:31,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-13 11:59:31,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-13 11:59:31,646 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:59:31,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:59:31,647 INFO L85 PathProgramCache]: Analyzing trace with hash -407167593, now seen corresponding path program 4 times [2022-12-13 11:59:31,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:59:31,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781742648] [2022-12-13 11:59:31,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:59:31,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:59:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:59:32,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:59:32,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781742648] [2022-12-13 11:59:32,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781742648] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:59:32,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253856154] [2022-12-13 11:59:32,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:59:32,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:59:32,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:59:32,015 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:59:32,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-13 11:59:32,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:59:32,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:59:32,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 11:59:32,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:59:32,290 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 11:59:32,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:59:32,323 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 16 treesize of output 18 [2022-12-13 11:59:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:59:32,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:59:32,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:59:32,767 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 24 treesize of output 25 [2022-12-13 11:59:32,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:59:32,771 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 37 treesize of output 33 [2022-12-13 11:59:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:59:32,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253856154] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:59:32,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:59:32,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2022-12-13 11:59:32,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908689293] [2022-12-13 11:59:32,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:59:32,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 11:59:32,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:59:32,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 11:59:32,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1752, Unknown=10, NotChecked=0, Total=1892 [2022-12-13 11:59:36,340 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 264 [2022-12-13 11:59:36,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 585 transitions, 11896 flow. Second operand has 44 states, 44 states have (on average 104.43181818181819) internal successors, (4595), 44 states have internal predecessors, (4595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:36,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:59:36,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 264 [2022-12-13 11:59:36,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:59:48,573 INFO L130 PetriNetUnfolder]: 28404/47786 cut-off events. [2022-12-13 11:59:48,573 INFO L131 PetriNetUnfolder]: For 787504/791620 co-relation queries the response was YES. [2022-12-13 11:59:48,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419602 conditions, 47786 events. 28404/47786 cut-off events. For 787504/791620 co-relation queries the response was YES. Maximal size of possible extension queue 1126. Compared 385451 event pairs, 10867 based on Foata normal form. 4119/51233 useless extension candidates. Maximal degree in co-relation 419523. Up to 16237 conditions per place. [2022-12-13 11:59:49,096 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 361 selfloop transitions, 333 changer transitions 0/697 dead transitions. [2022-12-13 11:59:49,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 697 transitions, 14946 flow [2022-12-13 11:59:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 11:59:49,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 11:59:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2802 transitions. [2022-12-13 11:59:49,099 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40821678321678323 [2022-12-13 11:59:49,099 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2802 transitions. [2022-12-13 11:59:49,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2802 transitions. [2022-12-13 11:59:49,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:59:49,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2802 transitions. [2022-12-13 11:59:49,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 107.76923076923077) internal successors, (2802), 26 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:49,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 264.0) internal successors, (7128), 27 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 11:59:49,105 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 264.0) internal successors, (7128), 27 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 11:59:49,105 INFO L175 Difference]: Start difference. First operand has 451 places, 585 transitions, 11896 flow. Second operand 26 states and 2802 transitions. [2022-12-13 11:59:49,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 697 transitions, 14946 flow [2022-12-13 11:59:52,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 697 transitions, 14045 flow, removed 124 selfloop flow, removed 53 redundant places. [2022-12-13 11:59:52,212 INFO L231 Difference]: Finished difference. Result has 424 places, 585 transitions, 11705 flow [2022-12-13 11:59:52,212 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=10970, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=11705, PETRI_PLACES=424, PETRI_TRANSITIONS=585} [2022-12-13 11:59:52,212 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 385 predicate places. [2022-12-13 11:59:52,212 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 585 transitions, 11705 flow [2022-12-13 11:59:52,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 104.43181818181819) internal successors, (4595), 44 states have internal predecessors, (4595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:52,213 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:59:52,213 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 11:59:52,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-13 11:59:52,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:59:52,414 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 11:59:52,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:59:52,415 INFO L85 PathProgramCache]: Analyzing trace with hash -688126138, now seen corresponding path program 5 times [2022-12-13 11:59:52,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:59:52,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809435495] [2022-12-13 11:59:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:59:52,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:59:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:59:52,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:59:52,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809435495] [2022-12-13 11:59:52,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809435495] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:59:52,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901445257] [2022-12-13 11:59:52,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:59:52,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:59:52,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:59:52,837 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:59:52,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-13 11:59:53,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-13 11:59:53,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:59:53,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 11:59:53,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:59:53,141 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 11:59:53,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:59:53,172 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 11:59:53,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:59:53,229 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 11:59:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:59:53,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:59:55,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:59:55,109 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 11:59:55,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:59:55,114 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 81 treesize of output 77 [2022-12-13 11:59:55,116 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 62 treesize of output 54 [2022-12-13 11:59:55,119 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 28 treesize of output 24 [2022-12-13 11:59:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:59:55,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901445257] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:59:55,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:59:55,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2022-12-13 11:59:55,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608037085] [2022-12-13 11:59:55,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:59:55,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 11:59:55,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:59:55,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 11:59:55,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2005, Unknown=25, NotChecked=0, Total=2162 [2022-12-13 11:59:57,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 264 [2022-12-13 11:59:57,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 585 transitions, 11705 flow. Second operand has 47 states, 47 states have (on average 94.40425531914893) internal successors, (4437), 47 states have internal predecessors, (4437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:57,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:59:57,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 264 [2022-12-13 11:59:57,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:00:11,038 INFO L130 PetriNetUnfolder]: 28128/47339 cut-off events. [2022-12-13 12:00:11,038 INFO L131 PetriNetUnfolder]: For 795670/799717 co-relation queries the response was YES. [2022-12-13 12:00:11,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419085 conditions, 47339 events. 28128/47339 cut-off events. For 795670/799717 co-relation queries the response was YES. Maximal size of possible extension queue 1117. Compared 381964 event pairs, 9431 based on Foata normal form. 4221/50898 useless extension candidates. Maximal degree in co-relation 419011. Up to 12657 conditions per place. [2022-12-13 12:00:11,548 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 758 selfloop transitions, 309 changer transitions 0/1070 dead transitions. [2022-12-13 12:00:11,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 1070 transitions, 21178 flow [2022-12-13 12:00:11,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 12:00:11,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 12:00:11,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2549 transitions. [2022-12-13 12:00:11,551 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38621212121212123 [2022-12-13 12:00:11,552 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2549 transitions. [2022-12-13 12:00:11,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2549 transitions. [2022-12-13 12:00:11,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:00:11,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2549 transitions. [2022-12-13 12:00:11,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 101.96) internal successors, (2549), 25 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:11,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 264.0) internal successors, (6864), 26 states have internal predecessors, (6864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:11,556 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 264.0) internal successors, (6864), 26 states have internal predecessors, (6864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:11,557 INFO L175 Difference]: Start difference. First operand has 424 places, 585 transitions, 11705 flow. Second operand 25 states and 2549 transitions. [2022-12-13 12:00:11,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 1070 transitions, 21178 flow [2022-12-13 12:00:14,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 1070 transitions, 20891 flow, removed 2 selfloop flow, removed 16 redundant places. [2022-12-13 12:00:14,055 INFO L231 Difference]: Finished difference. Result has 434 places, 589 transitions, 12229 flow [2022-12-13 12:00:14,055 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=11418, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=12229, PETRI_PLACES=434, PETRI_TRANSITIONS=589} [2022-12-13 12:00:14,056 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 395 predicate places. [2022-12-13 12:00:14,056 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 589 transitions, 12229 flow [2022-12-13 12:00:14,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 94.40425531914893) internal successors, (4437), 47 states have internal predecessors, (4437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:14,056 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:00:14,056 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:00:14,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-12-13 12:00:14,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:00:14,257 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:00:14,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:00:14,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2019842363, now seen corresponding path program 6 times [2022-12-13 12:00:14,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:00:14,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532300179] [2022-12-13 12:00:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:00:14,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:00:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:00:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:00:14,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:00:14,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532300179] [2022-12-13 12:00:14,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532300179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:00:14,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461713676] [2022-12-13 12:00:14,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:00:14,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:00:14,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:00:14,438 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:00:14,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-13 12:00:14,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-13 12:00:14,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:00:14,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 12:00:14,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:00:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:00:14,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:00:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:00:14,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461713676] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:00:14,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:00:14,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-12-13 12:00:14,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119443254] [2022-12-13 12:00:14,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:00:14,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 12:00:14,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:00:14,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 12:00:14,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 12:00:15,271 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 264 [2022-12-13 12:00:15,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 589 transitions, 12229 flow. Second operand has 34 states, 34 states have (on average 106.5) internal successors, (3621), 34 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:15,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:00:15,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 264 [2022-12-13 12:00:15,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:00:25,510 INFO L130 PetriNetUnfolder]: 24930/42440 cut-off events. [2022-12-13 12:00:25,510 INFO L131 PetriNetUnfolder]: For 969126/969550 co-relation queries the response was YES. [2022-12-13 12:00:25,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382330 conditions, 42440 events. 24930/42440 cut-off events. For 969126/969550 co-relation queries the response was YES. Maximal size of possible extension queue 984. Compared 342151 event pairs, 6694 based on Foata normal form. 1196/42976 useless extension candidates. Maximal degree in co-relation 382253. Up to 15936 conditions per place. [2022-12-13 12:00:25,939 INFO L137 encePairwiseOnDemand]: 256/264 looper letters, 1914 selfloop transitions, 48 changer transitions 168/2138 dead transitions. [2022-12-13 12:00:25,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 2138 transitions, 55877 flow [2022-12-13 12:00:25,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 12:00:25,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 12:00:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3679 transitions. [2022-12-13 12:00:25,942 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4222910927456382 [2022-12-13 12:00:25,942 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3679 transitions. [2022-12-13 12:00:25,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3679 transitions. [2022-12-13 12:00:25,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:00:25,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3679 transitions. [2022-12-13 12:00:25,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 111.48484848484848) internal successors, (3679), 33 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:25,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 264.0) internal successors, (8976), 34 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:25,948 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 264.0) internal successors, (8976), 34 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:25,948 INFO L175 Difference]: Start difference. First operand has 434 places, 589 transitions, 12229 flow. Second operand 33 states and 3679 transitions. [2022-12-13 12:00:25,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 2138 transitions, 55877 flow [2022-12-13 12:00:27,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 2138 transitions, 53334 flow, removed 9 selfloop flow, removed 17 redundant places. [2022-12-13 12:00:27,903 INFO L231 Difference]: Finished difference. Result has 452 places, 561 transitions, 11488 flow [2022-12-13 12:00:27,903 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=11556, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=11488, PETRI_PLACES=452, PETRI_TRANSITIONS=561} [2022-12-13 12:00:27,904 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 413 predicate places. [2022-12-13 12:00:27,904 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 561 transitions, 11488 flow [2022-12-13 12:00:27,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 106.5) internal successors, (3621), 34 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:27,904 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:00:27,904 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 12:00:27,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-13 12:00:28,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-12-13 12:00:28,105 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:00:28,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:00:28,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1903341745, now seen corresponding path program 5 times [2022-12-13 12:00:28,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:00:28,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421782671] [2022-12-13 12:00:28,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:00:28,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:00:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:00:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:00:28,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:00:28,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421782671] [2022-12-13 12:00:28,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421782671] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:00:28,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260098826] [2022-12-13 12:00:28,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:00:28,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:00:28,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:00:28,550 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:00:28,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-13 12:00:28,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-13 12:00:28,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:00:28,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 12:00:28,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:00:28,838 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 12:00:28,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:00:28,875 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 16 treesize of output 18 [2022-12-13 12:00:28,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:00:28,909 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 16 treesize of output 18 [2022-12-13 12:00:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:00:29,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:00:29,291 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1947 (Array Int Int)) (v_ArrVal_1946 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1946) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1947) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2022-12-13 12:00:29,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:00:29,298 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 27 treesize of output 28 [2022-12-13 12:00:29,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:00:29,304 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 141 treesize of output 131 [2022-12-13 12:00:29,307 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 118 treesize of output 102 [2022-12-13 12:00:29,310 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 102 treesize of output 94 [2022-12-13 12:00:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-13 12:00:29,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260098826] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:00:29,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:00:29,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2022-12-13 12:00:29,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691729959] [2022-12-13 12:00:29,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:00:29,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 12:00:29,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:00:29,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 12:00:29,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1923, Unknown=10, NotChecked=88, Total=2162 [2022-12-13 12:00:29,629 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 12:00:29,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 561 transitions, 11488 flow. Second operand has 47 states, 47 states have (on average 89.40425531914893) internal successors, (4202), 47 states have internal predecessors, (4202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:29,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:00:29,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 12:00:29,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:00:40,697 INFO L130 PetriNetUnfolder]: 21755/37015 cut-off events. [2022-12-13 12:00:40,697 INFO L131 PetriNetUnfolder]: For 675046/678058 co-relation queries the response was YES. [2022-12-13 12:00:40,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343076 conditions, 37015 events. 21755/37015 cut-off events. For 675046/678058 co-relation queries the response was YES. Maximal size of possible extension queue 896. Compared 293646 event pairs, 6727 based on Foata normal form. 3186/40196 useless extension candidates. Maximal degree in co-relation 342999. Up to 10488 conditions per place. [2022-12-13 12:00:41,103 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 719 selfloop transitions, 305 changer transitions 0/1027 dead transitions. [2022-12-13 12:00:41,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 1027 transitions, 20566 flow [2022-12-13 12:00:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 12:00:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 12:00:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2416 transitions. [2022-12-13 12:00:41,105 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3660606060606061 [2022-12-13 12:00:41,105 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2416 transitions. [2022-12-13 12:00:41,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2416 transitions. [2022-12-13 12:00:41,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:00:41,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2416 transitions. [2022-12-13 12:00:41,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 96.64) internal successors, (2416), 25 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:41,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 264.0) internal successors, (6864), 26 states have internal predecessors, (6864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:41,110 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 264.0) internal successors, (6864), 26 states have internal predecessors, (6864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:41,110 INFO L175 Difference]: Start difference. First operand has 452 places, 561 transitions, 11488 flow. Second operand 25 states and 2416 transitions. [2022-12-13 12:00:41,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 1027 transitions, 20566 flow [2022-12-13 12:00:43,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1027 transitions, 20131 flow, removed 11 selfloop flow, removed 19 redundant places. [2022-12-13 12:00:43,794 INFO L231 Difference]: Finished difference. Result has 451 places, 559 transitions, 11776 flow [2022-12-13 12:00:43,794 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=11166, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11776, PETRI_PLACES=451, PETRI_TRANSITIONS=559} [2022-12-13 12:00:43,794 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 412 predicate places. [2022-12-13 12:00:43,794 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 559 transitions, 11776 flow [2022-12-13 12:00:43,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 89.40425531914893) internal successors, (4202), 47 states have internal predecessors, (4202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:43,795 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:00:43,795 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:00:43,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-13 12:00:43,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:00:43,996 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:00:43,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:00:43,997 INFO L85 PathProgramCache]: Analyzing trace with hash -326106211, now seen corresponding path program 7 times [2022-12-13 12:00:43,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:00:43,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350695589] [2022-12-13 12:00:43,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:00:43,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:00:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:00:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:00:44,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:00:44,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350695589] [2022-12-13 12:00:44,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350695589] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:00:44,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173652777] [2022-12-13 12:00:44,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:00:44,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:00:44,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:00:44,438 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:00:44,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-13 12:00:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:00:44,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 12:00:44,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:00:44,783 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 13 treesize of output 9 [2022-12-13 12:00:44,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:00:44,818 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 12:00:44,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:00:44,853 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 12:00:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:00:45,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:00:45,257 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2001 (Array Int Int)) (v_ArrVal_2000 (Array Int Int))) (< 0 (+ 4294967296 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2000) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2001) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2022-12-13 12:00:45,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:00:45,263 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 12:00:45,268 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:00:45,268 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 81 treesize of output 77 [2022-12-13 12:00:45,271 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 32 treesize of output 28 [2022-12-13 12:00:45,273 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 58 treesize of output 50 [2022-12-13 12:00:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-13 12:00:45,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173652777] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:00:45,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:00:45,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2022-12-13 12:00:45,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236086503] [2022-12-13 12:00:45,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:00:45,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 12:00:45,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:00:45,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 12:00:45,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1922, Unknown=10, NotChecked=88, Total=2162 [2022-12-13 12:00:45,513 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 12:00:45,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 559 transitions, 11776 flow. Second operand has 47 states, 47 states have (on average 89.46808510638297) internal successors, (4205), 47 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:45,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:00:45,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 12:00:45,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:00:57,004 INFO L130 PetriNetUnfolder]: 22559/38880 cut-off events. [2022-12-13 12:00:57,004 INFO L131 PetriNetUnfolder]: For 904364/904731 co-relation queries the response was YES. [2022-12-13 12:00:57,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364811 conditions, 38880 events. 22559/38880 cut-off events. For 904364/904731 co-relation queries the response was YES. Maximal size of possible extension queue 896. Compared 312279 event pairs, 6394 based on Foata normal form. 1127/39462 useless extension candidates. Maximal degree in co-relation 364735. Up to 11266 conditions per place. [2022-12-13 12:00:57,504 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 1695 selfloop transitions, 68 changer transitions 0/1771 dead transitions. [2022-12-13 12:00:57,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 1771 transitions, 49458 flow [2022-12-13 12:00:57,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 12:00:57,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 12:00:57,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2398 transitions. [2022-12-13 12:00:57,507 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36333333333333334 [2022-12-13 12:00:57,507 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2398 transitions. [2022-12-13 12:00:57,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2398 transitions. [2022-12-13 12:00:57,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:00:57,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2398 transitions. [2022-12-13 12:00:57,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 95.92) internal successors, (2398), 25 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:57,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 264.0) internal successors, (6864), 26 states have internal predecessors, (6864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:57,512 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 264.0) internal successors, (6864), 26 states have internal predecessors, (6864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:57,512 INFO L175 Difference]: Start difference. First operand has 451 places, 559 transitions, 11776 flow. Second operand 25 states and 2398 transitions. [2022-12-13 12:00:57,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 1771 transitions, 49458 flow [2022-12-13 12:00:59,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 1771 transitions, 47298 flow, removed 14 selfloop flow, removed 23 redundant places. [2022-12-13 12:00:59,400 INFO L231 Difference]: Finished difference. Result has 453 places, 561 transitions, 11398 flow [2022-12-13 12:00:59,400 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=11187, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11398, PETRI_PLACES=453, PETRI_TRANSITIONS=561} [2022-12-13 12:00:59,401 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 414 predicate places. [2022-12-13 12:00:59,401 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 561 transitions, 11398 flow [2022-12-13 12:00:59,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 89.46808510638297) internal successors, (4205), 47 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:59,401 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:00:59,401 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:00:59,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-12-13 12:00:59,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:00:59,602 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:00:59,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:00:59,603 INFO L85 PathProgramCache]: Analyzing trace with hash -326106212, now seen corresponding path program 6 times [2022-12-13 12:00:59,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:00:59,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428140611] [2022-12-13 12:00:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:00:59,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:00:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:01:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:01:00,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:01:00,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428140611] [2022-12-13 12:01:00,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428140611] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:01:00,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838003326] [2022-12-13 12:01:00,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:01:00,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:01:00,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:01:00,269 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:01:00,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-13 12:01:00,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-13 12:01:00,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:01:00,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 12:01:00,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:01:00,724 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 12:01:00,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:01:00,780 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 12:01:00,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:01:00,829 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 12:01:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:01:01,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:01:01,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:01:01,565 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 12:01:01,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:01:01,573 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 12:01:01,577 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 12:01:01,580 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 12:01:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:01:02,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838003326] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:01:02,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:01:02,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2022-12-13 12:01:02,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596137246] [2022-12-13 12:01:02,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:01:02,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 12:01:02,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:01:02,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 12:01:02,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1939, Unknown=4, NotChecked=0, Total=2162 [2022-12-13 12:01:03,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:01:05,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:01:06,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:01:08,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:01:08,188 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 264 [2022-12-13 12:01:08,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 561 transitions, 11398 flow. Second operand has 47 states, 47 states have (on average 80.46808510638297) internal successors, (3782), 47 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:01:08,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:01:08,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 264 [2022-12-13 12:01:08,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:01:09,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:01:56,989 INFO L130 PetriNetUnfolder]: 33115/57461 cut-off events. [2022-12-13 12:01:56,989 INFO L131 PetriNetUnfolder]: For 1376165/1376982 co-relation queries the response was YES. [2022-12-13 12:01:57,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535978 conditions, 57461 events. 33115/57461 cut-off events. For 1376165/1376982 co-relation queries the response was YES. Maximal size of possible extension queue 1311. Compared 498283 event pairs, 1769 based on Foata normal form. 2455/59912 useless extension candidates. Maximal degree in co-relation 535902. Up to 15921 conditions per place. [2022-12-13 12:01:57,697 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 4840 selfloop transitions, 146 changer transitions 122/5116 dead transitions. [2022-12-13 12:01:57,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 5116 transitions, 138829 flow [2022-12-13 12:01:57,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-13 12:01:57,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-12-13 12:01:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 8330 transitions. [2022-12-13 12:01:57,704 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.328677398989899 [2022-12-13 12:01:57,704 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 8330 transitions. [2022-12-13 12:01:57,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 8330 transitions. [2022-12-13 12:01:57,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:01:57,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 8330 transitions. [2022-12-13 12:01:57,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 86.77083333333333) internal successors, (8330), 96 states have internal predecessors, (8330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:01:57,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 264.0) internal successors, (25608), 97 states have internal predecessors, (25608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:01:57,723 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 264.0) internal successors, (25608), 97 states have internal predecessors, (25608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:01:57,724 INFO L175 Difference]: Start difference. First operand has 453 places, 561 transitions, 11398 flow. Second operand 96 states and 8330 transitions. [2022-12-13 12:01:57,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 5116 transitions, 138829 flow [2022-12-13 12:02:00,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 5116 transitions, 138621 flow, removed 9 selfloop flow, removed 18 redundant places. [2022-12-13 12:02:00,662 INFO L231 Difference]: Finished difference. Result has 533 places, 624 transitions, 12653 flow [2022-12-13 12:02:00,662 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=11264, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=12653, PETRI_PLACES=533, PETRI_TRANSITIONS=624} [2022-12-13 12:02:00,662 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 494 predicate places. [2022-12-13 12:02:00,663 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 624 transitions, 12653 flow [2022-12-13 12:02:00,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 80.46808510638297) internal successors, (3782), 47 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:00,663 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:02:00,663 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1] [2022-12-13 12:02:00,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-12-13 12:02:00,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-12-13 12:02:00,864 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:02:00,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:00,865 INFO L85 PathProgramCache]: Analyzing trace with hash -446013051, now seen corresponding path program 5 times [2022-12-13 12:02:00,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:02:00,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835450577] [2022-12-13 12:02:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:00,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:02:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:02:01,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:02:01,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835450577] [2022-12-13 12:02:01,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835450577] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:02:01,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356051718] [2022-12-13 12:02:01,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:02:01,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:02:01,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:02:01,244 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:02:01,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-13 12:02:01,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-13 12:02:01,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:02:01,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:02:01,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:02:01,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:02:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:02:01,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356051718] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:02:01,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:02:01,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-12-13 12:02:01,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448698578] [2022-12-13 12:02:01,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:02:01,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 12:02:01,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:02:01,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 12:02:01,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 12:02:02,120 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 264 [2022-12-13 12:02:02,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 624 transitions, 12653 flow. Second operand has 39 states, 39 states have (on average 106.43589743589743) internal successors, (4151), 39 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:02,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:02:02,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 264 [2022-12-13 12:02:02,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:02:12,797 INFO L130 PetriNetUnfolder]: 24251/42935 cut-off events. [2022-12-13 12:02:12,798 INFO L131 PetriNetUnfolder]: For 918187/920020 co-relation queries the response was YES. [2022-12-13 12:02:13,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400932 conditions, 42935 events. 24251/42935 cut-off events. For 918187/920020 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 365215 event pairs, 8918 based on Foata normal form. 2772/45010 useless extension candidates. Maximal degree in co-relation 400855. Up to 14085 conditions per place. [2022-12-13 12:02:13,258 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 617 selfloop transitions, 89 changer transitions 627/1336 dead transitions. [2022-12-13 12:02:13,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 1336 transitions, 26718 flow [2022-12-13 12:02:13,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 12:02:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-13 12:02:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4503 transitions. [2022-12-13 12:02:13,262 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4264204545454545 [2022-12-13 12:02:13,262 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4503 transitions. [2022-12-13 12:02:13,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4503 transitions. [2022-12-13 12:02:13,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:02:13,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4503 transitions. [2022-12-13 12:02:13,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 112.575) internal successors, (4503), 40 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:13,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 264.0) internal successors, (10824), 41 states have internal predecessors, (10824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:13,270 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 264.0) internal successors, (10824), 41 states have internal predecessors, (10824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:13,270 INFO L175 Difference]: Start difference. First operand has 533 places, 624 transitions, 12653 flow. Second operand 40 states and 4503 transitions. [2022-12-13 12:02:13,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 1336 transitions, 26718 flow [2022-12-13 12:02:16,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 1336 transitions, 22492 flow, removed 106 selfloop flow, removed 58 redundant places. [2022-12-13 12:02:16,191 INFO L231 Difference]: Finished difference. Result has 521 places, 352 transitions, 6447 flow [2022-12-13 12:02:16,191 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=9345, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=6447, PETRI_PLACES=521, PETRI_TRANSITIONS=352} [2022-12-13 12:02:16,192 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 482 predicate places. [2022-12-13 12:02:16,192 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 352 transitions, 6447 flow [2022-12-13 12:02:16,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 106.43589743589743) internal successors, (4151), 39 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:16,192 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:02:16,192 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1] [2022-12-13 12:02:16,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-13 12:02:16,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-13 12:02:16,393 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:02:16,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:16,394 INFO L85 PathProgramCache]: Analyzing trace with hash -155974813, now seen corresponding path program 6 times [2022-12-13 12:02:16,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:02:16,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320475667] [2022-12-13 12:02:16,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:16,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:02:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:02:16,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:02:16,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320475667] [2022-12-13 12:02:16,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320475667] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:02:16,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841987974] [2022-12-13 12:02:16,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:02:16,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:02:16,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:02:16,841 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:02:16,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-13 12:02:17,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-13 12:02:17,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:02:17,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 12:02:17,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:17,788 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 12:02:17,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:02:17,835 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 12:02:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:02:18,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:02:18,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:02:18,612 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 26 treesize of output 27 [2022-12-13 12:02:18,620 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:02:18,620 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 41 treesize of output 37 [2022-12-13 12:02:18,623 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 13 treesize of output 7 [2022-12-13 12:02:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:02:19,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841987974] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:02:19,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:02:19,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2022-12-13 12:02:19,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895237767] [2022-12-13 12:02:19,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:02:19,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 12:02:19,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:02:19,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 12:02:19,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2188, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 12:02:23,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:02:24,060 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 264 [2022-12-13 12:02:24,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 352 transitions, 6447 flow. Second operand has 50 states, 50 states have (on average 97.44) internal successors, (4872), 50 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:24,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:02:24,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 264 [2022-12-13 12:02:24,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:02:25,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:02:30,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 12:02:48,346 INFO L130 PetriNetUnfolder]: 20690/35811 cut-off events. [2022-12-13 12:02:48,346 INFO L131 PetriNetUnfolder]: For 597808/598841 co-relation queries the response was YES. [2022-12-13 12:02:48,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315926 conditions, 35811 events. 20690/35811 cut-off events. For 597808/598841 co-relation queries the response was YES. Maximal size of possible extension queue 860. Compared 290632 event pairs, 5600 based on Foata normal form. 1214/35337 useless extension candidates. Maximal degree in co-relation 315858. Up to 9869 conditions per place. [2022-12-13 12:02:48,711 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 974 selfloop transitions, 327 changer transitions 21/1325 dead transitions. [2022-12-13 12:02:48,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1325 transitions, 23633 flow [2022-12-13 12:02:48,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-12-13 12:02:48,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2022-12-13 12:02:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 12103 transitions. [2022-12-13 12:02:48,718 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3788817931379915 [2022-12-13 12:02:48,718 INFO L72 ComplementDD]: Start complementDD. Operand 121 states and 12103 transitions. [2022-12-13 12:02:48,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 12103 transitions. [2022-12-13 12:02:48,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:02:48,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 121 states and 12103 transitions. [2022-12-13 12:02:48,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 122 states, 121 states have (on average 100.02479338842976) internal successors, (12103), 121 states have internal predecessors, (12103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:48,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 122 states, 122 states have (on average 264.0) internal successors, (32208), 122 states have internal predecessors, (32208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:48,742 INFO L81 ComplementDD]: Finished complementDD. Result has 122 states, 122 states have (on average 264.0) internal successors, (32208), 122 states have internal predecessors, (32208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:48,742 INFO L175 Difference]: Start difference. First operand has 521 places, 352 transitions, 6447 flow. Second operand 121 states and 12103 transitions. [2022-12-13 12:02:48,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1325 transitions, 23633 flow [2022-12-13 12:02:51,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 1325 transitions, 19521 flow, removed 4 selfloop flow, removed 34 redundant places. [2022-12-13 12:02:51,286 INFO L231 Difference]: Finished difference. Result has 468 places, 468 transitions, 7921 flow [2022-12-13 12:02:51,286 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=5159, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=7921, PETRI_PLACES=468, PETRI_TRANSITIONS=468} [2022-12-13 12:02:51,287 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 429 predicate places. [2022-12-13 12:02:51,287 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 468 transitions, 7921 flow [2022-12-13 12:02:51,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 97.44) internal successors, (4872), 50 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:51,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:02:51,287 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:02:51,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-13 12:02:51,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-13 12:02:51,488 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:02:51,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:51,489 INFO L85 PathProgramCache]: Analyzing trace with hash 144570435, now seen corresponding path program 8 times [2022-12-13 12:02:51,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:02:51,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612430280] [2022-12-13 12:02:51,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:51,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:02:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:02:51,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:02:51,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612430280] [2022-12-13 12:02:51,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612430280] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:02:51,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966791622] [2022-12-13 12:02:51,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:02:51,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:02:51,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:02:51,679 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:02:51,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-13 12:02:51,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:02:51,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:02:51,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:02:51,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:02:52,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:02:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:02:52,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966791622] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:02:52,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:02:52,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-12-13 12:02:52,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334106720] [2022-12-13 12:02:52,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:02:52,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 12:02:52,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:02:52,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 12:02:52,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 12:02:52,592 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 264 [2022-12-13 12:02:52,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 468 transitions, 7921 flow. Second operand has 39 states, 39 states have (on average 106.48717948717949) internal successors, (4153), 39 states have internal predecessors, (4153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:52,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:02:52,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 264 [2022-12-13 12:02:52,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:02:59,992 INFO L130 PetriNetUnfolder]: 20429/35454 cut-off events. [2022-12-13 12:02:59,992 INFO L131 PetriNetUnfolder]: For 528073/528609 co-relation queries the response was YES. [2022-12-13 12:03:00,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274256 conditions, 35454 events. 20429/35454 cut-off events. For 528073/528609 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 282710 event pairs, 8724 based on Foata normal form. 900/34728 useless extension candidates. Maximal degree in co-relation 274178. Up to 21462 conditions per place. [2022-12-13 12:03:00,547 INFO L137 encePairwiseOnDemand]: 256/264 looper letters, 404 selfloop transitions, 22 changer transitions 495/925 dead transitions. [2022-12-13 12:03:00,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 925 transitions, 19553 flow [2022-12-13 12:03:00,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 12:03:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 12:03:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1995 transitions. [2022-12-13 12:03:00,549 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4198232323232323 [2022-12-13 12:03:00,549 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1995 transitions. [2022-12-13 12:03:00,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1995 transitions. [2022-12-13 12:03:00,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:03:00,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1995 transitions. [2022-12-13 12:03:00,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 110.83333333333333) internal successors, (1995), 18 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:00,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 264.0) internal successors, (5016), 19 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:00,553 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 264.0) internal successors, (5016), 19 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:00,553 INFO L175 Difference]: Start difference. First operand has 468 places, 468 transitions, 7921 flow. Second operand 18 states and 1995 transitions. [2022-12-13 12:03:00,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 925 transitions, 19553 flow [2022-12-13 12:03:03,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 925 transitions, 18135 flow, removed 167 selfloop flow, removed 71 redundant places. [2022-12-13 12:03:03,322 INFO L231 Difference]: Finished difference. Result has 414 places, 340 transitions, 5210 flow [2022-12-13 12:03:03,323 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=7176, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5210, PETRI_PLACES=414, PETRI_TRANSITIONS=340} [2022-12-13 12:03:03,323 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 375 predicate places. [2022-12-13 12:03:03,323 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 340 transitions, 5210 flow [2022-12-13 12:03:03,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 106.48717948717949) internal successors, (4153), 39 states have internal predecessors, (4153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:03,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:03:03,323 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-13 12:03:03,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-12-13 12:03:03,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-13 12:03:03,525 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:03:03,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:03:03,525 INFO L85 PathProgramCache]: Analyzing trace with hash 945921823, now seen corresponding path program 6 times [2022-12-13 12:03:03,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:03:03,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118950976] [2022-12-13 12:03:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:03:03,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:03:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:03:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:03:04,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:03:04,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118950976] [2022-12-13 12:03:04,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118950976] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:03:04,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136066783] [2022-12-13 12:03:04,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:03:04,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:03:04,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:03:04,037 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:03:04,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-13 12:03:04,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-13 12:03:04,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:03:04,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 12:03:04,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:03:04,622 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 12:03:04,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:03:04,701 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 12:03:04,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:03:04,769 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 12:03:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:03:05,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:03:05,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:03:05,985 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 12:03:05,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:03:05,993 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 12:03:05,998 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 12:03:06,003 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 12:03:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:03:06,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136066783] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:03:06,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:03:06,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-12-13 12:03:06,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818892882] [2022-12-13 12:03:06,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:03:06,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-13 12:03:06,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:03:06,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-13 12:03:06,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2483, Unknown=1, NotChecked=0, Total=2756 [2022-12-13 12:03:12,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:03:12,669 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 264 [2022-12-13 12:03:12,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 340 transitions, 5210 flow. Second operand has 53 states, 53 states have (on average 80.41509433962264) internal successors, (4262), 53 states have internal predecessors, (4262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:12,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:03:12,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 264 [2022-12-13 12:03:12,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:03:14,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:03:54,893 INFO L130 PetriNetUnfolder]: 22412/39262 cut-off events. [2022-12-13 12:03:54,893 INFO L131 PetriNetUnfolder]: For 491590/493098 co-relation queries the response was YES. [2022-12-13 12:03:55,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301838 conditions, 39262 events. 22412/39262 cut-off events. For 491590/493098 co-relation queries the response was YES. Maximal size of possible extension queue 986. Compared 330468 event pairs, 4634 based on Foata normal form. 2314/41574 useless extension candidates. Maximal degree in co-relation 301768. Up to 10367 conditions per place. [2022-12-13 12:03:55,288 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 2006 selfloop transitions, 268 changer transitions 119/2395 dead transitions. [2022-12-13 12:03:55,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 2395 transitions, 35457 flow [2022-12-13 12:03:55,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-12-13 12:03:55,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-12-13 12:03:55,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 6536 transitions. [2022-12-13 12:03:55,294 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3345618345618346 [2022-12-13 12:03:55,294 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 6536 transitions. [2022-12-13 12:03:55,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 6536 transitions. [2022-12-13 12:03:55,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:03:55,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 6536 transitions. [2022-12-13 12:03:55,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 88.32432432432432) internal successors, (6536), 74 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:55,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 264.0) internal successors, (19800), 75 states have internal predecessors, (19800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:55,307 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 264.0) internal successors, (19800), 75 states have internal predecessors, (19800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:55,307 INFO L175 Difference]: Start difference. First operand has 414 places, 340 transitions, 5210 flow. Second operand 74 states and 6536 transitions. [2022-12-13 12:03:55,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 2395 transitions, 35457 flow [2022-12-13 12:04:04,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 2395 transitions, 34616 flow, removed 96 selfloop flow, removed 21 redundant places. [2022-12-13 12:04:04,127 INFO L231 Difference]: Finished difference. Result has 398 places, 442 transitions, 7793 flow [2022-12-13 12:04:04,127 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=5035, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=7793, PETRI_PLACES=398, PETRI_TRANSITIONS=442} [2022-12-13 12:04:04,127 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 359 predicate places. [2022-12-13 12:04:04,127 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 442 transitions, 7793 flow [2022-12-13 12:04:04,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 80.41509433962264) internal successors, (4262), 53 states have internal predecessors, (4262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:04,128 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:04:04,128 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1] [2022-12-13 12:04:04,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-12-13 12:04:04,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-12-13 12:04:04,329 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:04:04,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:04:04,330 INFO L85 PathProgramCache]: Analyzing trace with hash 245275972, now seen corresponding path program 9 times [2022-12-13 12:04:04,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:04:04,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882188225] [2022-12-13 12:04:04,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:04,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:04:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:04:04,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:04:04,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882188225] [2022-12-13 12:04:04,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882188225] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:04:04,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729623691] [2022-12-13 12:04:04,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:04:04,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:04:04,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:04:04,848 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:04:04,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-13 12:04:05,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 12:04:05,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:04:05,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 12:04:05,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:04:05,315 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 12:04:05,356 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 12:04:05,357 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 1 case distinctions, treesize of input 27 treesize of output 26 [2022-12-13 12:04:05,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:04:05,389 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 12:04:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:04:05,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:04:06,030 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 12:04:06,030 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 33 treesize of output 39 [2022-12-13 12:04:06,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:04:06,036 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 43 treesize of output 39 [2022-12-13 12:04:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:04:06,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729623691] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:04:06,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:04:06,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-12-13 12:04:06,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546170134] [2022-12-13 12:04:06,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:04:06,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-13 12:04:06,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:04:06,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-13 12:04:06,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2565, Unknown=29, NotChecked=0, Total=2756 [2022-12-13 12:04:08,925 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 264 [2022-12-13 12:04:08,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 442 transitions, 7793 flow. Second operand has 53 states, 53 states have (on average 94.41509433962264) internal successors, (5004), 53 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:08,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:04:08,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 264 [2022-12-13 12:04:08,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:04:18,340 INFO L130 PetriNetUnfolder]: 22362/39114 cut-off events. [2022-12-13 12:04:18,340 INFO L131 PetriNetUnfolder]: For 474101/475348 co-relation queries the response was YES. [2022-12-13 12:04:18,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310265 conditions, 39114 events. 22362/39114 cut-off events. For 474101/475348 co-relation queries the response was YES. Maximal size of possible extension queue 978. Compared 322960 event pairs, 11404 based on Foata normal form. 1249/38073 useless extension candidates. Maximal degree in co-relation 310200. Up to 30132 conditions per place. [2022-12-13 12:04:18,704 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 300 selfloop transitions, 243 changer transitions 0/545 dead transitions. [2022-12-13 12:04:18,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 545 transitions, 10163 flow [2022-12-13 12:04:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 12:04:18,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 12:04:18,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2695 transitions. [2022-12-13 12:04:18,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3645833333333333 [2022-12-13 12:04:18,706 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2695 transitions. [2022-12-13 12:04:18,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2695 transitions. [2022-12-13 12:04:18,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:04:18,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2695 transitions. [2022-12-13 12:04:18,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 96.25) internal successors, (2695), 28 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:18,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 264.0) internal successors, (7656), 29 states have internal predecessors, (7656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:18,711 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 264.0) internal successors, (7656), 29 states have internal predecessors, (7656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:18,711 INFO L175 Difference]: Start difference. First operand has 398 places, 442 transitions, 7793 flow. Second operand 28 states and 2695 transitions. [2022-12-13 12:04:18,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 545 transitions, 10163 flow [2022-12-13 12:04:21,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 545 transitions, 9077 flow, removed 33 selfloop flow, removed 35 redundant places. [2022-12-13 12:04:21,568 INFO L231 Difference]: Finished difference. Result has 391 places, 443 transitions, 7236 flow [2022-12-13 12:04:21,568 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=6691, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7236, PETRI_PLACES=391, PETRI_TRANSITIONS=443} [2022-12-13 12:04:21,568 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 352 predicate places. [2022-12-13 12:04:21,569 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 443 transitions, 7236 flow [2022-12-13 12:04:21,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 94.41509433962264) internal successors, (5004), 53 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:21,569 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:04:21,569 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-13 12:04:21,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-12-13 12:04:21,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:04:21,770 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:04:21,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:04:21,771 INFO L85 PathProgramCache]: Analyzing trace with hash 945921822, now seen corresponding path program 6 times [2022-12-13 12:04:21,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:04:21,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883525261] [2022-12-13 12:04:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:21,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:04:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:04:22,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:04:22,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883525261] [2022-12-13 12:04:22,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883525261] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:04:22,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926951622] [2022-12-13 12:04:22,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:04:22,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:04:22,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:04:22,262 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:04:22,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-13 12:04:22,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-13 12:04:22,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:04:22,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 12:04:22,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:04:22,896 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 12:04:22,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:04:22,952 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 12:04:23,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:04:23,008 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 12:04:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:04:23,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:04:24,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:04:24,006 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 12:04:24,015 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:04:24,015 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 175 treesize of output 163 [2022-12-13 12:04:24,020 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 146 treesize of output 134 [2022-12-13 12:04:24,024 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 134 treesize of output 110 [2022-12-13 12:04:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:04:24,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926951622] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:04:24,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:04:24,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-12-13 12:04:24,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800323286] [2022-12-13 12:04:24,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:04:24,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-13 12:04:24,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:04:24,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-13 12:04:24,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2481, Unknown=3, NotChecked=0, Total=2756 [2022-12-13 12:04:25,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:04:29,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:04:29,379 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 264 [2022-12-13 12:04:29,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 443 transitions, 7236 flow. Second operand has 53 states, 53 states have (on average 80.41509433962264) internal successors, (4262), 53 states have internal predecessors, (4262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:29,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:04:29,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 264 [2022-12-13 12:04:29,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:04:30,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:04:51,528 INFO L130 PetriNetUnfolder]: 20893/36658 cut-off events. [2022-12-13 12:04:51,529 INFO L131 PetriNetUnfolder]: For 396212/397632 co-relation queries the response was YES. [2022-12-13 12:04:51,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279205 conditions, 36658 events. 20893/36658 cut-off events. For 396212/397632 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 306010 event pairs, 4265 based on Foata normal form. 2402/37006 useless extension candidates. Maximal degree in co-relation 279146. Up to 10003 conditions per place. [2022-12-13 12:04:51,896 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 2002 selfloop transitions, 264 changer transitions 119/2387 dead transitions. [2022-12-13 12:04:51,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 2387 transitions, 34546 flow [2022-12-13 12:04:51,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-13 12:04:51,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-12-13 12:04:51,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 6613 transitions. [2022-12-13 12:04:51,901 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.333989898989899 [2022-12-13 12:04:51,901 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 6613 transitions. [2022-12-13 12:04:51,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 6613 transitions. [2022-12-13 12:04:51,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:04:51,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 6613 transitions. [2022-12-13 12:04:51,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 88.17333333333333) internal successors, (6613), 75 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:51,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 264.0) internal successors, (20064), 76 states have internal predecessors, (20064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:51,914 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 264.0) internal successors, (20064), 76 states have internal predecessors, (20064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:51,914 INFO L175 Difference]: Start difference. First operand has 391 places, 443 transitions, 7236 flow. Second operand 75 states and 6613 transitions. [2022-12-13 12:04:51,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 2387 transitions, 34546 flow [2022-12-13 12:04:54,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 2387 transitions, 34042 flow, removed 2 selfloop flow, removed 24 redundant places. [2022-12-13 12:04:54,219 INFO L231 Difference]: Finished difference. Result has 442 places, 436 transitions, 7150 flow [2022-12-13 12:04:54,219 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=6601, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=7150, PETRI_PLACES=442, PETRI_TRANSITIONS=436} [2022-12-13 12:04:54,220 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 403 predicate places. [2022-12-13 12:04:54,220 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 436 transitions, 7150 flow [2022-12-13 12:04:54,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 80.41509433962264) internal successors, (4262), 53 states have internal predecessors, (4262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:54,220 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:04:54,220 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:04:54,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-13 12:04:54,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:04:54,421 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:04:54,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:04:54,421 INFO L85 PathProgramCache]: Analyzing trace with hash -301557087, now seen corresponding path program 9 times [2022-12-13 12:04:54,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:04:54,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569156050] [2022-12-13 12:04:54,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:54,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:04:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:04:55,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:04:55,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569156050] [2022-12-13 12:04:55,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569156050] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:04:55,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637518596] [2022-12-13 12:04:55,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:04:55,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:04:55,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:04:55,017 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:04:55,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-13 12:04:55,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 12:04:55,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:04:55,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 12:04:55,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:04:55,802 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 12:04:55,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:04:55,858 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 12:04:55,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:04:55,922 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 12:04:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:04:56,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:04:57,074 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:04:57,074 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 12:04:57,082 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:04:57,082 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 175 treesize of output 163 [2022-12-13 12:04:57,086 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 146 treesize of output 134 [2022-12-13 12:04:57,090 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 134 treesize of output 110 [2022-12-13 12:04:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:04:57,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637518596] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:04:57,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:04:57,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-12-13 12:04:57,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818179124] [2022-12-13 12:04:57,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:04:57,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-13 12:04:57,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:04:57,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-13 12:04:57,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2481, Unknown=3, NotChecked=0, Total=2756 [2022-12-13 12:04:59,235 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 264 [2022-12-13 12:04:59,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 436 transitions, 7150 flow. Second operand has 53 states, 53 states have (on average 80.47169811320755) internal successors, (4265), 53 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:59,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:04:59,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 264 [2022-12-13 12:04:59,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:05:00,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:05:22,090 INFO L130 PetriNetUnfolder]: 23681/41354 cut-off events. [2022-12-13 12:05:22,090 INFO L131 PetriNetUnfolder]: For 531936/532323 co-relation queries the response was YES. [2022-12-13 12:05:22,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320026 conditions, 41354 events. 23681/41354 cut-off events. For 531936/532323 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 343994 event pairs, 1359 based on Foata normal form. 1803/41081 useless extension candidates. Maximal degree in co-relation 319967. Up to 11136 conditions per place. [2022-12-13 12:05:22,514 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 3164 selfloop transitions, 110 changer transitions 481/3761 dead transitions. [2022-12-13 12:05:22,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 3761 transitions, 82383 flow [2022-12-13 12:05:22,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-12-13 12:05:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-12-13 12:05:22,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 6438 transitions. [2022-12-13 12:05:22,519 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32954545454545453 [2022-12-13 12:05:22,519 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 6438 transitions. [2022-12-13 12:05:22,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 6438 transitions. [2022-12-13 12:05:22,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:05:22,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 6438 transitions. [2022-12-13 12:05:22,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 87.0) internal successors, (6438), 74 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:22,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 264.0) internal successors, (19800), 75 states have internal predecessors, (19800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:22,532 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 264.0) internal successors, (19800), 75 states have internal predecessors, (19800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:22,532 INFO L175 Difference]: Start difference. First operand has 442 places, 436 transitions, 7150 flow. Second operand 74 states and 6438 transitions. [2022-12-13 12:05:22,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 3761 transitions, 82383 flow [2022-12-13 12:05:24,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 3761 transitions, 76709 flow, removed 120 selfloop flow, removed 57 redundant places. [2022-12-13 12:05:24,280 INFO L231 Difference]: Finished difference. Result has 464 places, 449 transitions, 7062 flow [2022-12-13 12:05:24,280 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=6630, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=7062, PETRI_PLACES=464, PETRI_TRANSITIONS=449} [2022-12-13 12:05:24,280 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 425 predicate places. [2022-12-13 12:05:24,281 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 449 transitions, 7062 flow [2022-12-13 12:05:24,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 80.47169811320755) internal successors, (4265), 53 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:24,281 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:05:24,281 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:05:24,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-12-13 12:05:24,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-12-13 12:05:24,482 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:05:24,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:05:24,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1246608382, now seen corresponding path program 7 times [2022-12-13 12:05:24,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:05:24,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520113837] [2022-12-13 12:05:24,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:05:24,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:05:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:05:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:05:25,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:05:25,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520113837] [2022-12-13 12:05:25,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520113837] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:05:25,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413141017] [2022-12-13 12:05:25,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:05:25,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:05:25,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:05:25,098 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:05:25,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-13 12:05:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:05:25,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 12:05:25,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:05:25,494 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 12:05:25,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:05:25,532 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 25 treesize of output 24 [2022-12-13 12:05:25,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:05:25,573 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 16 treesize of output 18 [2022-12-13 12:05:25,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:05:25,610 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 16 treesize of output 18 [2022-12-13 12:05:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:05:25,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:05:26,014 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2501 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2501) c_~A~0.base) (+ c_~A~0.offset 24)) 9223372039002259456)) is different from false [2022-12-13 12:05:26,186 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 12:05:26,186 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 34 treesize of output 40 [2022-12-13 12:05:26,192 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:05:26,193 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 141 treesize of output 131 [2022-12-13 12:05:26,196 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 118 treesize of output 110 [2022-12-13 12:05:26,199 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 110 treesize of output 94 [2022-12-13 12:05:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:05:26,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413141017] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:05:26,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:05:26,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2022-12-13 12:05:26,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592611347] [2022-12-13 12:05:26,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:05:26,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-13 12:05:26,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:05:26,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-13 12:05:26,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2566, Unknown=18, NotChecked=102, Total=2862 [2022-12-13 12:05:26,630 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 12:05:26,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 449 transitions, 7062 flow. Second operand has 54 states, 54 states have (on average 89.44444444444444) internal successors, (4830), 54 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:26,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:05:26,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 12:05:26,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:05:37,913 INFO L130 PetriNetUnfolder]: 19656/34676 cut-off events. [2022-12-13 12:05:37,913 INFO L131 PetriNetUnfolder]: For 439479/439856 co-relation queries the response was YES. [2022-12-13 12:05:38,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280322 conditions, 34676 events. 19656/34676 cut-off events. For 439479/439856 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 283688 event pairs, 3055 based on Foata normal form. 1217/34134 useless extension candidates. Maximal degree in co-relation 280261. Up to 10158 conditions per place. [2022-12-13 12:05:38,319 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 2365 selfloop transitions, 90 changer transitions 0/2461 dead transitions. [2022-12-13 12:05:38,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 2461 transitions, 51659 flow [2022-12-13 12:05:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 12:05:38,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 12:05:38,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2475 transitions. [2022-12-13 12:05:38,321 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3605769230769231 [2022-12-13 12:05:38,321 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2475 transitions. [2022-12-13 12:05:38,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2475 transitions. [2022-12-13 12:05:38,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:05:38,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2475 transitions. [2022-12-13 12:05:38,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 95.1923076923077) internal successors, (2475), 26 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:38,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 264.0) internal successors, (7128), 27 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 12:05:38,326 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 264.0) internal successors, (7128), 27 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 12:05:38,326 INFO L175 Difference]: Start difference. First operand has 464 places, 449 transitions, 7062 flow. Second operand 26 states and 2475 transitions. [2022-12-13 12:05:38,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 2461 transitions, 51659 flow [2022-12-13 12:05:39,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 2461 transitions, 51064 flow, removed 6 selfloop flow, removed 41 redundant places. [2022-12-13 12:05:39,885 INFO L231 Difference]: Finished difference. Result has 435 places, 450 transitions, 7014 flow [2022-12-13 12:05:39,885 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=6736, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7014, PETRI_PLACES=435, PETRI_TRANSITIONS=450} [2022-12-13 12:05:39,886 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 396 predicate places. [2022-12-13 12:05:39,886 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 450 transitions, 7014 flow [2022-12-13 12:05:39,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 89.44444444444444) internal successors, (4830), 54 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:39,886 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:05:39,886 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 7, 7, 1, 1, 1, 1, 1] [2022-12-13 12:05:39,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-12-13 12:05:40,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:05:40,087 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:05:40,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:05:40,088 INFO L85 PathProgramCache]: Analyzing trace with hash 255209617, now seen corresponding path program 7 times [2022-12-13 12:05:40,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:05:40,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821410726] [2022-12-13 12:05:40,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:05:40,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:05:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:05:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:05:40,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:05:40,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821410726] [2022-12-13 12:05:40,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821410726] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:05:40,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630524077] [2022-12-13 12:05:40,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:05:40,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:05:40,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:05:40,633 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:05:40,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-13 12:05:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:05:40,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-13 12:05:40,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:05:41,042 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 12:05:41,075 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 23 treesize of output 22 [2022-12-13 12:05:41,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:05:41,116 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 16 treesize of output 18 [2022-12-13 12:05:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:05:41,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:05:41,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:05:41,777 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 32 treesize of output 38 [2022-12-13 12:05:41,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:05:41,782 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 37 treesize of output 33 [2022-12-13 12:05:41,784 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 7 treesize of output 3 [2022-12-13 12:05:42,056 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:05:42,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630524077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:05:42,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:05:42,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2022-12-13 12:05:42,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414729942] [2022-12-13 12:05:42,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:05:42,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 12:05:42,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:05:42,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 12:05:42,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2986, Unknown=21, NotChecked=0, Total=3192 [2022-12-13 12:05:42,443 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 264 [2022-12-13 12:05:42,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 450 transitions, 7014 flow. Second operand has 57 states, 57 states have (on average 92.42105263157895) internal successors, (5268), 57 states have internal predecessors, (5268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:42,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:05:42,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 264 [2022-12-13 12:05:42,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:05:52,193 INFO L130 PetriNetUnfolder]: 19417/34255 cut-off events. [2022-12-13 12:05:52,193 INFO L131 PetriNetUnfolder]: For 367739/368862 co-relation queries the response was YES. [2022-12-13 12:05:52,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276971 conditions, 34255 events. 19417/34255 cut-off events. For 367739/368862 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 277933 event pairs, 9027 based on Foata normal form. 1125/35314 useless extension candidates. Maximal degree in co-relation 276911. Up to 19325 conditions per place. [2022-12-13 12:05:52,489 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 355 selfloop transitions, 290 changer transitions 0/648 dead transitions. [2022-12-13 12:05:52,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 648 transitions, 11174 flow [2022-12-13 12:05:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-13 12:05:52,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-12-13 12:05:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6401 transitions. [2022-12-13 12:05:52,494 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3565619429590018 [2022-12-13 12:05:52,494 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6401 transitions. [2022-12-13 12:05:52,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6401 transitions. [2022-12-13 12:05:52,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:05:52,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6401 transitions. [2022-12-13 12:05:52,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 94.13235294117646) internal successors, (6401), 68 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:52,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 264.0) internal successors, (18216), 69 states have internal predecessors, (18216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:52,505 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 264.0) internal successors, (18216), 69 states have internal predecessors, (18216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:52,505 INFO L175 Difference]: Start difference. First operand has 435 places, 450 transitions, 7014 flow. Second operand 68 states and 6401 transitions. [2022-12-13 12:05:52,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 648 transitions, 11174 flow [2022-12-13 12:05:54,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 648 transitions, 10895 flow, removed 0 selfloop flow, removed 21 redundant places. [2022-12-13 12:05:54,079 INFO L231 Difference]: Finished difference. Result has 487 places, 514 transitions, 8327 flow [2022-12-13 12:05:54,080 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=6861, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=8327, PETRI_PLACES=487, PETRI_TRANSITIONS=514} [2022-12-13 12:05:54,080 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 448 predicate places. [2022-12-13 12:05:54,080 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 514 transitions, 8327 flow [2022-12-13 12:05:54,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 92.42105263157895) internal successors, (5268), 57 states have internal predecessors, (5268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:54,080 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:05:54,081 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 7, 7, 1, 1, 1, 1, 1] [2022-12-13 12:05:54,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-12-13 12:05:54,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-12-13 12:05:54,281 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:05:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:05:54,282 INFO L85 PathProgramCache]: Analyzing trace with hash 255209616, now seen corresponding path program 10 times [2022-12-13 12:05:54,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:05:54,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963827110] [2022-12-13 12:05:54,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:05:54,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:05:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:05:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:05:54,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:05:54,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963827110] [2022-12-13 12:05:54,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963827110] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:05:54,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888541492] [2022-12-13 12:05:54,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:05:54,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:05:54,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:05:54,861 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:05:54,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-13 12:05:55,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:05:55,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:05:55,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 12:05:55,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:05:55,260 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 12:05:55,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:05:55,295 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 27 treesize of output 26 [2022-12-13 12:05:55,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:05:55,333 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 12:05:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:05:55,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:05:56,046 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-12-13 12:05:56,046 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 33 treesize of output 39 [2022-12-13 12:05:56,050 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:05:56,051 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 43 treesize of output 39 [2022-12-13 12:05:56,059 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 9 treesize of output 5 [2022-12-13 12:05:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:05:56,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888541492] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:05:56,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:05:56,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2022-12-13 12:05:56,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627522604] [2022-12-13 12:05:56,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:05:56,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 12:05:56,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:05:56,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 12:05:56,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2993, Unknown=14, NotChecked=0, Total=3192 [2022-12-13 12:05:58,049 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 264 [2022-12-13 12:05:58,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 514 transitions, 8327 flow. Second operand has 57 states, 57 states have (on average 92.42105263157895) internal successors, (5268), 57 states have internal predecessors, (5268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:58,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:05:58,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 264 [2022-12-13 12:05:58,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:06:06,513 INFO L130 PetriNetUnfolder]: 19388/34171 cut-off events. [2022-12-13 12:06:06,513 INFO L131 PetriNetUnfolder]: For 368381/369475 co-relation queries the response was YES. [2022-12-13 12:06:06,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276054 conditions, 34171 events. 19388/34171 cut-off events. For 368381/369475 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 276214 event pairs, 9011 based on Foata normal form. 1096/33461 useless extension candidates. Maximal degree in co-relation 275988. Up to 19241 conditions per place. [2022-12-13 12:06:06,907 INFO L137 encePairwiseOnDemand]: 255/264 looper letters, 341 selfloop transitions, 285 changer transitions 0/629 dead transitions. [2022-12-13 12:06:06,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 629 transitions, 11159 flow [2022-12-13 12:06:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 12:06:06,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 12:06:06,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2930 transitions. [2022-12-13 12:06:06,909 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3580156402737048 [2022-12-13 12:06:06,909 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2930 transitions. [2022-12-13 12:06:06,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2930 transitions. [2022-12-13 12:06:06,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:06:06,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2930 transitions. [2022-12-13 12:06:06,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 94.51612903225806) internal successors, (2930), 31 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:06,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 264.0) internal successors, (8448), 32 states have internal predecessors, (8448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:06,915 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 264.0) internal successors, (8448), 32 states have internal predecessors, (8448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:06,915 INFO L175 Difference]: Start difference. First operand has 487 places, 514 transitions, 8327 flow. Second operand 31 states and 2930 transitions. [2022-12-13 12:06:06,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 629 transitions, 11159 flow [2022-12-13 12:06:08,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 629 transitions, 10888 flow, removed 23 selfloop flow, removed 31 redundant places. [2022-12-13 12:06:08,747 INFO L231 Difference]: Finished difference. Result has 486 places, 511 transitions, 8572 flow [2022-12-13 12:06:08,748 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=8002, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=8572, PETRI_PLACES=486, PETRI_TRANSITIONS=511} [2022-12-13 12:06:08,748 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 447 predicate places. [2022-12-13 12:06:08,748 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 511 transitions, 8572 flow [2022-12-13 12:06:08,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 92.42105263157895) internal successors, (5268), 57 states have internal predecessors, (5268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:08,748 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:06:08,749 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 8, 7, 1, 1, 1, 1, 1] [2022-12-13 12:06:08,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-12-13 12:06:08,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-12-13 12:06:08,950 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:06:08,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:06:08,950 INFO L85 PathProgramCache]: Analyzing trace with hash 77510799, now seen corresponding path program 1 times [2022-12-13 12:06:08,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:06:08,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730042622] [2022-12-13 12:06:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:06:08,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:06:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:06:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:06:09,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:06:09,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730042622] [2022-12-13 12:06:09,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730042622] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:06:09,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063538217] [2022-12-13 12:06:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:06:09,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:06:09,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:06:09,247 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:06:09,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-13 12:06:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:06:09,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 12:06:09,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:06:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 71 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:06:09,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:06:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 71 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:06:09,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063538217] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:06:09,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:06:09,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 43 [2022-12-13 12:06:09,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810297255] [2022-12-13 12:06:09,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:06:09,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 12:06:09,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:06:09,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 12:06:09,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 12:06:10,303 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 264 [2022-12-13 12:06:10,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 511 transitions, 8572 flow. Second operand has 44 states, 44 states have (on average 106.5) internal successors, (4686), 44 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:10,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:06:10,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 264 [2022-12-13 12:06:10,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:06:17,064 INFO L130 PetriNetUnfolder]: 17751/31559 cut-off events. [2022-12-13 12:06:17,064 INFO L131 PetriNetUnfolder]: For 406488/407659 co-relation queries the response was YES. [2022-12-13 12:06:17,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257088 conditions, 31559 events. 17751/31559 cut-off events. For 406488/407659 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 256253 event pairs, 7175 based on Foata normal form. 1403/31304 useless extension candidates. Maximal degree in co-relation 257024. Up to 13537 conditions per place. [2022-12-13 12:06:17,343 INFO L137 encePairwiseOnDemand]: 257/264 looper letters, 383 selfloop transitions, 40 changer transitions 381/806 dead transitions. [2022-12-13 12:06:17,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 806 transitions, 13732 flow [2022-12-13 12:06:17,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 12:06:17,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 12:06:17,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2211 transitions. [2022-12-13 12:06:17,345 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41875 [2022-12-13 12:06:17,345 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2211 transitions. [2022-12-13 12:06:17,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2211 transitions. [2022-12-13 12:06:17,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:06:17,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2211 transitions. [2022-12-13 12:06:17,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 110.55) internal successors, (2211), 20 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:17,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 264.0) internal successors, (5544), 21 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:17,349 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 264.0) internal successors, (5544), 21 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:17,349 INFO L175 Difference]: Start difference. First operand has 486 places, 511 transitions, 8572 flow. Second operand 20 states and 2211 transitions. [2022-12-13 12:06:17,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 806 transitions, 13732 flow [2022-12-13 12:06:18,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 806 transitions, 13413 flow, removed 4 selfloop flow, removed 30 redundant places. [2022-12-13 12:06:18,462 INFO L231 Difference]: Finished difference. Result has 475 places, 369 transitions, 5846 flow [2022-12-13 12:06:18,462 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=7764, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5846, PETRI_PLACES=475, PETRI_TRANSITIONS=369} [2022-12-13 12:06:18,463 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 436 predicate places. [2022-12-13 12:06:18,463 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 369 transitions, 5846 flow [2022-12-13 12:06:18,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 106.5) internal successors, (4686), 44 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:18,463 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:06:18,463 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:06:18,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-12-13 12:06:18,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:06:18,664 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:06:18,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:06:18,665 INFO L85 PathProgramCache]: Analyzing trace with hash 305248040, now seen corresponding path program 8 times [2022-12-13 12:06:18,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:06:18,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762867668] [2022-12-13 12:06:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:06:18,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:06:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:06:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:06:19,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:06:19,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762867668] [2022-12-13 12:06:19,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762867668] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:06:19,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767655870] [2022-12-13 12:06:19,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:06:19,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:06:19,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:06:19,260 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:06:19,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-13 12:06:19,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:06:19,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:06:19,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 12:06:19,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:06:19,757 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 12:06:19,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:06:19,819 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 12:06:19,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:06:19,865 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 12:06:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:06:20,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:06:21,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:06:21,344 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 12:06:21,351 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:06:21,352 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 12:06:21,356 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 65 treesize of output 53 [2022-12-13 12:06:21,360 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 118 treesize of output 94 [2022-12-13 12:06:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:06:22,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767655870] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:06:22,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:06:22,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2022-12-13 12:06:22,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396881067] [2022-12-13 12:06:22,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:06:22,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-13 12:06:22,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:06:22,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-13 12:06:22,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=3088, Unknown=3, NotChecked=0, Total=3422 [2022-12-13 12:06:23,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:06:24,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:06:27,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:06:32,412 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 264 [2022-12-13 12:06:32,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 369 transitions, 5846 flow. Second operand has 59 states, 59 states have (on average 80.47457627118644) internal successors, (4748), 59 states have internal predecessors, (4748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:06:32,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:06:32,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 264 [2022-12-13 12:06:32,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:06:33,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:07:23,256 INFO L130 PetriNetUnfolder]: 23711/42150 cut-off events. [2022-12-13 12:07:23,256 INFO L131 PetriNetUnfolder]: For 601000/601310 co-relation queries the response was YES. [2022-12-13 12:07:23,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347908 conditions, 42150 events. 23711/42150 cut-off events. For 601000/601310 co-relation queries the response was YES. Maximal size of possible extension queue 954. Compared 355394 event pairs, 1316 based on Foata normal form. 1568/41804 useless extension candidates. Maximal degree in co-relation 347845. Up to 11232 conditions per place. [2022-12-13 12:07:23,872 INFO L137 encePairwiseOnDemand]: 254/264 looper letters, 3141 selfloop transitions, 121 changer transitions 386/3653 dead transitions. [2022-12-13 12:07:23,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 3653 transitions, 82852 flow [2022-12-13 12:07:23,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-12-13 12:07:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-12-13 12:07:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 7351 transitions. [2022-12-13 12:07:23,877 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33148448773448774 [2022-12-13 12:07:23,877 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 7351 transitions. [2022-12-13 12:07:23,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 7351 transitions. [2022-12-13 12:07:23,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:07:23,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 7351 transitions. [2022-12-13 12:07:23,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 87.51190476190476) internal successors, (7351), 84 states have internal predecessors, (7351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:23,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 264.0) internal successors, (22440), 85 states have internal predecessors, (22440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:23,892 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 264.0) internal successors, (22440), 85 states have internal predecessors, (22440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:23,892 INFO L175 Difference]: Start difference. First operand has 475 places, 369 transitions, 5846 flow. Second operand 84 states and 7351 transitions. [2022-12-13 12:07:23,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 3653 transitions, 82852 flow [2022-12-13 12:07:25,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 3653 transitions, 71429 flow, removed 35 selfloop flow, removed 24 redundant places. [2022-12-13 12:07:25,552 INFO L231 Difference]: Finished difference. Result has 464 places, 388 transitions, 5671 flow [2022-12-13 12:07:25,552 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=5080, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=5671, PETRI_PLACES=464, PETRI_TRANSITIONS=388} [2022-12-13 12:07:25,553 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 425 predicate places. [2022-12-13 12:07:25,553 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 388 transitions, 5671 flow [2022-12-13 12:07:25,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 80.47457627118644) internal successors, (4748), 59 states have internal predecessors, (4748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:25,553 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:07:25,553 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 7, 7, 1, 1, 1, 1, 1, 1] [2022-12-13 12:07:25,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-12-13 12:07:25,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-12-13 12:07:25,754 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-12-13 12:07:25,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:07:25,755 INFO L85 PathProgramCache]: Analyzing trace with hash -242370688, now seen corresponding path program 7 times [2022-12-13 12:07:25,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:07:25,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671006508] [2022-12-13 12:07:25,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:07:25,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:07:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:07:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:07:26,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:07:26,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671006508] [2022-12-13 12:07:26,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671006508] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:07:26,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084087207] [2022-12-13 12:07:26,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:07:26,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:07:26,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:07:26,446 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:07:26,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef065ead-bfe8-453d-9efe-f15e6d6d5c28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-13 12:07:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:07:26,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 12:07:26,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:07:26,889 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 12:07:26,939 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 25 treesize of output 24 [2022-12-13 12:07:26,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:07:26,989 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 12:07:27,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:07:27,112 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 12:07:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:07:27,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:07:27,601 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2807 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2807) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 24)) 9223372039002259456))) is different from false [2022-12-13 12:07:27,605 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2807 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2807) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 28)) 9223372039002259456))) is different from false [2022-12-13 12:07:27,874 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:07:27,875 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 37 treesize of output 43 [2022-12-13 12:07:27,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:07:27,881 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 159 treesize of output 149 [2022-12-13 12:07:27,885 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 134 treesize of output 118 [2022-12-13 12:07:27,889 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 63 treesize of output 55 [2022-12-13 12:07:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2022-12-13 12:07:28,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084087207] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:07:28,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:07:28,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 60 [2022-12-13 12:07:28,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966220025] [2022-12-13 12:07:28,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:07:28,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-13 12:07:28,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:07:28,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-13 12:07:28,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=3331, Unknown=21, NotChecked=234, Total=3782 [2022-12-13 12:07:28,420 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 264 [2022-12-13 12:07:28,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 388 transitions, 5671 flow. Second operand has 62 states, 62 states have (on average 89.40322580645162) internal successors, (5543), 62 states have internal predecessors, (5543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:07:28,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:07:28,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 264 [2022-12-13 12:07:28,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand