./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.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_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/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_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/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_a3b69470-3db9-4f5d-9df8-0b3afbaac486/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 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- 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 21:43:52,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:43:52,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:43:52,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:43:52,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:43:52,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:43:52,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:43:52,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:43:52,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:43:52,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:43:52,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:43:52,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:43:52,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:43:52,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:43:52,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:43:52,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:43:52,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:43:52,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:43:52,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:43:52,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:43:52,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:43:52,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:43:52,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:43:52,051 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:43:52,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:43:52,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:43:52,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:43:52,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:43:52,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:43:52,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:43:52,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:43:52,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:43:52,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:43:52,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:43:52,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:43:52,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:43:52,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:43:52,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:43:52,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:43:52,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:43:52,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:43:52,063 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 21:43:52,084 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:43:52,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:43:52,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:43:52,084 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:43:52,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:43:52,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:43:52,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:43:52,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:43:52,086 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:43:52,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:43:52,086 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:43:52,086 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 21:43:52,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:43:52,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:43:52,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:43:52,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 21:43:52,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:43:52,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 21:43:52,087 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 21:43:52,087 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:43:52,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 21:43:52,087 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:43:52,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 21:43:52,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:43:52,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:43:52,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:43:52,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:43:52,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:43:52,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:43:52,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 21:43:52,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:43:52,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:43:52,089 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:43:52,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 21:43:52,089 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:43:52,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:43:52,089 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:43:52,089 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_a3b69470-3db9-4f5d-9df8-0b3afbaac486/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2022-12-13 21:43:52,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:43:52,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:43:52,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:43:52,300 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:43:52,300 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:43:52,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-12-13 21:43:54,837 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:43:55,000 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:43:55,001 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-12-13 21:43:55,005 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/data/031133c0d/e1a99f95db704a39851442ee477464b2/FLAGaa4897668 [2022-12-13 21:43:55,394 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/data/031133c0d/e1a99f95db704a39851442ee477464b2 [2022-12-13 21:43:55,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:43:55,397 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:43:55,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:43:55,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:43:55,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:43:55,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:43:55" (1/1) ... [2022-12-13 21:43:55,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5983b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:43:55, skipping insertion in model container [2022-12-13 21:43:55,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:43:55" (1/1) ... [2022-12-13 21:43:55,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:43:55,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:43:55,526 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:43:55,527 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:43:55,527 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:43:55,528 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:43:55,530 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:43:55,531 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:43:55,531 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:43:55,532 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:43:55,533 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:43:55,533 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:43:55,534 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:43:55,534 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:43:55,539 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_a3b69470-3db9-4f5d-9df8-0b3afbaac486/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-12-13 21:43:55,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:43:55,551 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:43:55,561 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:43:55,562 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:43:55,562 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:43:55,562 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:43:55,563 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:43:55,563 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:43:55,564 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:43:55,564 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:43:55,565 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:43:55,565 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:43:55,565 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:43:55,565 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:43:55,569 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_a3b69470-3db9-4f5d-9df8-0b3afbaac486/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-12-13 21:43:55,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:43:55,582 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:43:55,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:43:55 WrapperNode [2022-12-13 21:43:55,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:43:55,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:43:55,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:43:55,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:43:55,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:43:55" (1/1) ... [2022-12-13 21:43:55,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:43:55" (1/1) ... [2022-12-13 21:43:55,613 INFO L138 Inliner]: procedures = 25, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 250 [2022-12-13 21:43:55,613 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:43:55,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:43:55,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:43:55,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:43:55,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:43:55" (1/1) ... [2022-12-13 21:43:55,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:43:55" (1/1) ... [2022-12-13 21:43:55,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:43:55" (1/1) ... [2022-12-13 21:43:55,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:43:55" (1/1) ... [2022-12-13 21:43:55,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:43:55" (1/1) ... [2022-12-13 21:43:55,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:43:55" (1/1) ... [2022-12-13 21:43:55,639 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:43:55" (1/1) ... [2022-12-13 21:43:55,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:43:55" (1/1) ... [2022-12-13 21:43:55,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:43:55,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:43:55,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:43:55,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:43:55,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:43:55" (1/1) ... [2022-12-13 21:43:55,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:43:55,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:43:55,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:43:55,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:43:55,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:43:55,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 21:43:55,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 21:43:55,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 21:43:55,703 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 21:43:55,703 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 21:43:55,703 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 21:43:55,703 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 21:43:55,703 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 21:43:55,703 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 21:43:55,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:43:55,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 21:43:55,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 21:43:55,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 21:43:55,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:43:55,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:43:55,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 21:43:55,706 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 21:43:55,795 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:43:55,796 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:43:56,134 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:43:56,426 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:43:56,427 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 21:43:56,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:43:56 BoogieIcfgContainer [2022-12-13 21:43:56,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:43:56,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:43:56,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:43:56,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:43:56,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:43:55" (1/3) ... [2022-12-13 21:43:56,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bcbd763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:43:56, skipping insertion in model container [2022-12-13 21:43:56,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:43:55" (2/3) ... [2022-12-13 21:43:56,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bcbd763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:43:56, skipping insertion in model container [2022-12-13 21:43:56,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:43:56" (3/3) ... [2022-12-13 21:43:56,439 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2022-12-13 21:43:56,447 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 21:43:56,458 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:43:56,458 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-12-13 21:43:56,458 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 21:43:56,617 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 21:43:56,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 189 transitions, 402 flow [2022-12-13 21:43:56,728 INFO L130 PetriNetUnfolder]: 12/186 cut-off events. [2022-12-13 21:43:56,728 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 21:43:56,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 186 events. 12/186 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 259 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 138. Up to 2 conditions per place. [2022-12-13 21:43:56,734 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 189 transitions, 402 flow [2022-12-13 21:43:56,740 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 165 transitions, 345 flow [2022-12-13 21:43:56,743 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:43:56,754 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 165 transitions, 345 flow [2022-12-13 21:43:56,756 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 165 transitions, 345 flow [2022-12-13 21:43:56,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 165 transitions, 345 flow [2022-12-13 21:43:56,794 INFO L130 PetriNetUnfolder]: 11/165 cut-off events. [2022-12-13 21:43:56,794 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 21:43:56,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 165 events. 11/165 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 258 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 138. Up to 2 conditions per place. [2022-12-13 21:43:56,798 INFO L119 LiptonReduction]: Number of co-enabled transitions 4158 [2022-12-13 21:44:07,068 INFO L134 LiptonReduction]: Checked pairs total: 7013 [2022-12-13 21:44:07,068 INFO L136 LiptonReduction]: Total number of compositions: 171 [2022-12-13 21:44:07,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:44:07,081 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;@5b1d49be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:44:07,082 INFO L358 AbstractCegarLoop]: Starting to check reachability of 53 error locations. [2022-12-13 21:44:07,083 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 21:44:07,083 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:44:07,083 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:44:07,084 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 21:44:07,084 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:44:07,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:44:07,087 INFO L85 PathProgramCache]: Analyzing trace with hash 34599, now seen corresponding path program 1 times [2022-12-13 21:44:07,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:44:07,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920897610] [2022-12-13 21:44:07,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:44:07,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:44:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:44:07,279 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 21:44:07,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:44:07,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920897610] [2022-12-13 21:44:07,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920897610] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:44:07,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:44:07,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:44:07,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575131071] [2022-12-13 21:44:07,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:44:07,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:44:07,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:44:07,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:44:07,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:44:07,318 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 360 [2022-12-13 21:44:07,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:07,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:44:07,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 360 [2022-12-13 21:44:07,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:44:09,716 INFO L130 PetriNetUnfolder]: 16609/21051 cut-off events. [2022-12-13 21:44:09,716 INFO L131 PetriNetUnfolder]: For 396/396 co-relation queries the response was YES. [2022-12-13 21:44:09,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42581 conditions, 21051 events. 16609/21051 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 1923. Compared 111063 event pairs, 8878 based on Foata normal form. 0/5745 useless extension candidates. Maximal degree in co-relation 19467. Up to 10455 conditions per place. [2022-12-13 21:44:09,807 INFO L137 encePairwiseOnDemand]: 350/360 looper letters, 77 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2022-12-13 21:44:09,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 82 transitions, 352 flow [2022-12-13 21:44:09,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:44:09,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:44:09,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2022-12-13 21:44:09,821 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5027777777777778 [2022-12-13 21:44:09,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2022-12-13 21:44:09,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2022-12-13 21:44:09,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:44:09,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2022-12-13 21:44:09,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:09,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:09,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:09,839 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 115 flow. Second operand 3 states and 543 transitions. [2022-12-13 21:44:09,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 82 transitions, 352 flow [2022-12-13 21:44:09,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 82 transitions, 334 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 21:44:09,854 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 108 flow [2022-12-13 21:44:09,855 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2022-12-13 21:44:09,859 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, -8 predicate places. [2022-12-13 21:44:09,859 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 108 flow [2022-12-13 21:44:09,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:09,859 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:44:09,860 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 21:44:09,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 21:44:09,860 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:44:09,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:44:09,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1073781, now seen corresponding path program 1 times [2022-12-13 21:44:09,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:44:09,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112103178] [2022-12-13 21:44:09,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:44:09,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:44:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:44:09,944 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 21:44:09,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:44:09,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112103178] [2022-12-13 21:44:09,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112103178] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:44:09,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286751360] [2022-12-13 21:44:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:44:09,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:44:09,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:44:09,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:44:09,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 21:44:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:44:10,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 21:44:10,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:44:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:44:10,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:44:10,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286751360] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:44:10,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:44:10,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2022-12-13 21:44:10,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751591615] [2022-12-13 21:44:10,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:44:10,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:44:10,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:44:10,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:44:10,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:44:10,083 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 360 [2022-12-13 21:44:10,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 150.75) internal successors, (603), 4 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:10,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:44:10,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 360 [2022-12-13 21:44:10,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:44:12,305 INFO L130 PetriNetUnfolder]: 16609/21050 cut-off events. [2022-12-13 21:44:12,306 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-12-13 21:44:12,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42343 conditions, 21050 events. 16609/21050 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 1923. Compared 111151 event pairs, 8878 based on Foata normal form. 0/5747 useless extension candidates. Maximal degree in co-relation 21169. Up to 10453 conditions per place. [2022-12-13 21:44:12,369 INFO L137 encePairwiseOnDemand]: 357/360 looper letters, 76 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2022-12-13 21:44:12,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 81 transitions, 340 flow [2022-12-13 21:44:12,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:44:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:44:12,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 679 transitions. [2022-12-13 21:44:12,372 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47152777777777777 [2022-12-13 21:44:12,372 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 679 transitions. [2022-12-13 21:44:12,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 679 transitions. [2022-12-13 21:44:12,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:44:12,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 679 transitions. [2022-12-13 21:44:12,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:12,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 360.0) internal successors, (1800), 5 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:12,378 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 360.0) internal successors, (1800), 5 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:12,379 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 108 flow. Second operand 4 states and 679 transitions. [2022-12-13 21:44:12,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 81 transitions, 340 flow [2022-12-13 21:44:12,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 81 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:44:12,380 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 106 flow [2022-12-13 21:44:12,381 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2022-12-13 21:44:12,381 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, -7 predicate places. [2022-12-13 21:44:12,381 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 106 flow [2022-12-13 21:44:12,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.75) internal successors, (603), 4 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:12,382 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:44:12,382 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 21:44:12,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 21:44:12,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:44:12,583 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:44:12,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:44:12,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1073782, now seen corresponding path program 1 times [2022-12-13 21:44:12,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:44:12,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158070370] [2022-12-13 21:44:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:44:12,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:44:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:44:12,640 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 21:44:12,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:44:12,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158070370] [2022-12-13 21:44:12,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158070370] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:44:12,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251090060] [2022-12-13 21:44:12,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:44:12,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:44:12,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:44:12,641 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:44:12,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 21:44:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:44:12,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 21:44:12,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:44:12,733 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 21:44:12,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:44:12,747 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 21:44:12,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251090060] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:44:12,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:44:12,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 21:44:12,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124985239] [2022-12-13 21:44:12,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:44:12,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:44:12,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:44:12,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:44:12,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 21:44:12,771 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 360 [2022-12-13 21:44:12,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 106 flow. Second operand has 7 states, 7 states have (on average 151.14285714285714) internal successors, (1058), 7 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:12,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:44:12,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 360 [2022-12-13 21:44:12,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:44:18,496 INFO L130 PetriNetUnfolder]: 41521/52622 cut-off events. [2022-12-13 21:44:18,496 INFO L131 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-12-13 21:44:18,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105842 conditions, 52622 events. 41521/52622 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 4056. Compared 303382 event pairs, 22195 based on Foata normal form. 0/14501 useless extension candidates. Maximal degree in co-relation 84667. Up to 10454 conditions per place. [2022-12-13 21:44:18,673 INFO L137 encePairwiseOnDemand]: 357/360 looper letters, 187 selfloop transitions, 5 changer transitions 0/195 dead transitions. [2022-12-13 21:44:18,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 195 transitions, 822 flow [2022-12-13 21:44:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:44:18,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 21:44:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1095 transitions. [2022-12-13 21:44:18,676 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2022-12-13 21:44:18,676 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1095 transitions. [2022-12-13 21:44:18,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1095 transitions. [2022-12-13 21:44:18,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:44:18,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1095 transitions. [2022-12-13 21:44:18,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.5) internal successors, (1095), 6 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:18,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:18,681 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:18,681 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 106 flow. Second operand 6 states and 1095 transitions. [2022-12-13 21:44:18,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 195 transitions, 822 flow [2022-12-13 21:44:18,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 195 transitions, 819 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:44:18,684 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 139 flow [2022-12-13 21:44:18,684 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=139, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2022-12-13 21:44:18,684 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2022-12-13 21:44:18,684 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 139 flow [2022-12-13 21:44:18,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 151.14285714285714) internal successors, (1058), 7 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:18,685 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:44:18,685 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 21:44:18,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 21:44:18,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:44:18,886 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:44:18,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:44:18,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1032085357, now seen corresponding path program 1 times [2022-12-13 21:44:18,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:44:18,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007893435] [2022-12-13 21:44:18,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:44:18,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:44:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:44:18,944 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 21:44:18,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:44:18,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007893435] [2022-12-13 21:44:18,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007893435] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:44:18,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:44:18,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:44:18,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495061085] [2022-12-13 21:44:18,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:44:18,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:44:18,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:44:18,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:44:18,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:44:18,952 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 360 [2022-12-13 21:44:18,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:18,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:44:18,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 360 [2022-12-13 21:44:18,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:44:25,774 INFO L130 PetriNetUnfolder]: 59991/78852 cut-off events. [2022-12-13 21:44:25,774 INFO L131 PetriNetUnfolder]: For 151/151 co-relation queries the response was YES. [2022-12-13 21:44:25,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158986 conditions, 78852 events. 59991/78852 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 6377. Compared 530832 event pairs, 22435 based on Foata normal form. 0/24427 useless extension candidates. Maximal degree in co-relation 127181. Up to 45098 conditions per place. [2022-12-13 21:44:26,085 INFO L137 encePairwiseOnDemand]: 356/360 looper letters, 76 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2022-12-13 21:44:26,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 366 flow [2022-12-13 21:44:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:44:26,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:44:26,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2022-12-13 21:44:26,087 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4898148148148148 [2022-12-13 21:44:26,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2022-12-13 21:44:26,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2022-12-13 21:44:26,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:44:26,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2022-12-13 21:44:26,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:26,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:26,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:26,091 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 139 flow. Second operand 3 states and 529 transitions. [2022-12-13 21:44:26,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 366 flow [2022-12-13 21:44:26,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 358 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 21:44:26,093 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 145 flow [2022-12-13 21:44:26,093 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2022-12-13 21:44:26,094 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 1 predicate places. [2022-12-13 21:44:26,094 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 145 flow [2022-12-13 21:44:26,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:26,094 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:44:26,094 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 21:44:26,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 21:44:26,095 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:44:26,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:44:26,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1032085283, now seen corresponding path program 1 times [2022-12-13 21:44:26,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:44:26,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61119110] [2022-12-13 21:44:26,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:44:26,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:44:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:44:26,142 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 21:44:26,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:44:26,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61119110] [2022-12-13 21:44:26,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61119110] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:44:26,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:44:26,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:44:26,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830253449] [2022-12-13 21:44:26,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:44:26,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:44:26,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:44:26,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:44:26,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:44:26,147 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 360 [2022-12-13 21:44:26,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:26,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:44:26,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 360 [2022-12-13 21:44:26,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:44:31,604 INFO L130 PetriNetUnfolder]: 50126/65662 cut-off events. [2022-12-13 21:44:31,604 INFO L131 PetriNetUnfolder]: For 1263/2328 co-relation queries the response was YES. [2022-12-13 21:44:31,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137924 conditions, 65662 events. 50126/65662 cut-off events. For 1263/2328 co-relation queries the response was YES. Maximal size of possible extension queue 5362. Compared 435295 event pairs, 10605 based on Foata normal form. 1065/23387 useless extension candidates. Maximal degree in co-relation 110330. Up to 44281 conditions per place. [2022-12-13 21:44:31,872 INFO L137 encePairwiseOnDemand]: 356/360 looper letters, 73 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2022-12-13 21:44:31,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 360 flow [2022-12-13 21:44:31,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:44:31,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:44:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2022-12-13 21:44:31,874 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48703703703703705 [2022-12-13 21:44:31,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2022-12-13 21:44:31,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2022-12-13 21:44:31,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:44:31,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2022-12-13 21:44:31,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:31,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:31,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:31,878 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 145 flow. Second operand 3 states and 526 transitions. [2022-12-13 21:44:31,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 360 flow [2022-12-13 21:44:31,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:44:31,880 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 153 flow [2022-12-13 21:44:31,880 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2022-12-13 21:44:31,881 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2022-12-13 21:44:31,881 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 153 flow [2022-12-13 21:44:31,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:31,881 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:44:31,881 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 21:44:31,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 21:44:31,882 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:44:31,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:44:31,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1032085280, now seen corresponding path program 1 times [2022-12-13 21:44:31,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:44:31,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184481920] [2022-12-13 21:44:31,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:44:31,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:44:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:44:31,946 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 21:44:31,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:44:31,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184481920] [2022-12-13 21:44:31,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184481920] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:44:31,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:44:31,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:44:31,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346091286] [2022-12-13 21:44:31,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:44:31,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:44:31,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:44:31,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:44:31,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:44:32,004 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 360 [2022-12-13 21:44:32,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:32,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:44:32,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 360 [2022-12-13 21:44:32,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:44:37,120 INFO L130 PetriNetUnfolder]: 43465/57666 cut-off events. [2022-12-13 21:44:37,120 INFO L131 PetriNetUnfolder]: For 6307/6307 co-relation queries the response was YES. [2022-12-13 21:44:37,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124029 conditions, 57666 events. 43465/57666 cut-off events. For 6307/6307 co-relation queries the response was YES. Maximal size of possible extension queue 4925. Compared 376310 event pairs, 28068 based on Foata normal form. 222/22041 useless extension candidates. Maximal degree in co-relation 116766. Up to 53779 conditions per place. [2022-12-13 21:44:37,378 INFO L137 encePairwiseOnDemand]: 353/360 looper letters, 96 selfloop transitions, 4 changer transitions 0/102 dead transitions. [2022-12-13 21:44:37,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 472 flow [2022-12-13 21:44:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:44:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:44:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 819 transitions. [2022-12-13 21:44:37,381 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.455 [2022-12-13 21:44:37,381 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 819 transitions. [2022-12-13 21:44:37,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 819 transitions. [2022-12-13 21:44:37,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:44:37,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 819 transitions. [2022-12-13 21:44:37,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.8) internal successors, (819), 5 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:37,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 360.0) internal successors, (2160), 6 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:37,385 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 360.0) internal successors, (2160), 6 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:37,385 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 153 flow. Second operand 5 states and 819 transitions. [2022-12-13 21:44:37,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 472 flow [2022-12-13 21:44:37,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 102 transitions, 468 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:44:37,392 INFO L231 Difference]: Finished difference. Result has 64 places, 50 transitions, 179 flow [2022-12-13 21:44:37,392 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=64, PETRI_TRANSITIONS=50} [2022-12-13 21:44:37,393 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2022-12-13 21:44:37,393 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 50 transitions, 179 flow [2022-12-13 21:44:37,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:37,393 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:44:37,394 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 21:44:37,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 21:44:37,394 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:44:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:44:37,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1925442216, now seen corresponding path program 2 times [2022-12-13 21:44:37,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:44:37,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816915062] [2022-12-13 21:44:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:44:37,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:44:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:44:37,470 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 21:44:37,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:44:37,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816915062] [2022-12-13 21:44:37,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816915062] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:44:37,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679346829] [2022-12-13 21:44:37,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:44:37,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:44:37,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:44:37,471 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:44:37,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 21:44:37,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 21:44:37,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:44:37,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 21:44:37,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:44:37,564 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 21:44:37,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:44:37,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679346829] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:44:37,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:44:37,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-12-13 21:44:37,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127009344] [2022-12-13 21:44:37,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:44:37,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:44:37,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:44:37,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:44:37,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:44:37,574 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 360 [2022-12-13 21:44:37,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 50 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:37,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:44:37,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 360 [2022-12-13 21:44:37,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:44:42,162 INFO L130 PetriNetUnfolder]: 40772/53867 cut-off events. [2022-12-13 21:44:42,162 INFO L131 PetriNetUnfolder]: For 6244/7731 co-relation queries the response was YES. [2022-12-13 21:44:42,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118837 conditions, 53867 events. 40772/53867 cut-off events. For 6244/7731 co-relation queries the response was YES. Maximal size of possible extension queue 4766. Compared 350153 event pairs, 26367 based on Foata normal form. 1488/22433 useless extension candidates. Maximal degree in co-relation 113868. Up to 53598 conditions per place. [2022-12-13 21:44:42,428 INFO L137 encePairwiseOnDemand]: 358/360 looper letters, 44 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2022-12-13 21:44:42,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 49 transitions, 259 flow [2022-12-13 21:44:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:44:42,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:44:42,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2022-12-13 21:44:42,430 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4564814814814815 [2022-12-13 21:44:42,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2022-12-13 21:44:42,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2022-12-13 21:44:42,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:44:42,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2022-12-13 21:44:42,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:42,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:42,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:42,432 INFO L175 Difference]: Start difference. First operand has 64 places, 50 transitions, 179 flow. Second operand 3 states and 493 transitions. [2022-12-13 21:44:42,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 49 transitions, 259 flow [2022-12-13 21:44:42,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 49 transitions, 243 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-12-13 21:44:42,437 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 155 flow [2022-12-13 21:44:42,437 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2022-12-13 21:44:42,437 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2022-12-13 21:44:42,437 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 155 flow [2022-12-13 21:44:42,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:42,438 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:44:42,438 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 21:44:42,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 21:44:42,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:44:42,639 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:44:42,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:44:42,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1925585170, now seen corresponding path program 1 times [2022-12-13 21:44:42,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:44:42,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608492714] [2022-12-13 21:44:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:44:42,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:44:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:44:42,851 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 21:44:42,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:44:42,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608492714] [2022-12-13 21:44:42,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608492714] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:44:42,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848208969] [2022-12-13 21:44:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:44:42,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:44:42,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:44:42,853 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:44:42,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 21:44:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:44:42,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 21:44:42,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:44:42,981 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 21:44:43,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:44:43,013 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 21:44:43,041 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 21:44:43,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:44:43,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:44:43,111 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 21:44:43,117 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:44:43,117 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 21:44:43,138 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 21:44:43,150 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 21:44:43,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848208969] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:44:43,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:44:43,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-12-13 21:44:43,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832282363] [2022-12-13 21:44:43,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:44:43,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 21:44:43,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:44:43,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 21:44:43,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-12-13 21:44:43,380 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 360 [2022-12-13 21:44:43,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 155 flow. Second operand has 13 states, 13 states have (on average 139.30769230769232) internal successors, (1811), 13 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:43,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:44:43,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 360 [2022-12-13 21:44:43,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:44:49,976 INFO L130 PetriNetUnfolder]: 55987/75487 cut-off events. [2022-12-13 21:44:49,976 INFO L131 PetriNetUnfolder]: For 10075/10075 co-relation queries the response was YES. [2022-12-13 21:44:50,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164847 conditions, 75487 events. 55987/75487 cut-off events. For 10075/10075 co-relation queries the response was YES. Maximal size of possible extension queue 7174. Compared 540557 event pairs, 19090 based on Foata normal form. 0/29394 useless extension candidates. Maximal degree in co-relation 164834. Up to 48753 conditions per place. [2022-12-13 21:44:50,262 INFO L137 encePairwiseOnDemand]: 347/360 looper letters, 93 selfloop transitions, 19 changer transitions 0/114 dead transitions. [2022-12-13 21:44:50,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 114 transitions, 543 flow [2022-12-13 21:44:50,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:44:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:44:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1213 transitions. [2022-12-13 21:44:50,265 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42118055555555556 [2022-12-13 21:44:50,265 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1213 transitions. [2022-12-13 21:44:50,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1213 transitions. [2022-12-13 21:44:50,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:44:50,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1213 transitions. [2022-12-13 21:44:50,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 151.625) internal successors, (1213), 8 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:50,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 360.0) internal successors, (3240), 9 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:50,270 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 360.0) internal successors, (3240), 9 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:50,270 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 155 flow. Second operand 8 states and 1213 transitions. [2022-12-13 21:44:50,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 114 transitions, 543 flow [2022-12-13 21:44:50,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 114 transitions, 542 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:44:50,277 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 267 flow [2022-12-13 21:44:50,277 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=267, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2022-12-13 21:44:50,278 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2022-12-13 21:44:50,278 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 267 flow [2022-12-13 21:44:50,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 139.30769230769232) internal successors, (1811), 13 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:50,279 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:44:50,279 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 21:44:50,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 21:44:50,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:44:50,480 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:44:50,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:44:50,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1925585171, now seen corresponding path program 1 times [2022-12-13 21:44:50,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:44:50,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521617222] [2022-12-13 21:44:50,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:44:50,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:44:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:44:50,670 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 21:44:50,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:44:50,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521617222] [2022-12-13 21:44:50,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521617222] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:44:50,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631590095] [2022-12-13 21:44:50,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:44:50,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:44:50,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:44:50,672 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:44:50,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 21:44:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:44:50,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 21:44:50,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:44:50,795 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 21:44:50,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:44:50,818 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 14 treesize of output 16 [2022-12-13 21:44:50,837 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 21:44:50,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:44:50,864 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_262 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_262) |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 21:44:50,874 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:44:50,875 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 1 case distinctions, treesize of input 22 treesize of output 23 [2022-12-13 21:44:50,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:44:50,881 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 33 treesize of output 31 [2022-12-13 21:44:50,895 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 21:44:50,904 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 21:44:50,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631590095] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:44:50,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:44:50,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-12-13 21:44:50,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887149459] [2022-12-13 21:44:50,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:44:50,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 21:44:50,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:44:50,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 21:44:50,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2022-12-13 21:44:50,940 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 360 [2022-12-13 21:44:50,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 267 flow. Second operand has 12 states, 12 states have (on average 126.25) internal successors, (1515), 12 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:50,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:44:50,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 360 [2022-12-13 21:44:50,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:44:57,923 INFO L130 PetriNetUnfolder]: 59749/80925 cut-off events. [2022-12-13 21:44:57,923 INFO L131 PetriNetUnfolder]: For 38346/38346 co-relation queries the response was YES. [2022-12-13 21:44:58,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185480 conditions, 80925 events. 59749/80925 cut-off events. For 38346/38346 co-relation queries the response was YES. Maximal size of possible extension queue 7914. Compared 591791 event pairs, 22819 based on Foata normal form. 4/33761 useless extension candidates. Maximal degree in co-relation 185463. Up to 54141 conditions per place. [2022-12-13 21:44:58,326 INFO L137 encePairwiseOnDemand]: 347/360 looper letters, 93 selfloop transitions, 22 changer transitions 0/117 dead transitions. [2022-12-13 21:44:58,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 117 transitions, 632 flow [2022-12-13 21:44:58,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:44:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:44:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1108 transitions. [2022-12-13 21:44:58,329 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38472222222222224 [2022-12-13 21:44:58,329 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1108 transitions. [2022-12-13 21:44:58,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1108 transitions. [2022-12-13 21:44:58,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:44:58,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1108 transitions. [2022-12-13 21:44:58,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 138.5) internal successors, (1108), 8 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:58,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 360.0) internal successors, (3240), 9 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:58,499 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 360.0) internal successors, (3240), 9 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:58,499 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 267 flow. Second operand 8 states and 1108 transitions. [2022-12-13 21:44:58,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 117 transitions, 632 flow [2022-12-13 21:44:58,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 117 transitions, 623 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 21:44:58,522 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 331 flow [2022-12-13 21:44:58,522 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=331, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2022-12-13 21:44:58,522 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2022-12-13 21:44:58,522 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 331 flow [2022-12-13 21:44:58,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 126.25) internal successors, (1515), 12 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:58,523 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:44:58,523 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:44:58,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 21:44:58,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 21:44:58,725 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:44:58,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:44:58,726 INFO L85 PathProgramCache]: Analyzing trace with hash -297427627, now seen corresponding path program 1 times [2022-12-13 21:44:58,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:44:58,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474976189] [2022-12-13 21:44:58,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:44:58,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:44:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:44:58,859 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 21:44:58,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:44:58,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474976189] [2022-12-13 21:44:58,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474976189] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:44:58,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:44:58,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:44:58,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873213438] [2022-12-13 21:44:58,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:44:58,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:44:58,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:44:58,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:44:58,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:44:58,875 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 360 [2022-12-13 21:44:58,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 331 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:44:58,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:44:58,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 360 [2022-12-13 21:44:58,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:45:07,999 INFO L130 PetriNetUnfolder]: 78619/108254 cut-off events. [2022-12-13 21:45:07,999 INFO L131 PetriNetUnfolder]: For 87890/88504 co-relation queries the response was YES. [2022-12-13 21:45:08,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255030 conditions, 108254 events. 78619/108254 cut-off events. For 87890/88504 co-relation queries the response was YES. Maximal size of possible extension queue 10129. Compared 827432 event pairs, 14374 based on Foata normal form. 614/46713 useless extension candidates. Maximal degree in co-relation 255011. Up to 76201 conditions per place. [2022-12-13 21:45:08,489 INFO L137 encePairwiseOnDemand]: 349/360 looper letters, 86 selfloop transitions, 9 changer transitions 0/100 dead transitions. [2022-12-13 21:45:08,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 100 transitions, 668 flow [2022-12-13 21:45:08,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:45:08,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:45:08,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2022-12-13 21:45:08,491 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2022-12-13 21:45:08,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2022-12-13 21:45:08,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2022-12-13 21:45:08,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:45:08,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2022-12-13 21:45:08,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:08,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:08,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:08,494 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 331 flow. Second operand 3 states and 522 transitions. [2022-12-13 21:45:08,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 100 transitions, 668 flow [2022-12-13 21:45:08,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 100 transitions, 659 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 21:45:08,574 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 394 flow [2022-12-13 21:45:08,574 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=394, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2022-12-13 21:45:08,575 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2022-12-13 21:45:08,575 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 394 flow [2022-12-13 21:45:08,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:08,575 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:45:08,575 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:45:08,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 21:45:08,575 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:45:08,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:45:08,576 INFO L85 PathProgramCache]: Analyzing trace with hash -297427630, now seen corresponding path program 1 times [2022-12-13 21:45:08,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:45:08,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626625960] [2022-12-13 21:45:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:45:08,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:45:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:45:08,646 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 21:45:08,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:45:08,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626625960] [2022-12-13 21:45:08,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626625960] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:45:08,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:45:08,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:45:08,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250553634] [2022-12-13 21:45:08,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:45:08,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:45:08,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:45:08,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:45:08,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:45:08,699 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 360 [2022-12-13 21:45:08,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 394 flow. Second operand has 5 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:08,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:45:08,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 360 [2022-12-13 21:45:08,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:45:17,531 INFO L130 PetriNetUnfolder]: 70662/100723 cut-off events. [2022-12-13 21:45:17,532 INFO L131 PetriNetUnfolder]: For 108289/108469 co-relation queries the response was YES. [2022-12-13 21:45:17,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287130 conditions, 100723 events. 70662/100723 cut-off events. For 108289/108469 co-relation queries the response was YES. Maximal size of possible extension queue 8903. Compared 801454 event pairs, 44323 based on Foata normal form. 316/61634 useless extension candidates. Maximal degree in co-relation 287108. Up to 99450 conditions per place. [2022-12-13 21:45:18,044 INFO L137 encePairwiseOnDemand]: 351/360 looper letters, 107 selfloop transitions, 4 changer transitions 2/117 dead transitions. [2022-12-13 21:45:18,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 117 transitions, 777 flow [2022-12-13 21:45:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:45:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:45:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 799 transitions. [2022-12-13 21:45:18,046 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4438888888888889 [2022-12-13 21:45:18,046 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 799 transitions. [2022-12-13 21:45:18,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 799 transitions. [2022-12-13 21:45:18,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:45:18,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 799 transitions. [2022-12-13 21:45:18,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:18,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 360.0) internal successors, (2160), 6 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:18,050 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 360.0) internal successors, (2160), 6 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:18,050 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 394 flow. Second operand 5 states and 799 transitions. [2022-12-13 21:45:18,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 117 transitions, 777 flow [2022-12-13 21:45:19,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 117 transitions, 743 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:45:19,166 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 403 flow [2022-12-13 21:45:19,166 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=403, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2022-12-13 21:45:19,166 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2022-12-13 21:45:19,166 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 403 flow [2022-12-13 21:45:19,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:19,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:45:19,166 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:45:19,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 21:45:19,167 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:45:19,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:45:19,167 INFO L85 PathProgramCache]: Analyzing trace with hash -436398568, now seen corresponding path program 1 times [2022-12-13 21:45:19,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:45:19,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404602431] [2022-12-13 21:45:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:45:19,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:45:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:45:19,253 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 21:45:19,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:45:19,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404602431] [2022-12-13 21:45:19,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404602431] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:45:19,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420857541] [2022-12-13 21:45:19,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:45:19,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:45:19,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:45:19,255 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:45:19,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 21:45:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:45:19,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 21:45:19,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:45:19,404 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 21:45:19,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:45:19,441 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 21:45:19,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420857541] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:45:19,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:45:19,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-12-13 21:45:19,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88346794] [2022-12-13 21:45:19,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:45:19,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 21:45:19,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:45:19,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 21:45:19,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-13 21:45:19,614 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 360 [2022-12-13 21:45:19,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 403 flow. Second operand has 14 states, 14 states have (on average 142.28571428571428) internal successors, (1992), 14 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:19,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:45:19,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 360 [2022-12-13 21:45:19,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:45:28,686 INFO L130 PetriNetUnfolder]: 67150/92452 cut-off events. [2022-12-13 21:45:28,686 INFO L131 PetriNetUnfolder]: For 112761/112991 co-relation queries the response was YES. [2022-12-13 21:45:28,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271139 conditions, 92452 events. 67150/92452 cut-off events. For 112761/112991 co-relation queries the response was YES. Maximal size of possible extension queue 8216. Compared 690236 event pairs, 28629 based on Foata normal form. 1775/55291 useless extension candidates. Maximal degree in co-relation 271115. Up to 64118 conditions per place. [2022-12-13 21:45:29,161 INFO L137 encePairwiseOnDemand]: 348/360 looper letters, 293 selfloop transitions, 13 changer transitions 3/312 dead transitions. [2022-12-13 21:45:29,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 312 transitions, 1940 flow [2022-12-13 21:45:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 21:45:29,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 21:45:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1925 transitions. [2022-12-13 21:45:29,165 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44560185185185186 [2022-12-13 21:45:29,165 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1925 transitions. [2022-12-13 21:45:29,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1925 transitions. [2022-12-13 21:45:29,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:45:29,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1925 transitions. [2022-12-13 21:45:29,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 160.41666666666666) internal successors, (1925), 12 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:29,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 360.0) internal successors, (4680), 13 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:29,172 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 360.0) internal successors, (4680), 13 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:29,172 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 403 flow. Second operand 12 states and 1925 transitions. [2022-12-13 21:45:29,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 312 transitions, 1940 flow [2022-12-13 21:45:29,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 312 transitions, 1935 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:45:29,283 INFO L231 Difference]: Finished difference. Result has 93 places, 82 transitions, 523 flow [2022-12-13 21:45:29,283 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=523, PETRI_PLACES=93, PETRI_TRANSITIONS=82} [2022-12-13 21:45:29,283 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2022-12-13 21:45:29,283 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 82 transitions, 523 flow [2022-12-13 21:45:29,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 142.28571428571428) internal successors, (1992), 14 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:29,284 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:45:29,284 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:45:29,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 21:45:29,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:45:29,485 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:45:29,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:45:29,487 INFO L85 PathProgramCache]: Analyzing trace with hash -436398818, now seen corresponding path program 1 times [2022-12-13 21:45:29,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:45:29,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944775989] [2022-12-13 21:45:29,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:45:29,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:45:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:45:29,690 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 21:45:29,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:45:29,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944775989] [2022-12-13 21:45:29,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944775989] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:45:29,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673153687] [2022-12-13 21:45:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:45:29,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:45:29,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:45:29,692 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:45:29,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 21:45:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:45:29,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 21:45:29,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:45:29,815 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 21:45:29,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:45:29,844 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 21:45:29,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:45:29,887 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 21:45:29,895 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 21:45:29,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:45:29,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:45:29,965 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 21:45:29,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:45:29,972 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 21:45:29,975 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 21:45:29,979 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 21:45:30,017 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 21:45:30,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673153687] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:45:30,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:45:30,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-12-13 21:45:30,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936922691] [2022-12-13 21:45:30,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:45:30,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 21:45:30,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:45:30,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 21:45:30,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=182, Unknown=6, NotChecked=0, Total=240 [2022-12-13 21:45:30,192 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 360 [2022-12-13 21:45:30,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 82 transitions, 523 flow. Second operand has 16 states, 16 states have (on average 125.25) internal successors, (2004), 16 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:30,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:45:30,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 360 [2022-12-13 21:45:30,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:45:38,924 INFO L130 PetriNetUnfolder]: 63133/87043 cut-off events. [2022-12-13 21:45:38,924 INFO L131 PetriNetUnfolder]: For 134970/135196 co-relation queries the response was YES. [2022-12-13 21:45:39,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271027 conditions, 87043 events. 63133/87043 cut-off events. For 134970/135196 co-relation queries the response was YES. Maximal size of possible extension queue 7760. Compared 653895 event pairs, 13094 based on Foata normal form. 286/51032 useless extension candidates. Maximal degree in co-relation 270999. Up to 60807 conditions per place. [2022-12-13 21:45:39,406 INFO L137 encePairwiseOnDemand]: 348/360 looper letters, 155 selfloop transitions, 34 changer transitions 1/193 dead transitions. [2022-12-13 21:45:39,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 193 transitions, 1424 flow [2022-12-13 21:45:39,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:45:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:45:39,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1122 transitions. [2022-12-13 21:45:39,410 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38958333333333334 [2022-12-13 21:45:39,410 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1122 transitions. [2022-12-13 21:45:39,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1122 transitions. [2022-12-13 21:45:39,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:45:39,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1122 transitions. [2022-12-13 21:45:39,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 140.25) internal successors, (1122), 8 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 21:45:39,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 360.0) internal successors, (3240), 9 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:39,419 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 360.0) internal successors, (3240), 9 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:39,419 INFO L175 Difference]: Start difference. First operand has 93 places, 82 transitions, 523 flow. Second operand 8 states and 1122 transitions. [2022-12-13 21:45:39,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 193 transitions, 1424 flow [2022-12-13 21:45:39,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 193 transitions, 1411 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 21:45:39,662 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 765 flow [2022-12-13 21:45:39,662 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=765, PETRI_PLACES=99, PETRI_TRANSITIONS=96} [2022-12-13 21:45:39,663 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2022-12-13 21:45:39,663 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 765 flow [2022-12-13 21:45:39,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 125.25) internal successors, (2004), 16 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:39,664 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:45:39,664 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:45:39,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 21:45:39,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:45:39,865 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:45:39,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:45:39,867 INFO L85 PathProgramCache]: Analyzing trace with hash -436398819, now seen corresponding path program 1 times [2022-12-13 21:45:39,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:45:39,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325047599] [2022-12-13 21:45:39,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:45:39,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:45:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:45:40,042 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 21:45:40,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:45:40,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325047599] [2022-12-13 21:45:40,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325047599] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:45:40,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268319766] [2022-12-13 21:45:40,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:45:40,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:45:40,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:45:40,044 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:45:40,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 21:45:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:45:40,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 21:45:40,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:45:40,168 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 21:45:40,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:45:40,196 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 21:45:40,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:45:40,244 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 21:45:40,252 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 21:45:40,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:45:40,289 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_422 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_422) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2022-12-13 21:45:40,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:45:40,327 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 21:45:40,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:45:40,334 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 21:45:40,337 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 21:45:40,341 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 21:45:40,395 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 21:45:40,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268319766] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:45:40,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:45:40,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-12-13 21:45:40,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764288513] [2022-12-13 21:45:40,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:45:40,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 21:45:40,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:45:40,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 21:45:40,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=159, Unknown=8, NotChecked=26, Total=240 [2022-12-13 21:45:40,411 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 360 [2022-12-13 21:45:40,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 765 flow. Second operand has 16 states, 16 states have (on average 123.25) internal successors, (1972), 16 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:40,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:45:40,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 360 [2022-12-13 21:45:40,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:45:49,601 INFO L130 PetriNetUnfolder]: 62748/85292 cut-off events. [2022-12-13 21:45:49,601 INFO L131 PetriNetUnfolder]: For 193039/193269 co-relation queries the response was YES. [2022-12-13 21:45:49,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278266 conditions, 85292 events. 62748/85292 cut-off events. For 193039/193269 co-relation queries the response was YES. Maximal size of possible extension queue 7788. Compared 622413 event pairs, 19677 based on Foata normal form. 290/49788 useless extension candidates. Maximal degree in co-relation 278235. Up to 59480 conditions per place. [2022-12-13 21:45:50,091 INFO L137 encePairwiseOnDemand]: 348/360 looper letters, 154 selfloop transitions, 35 changer transitions 1/193 dead transitions. [2022-12-13 21:45:50,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 193 transitions, 1521 flow [2022-12-13 21:45:50,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:45:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:45:50,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1105 transitions. [2022-12-13 21:45:50,094 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3836805555555556 [2022-12-13 21:45:50,094 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1105 transitions. [2022-12-13 21:45:50,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1105 transitions. [2022-12-13 21:45:50,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:45:50,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1105 transitions. [2022-12-13 21:45:50,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 138.125) internal successors, (1105), 8 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:50,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 360.0) internal successors, (3240), 9 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:50,099 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 360.0) internal successors, (3240), 9 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:50,099 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 765 flow. Second operand 8 states and 1105 transitions. [2022-12-13 21:45:50,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 193 transitions, 1521 flow [2022-12-13 21:45:50,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 193 transitions, 1496 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-12-13 21:45:50,383 INFO L231 Difference]: Finished difference. Result has 105 places, 97 transitions, 815 flow [2022-12-13 21:45:50,383 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=815, PETRI_PLACES=105, PETRI_TRANSITIONS=97} [2022-12-13 21:45:50,383 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2022-12-13 21:45:50,384 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 97 transitions, 815 flow [2022-12-13 21:45:50,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 123.25) internal successors, (1972), 16 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:50,384 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:45:50,384 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 21:45:50,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 21:45:50,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 21:45:50,586 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:45:50,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:45:50,587 INFO L85 PathProgramCache]: Analyzing trace with hash -776463406, now seen corresponding path program 1 times [2022-12-13 21:45:50,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:45:50,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221273489] [2022-12-13 21:45:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:45:50,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:45:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:45:50,648 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 21:45:50,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:45:50,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221273489] [2022-12-13 21:45:50,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221273489] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:45:50,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:45:50,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:45:50,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110250706] [2022-12-13 21:45:50,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:45:50,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:45:50,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:45:50,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:45:50,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:45:50,653 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 360 [2022-12-13 21:45:50,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 97 transitions, 815 flow. Second operand has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:50,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:45:50,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 360 [2022-12-13 21:45:50,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:45:58,899 INFO L130 PetriNetUnfolder]: 56995/77739 cut-off events. [2022-12-13 21:45:58,899 INFO L131 PetriNetUnfolder]: For 203506/203736 co-relation queries the response was YES. [2022-12-13 21:45:59,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258623 conditions, 77739 events. 56995/77739 cut-off events. For 203506/203736 co-relation queries the response was YES. Maximal size of possible extension queue 6762. Compared 558593 event pairs, 26820 based on Foata normal form. 230/46422 useless extension candidates. Maximal degree in co-relation 258590. Up to 73486 conditions per place. [2022-12-13 21:45:59,358 INFO L137 encePairwiseOnDemand]: 358/360 looper letters, 117 selfloop transitions, 7 changer transitions 0/127 dead transitions. [2022-12-13 21:45:59,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 127 transitions, 1147 flow [2022-12-13 21:45:59,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:45:59,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:45:59,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2022-12-13 21:45:59,360 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2022-12-13 21:45:59,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2022-12-13 21:45:59,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2022-12-13 21:45:59,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:45:59,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2022-12-13 21:45:59,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:59,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:59,362 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:59,362 INFO L175 Difference]: Start difference. First operand has 105 places, 97 transitions, 815 flow. Second operand 3 states and 516 transitions. [2022-12-13 21:45:59,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 127 transitions, 1147 flow [2022-12-13 21:45:59,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 127 transitions, 1123 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-13 21:45:59,777 INFO L231 Difference]: Finished difference. Result has 103 places, 94 transitions, 758 flow [2022-12-13 21:45:59,777 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=758, PETRI_PLACES=103, PETRI_TRANSITIONS=94} [2022-12-13 21:45:59,777 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2022-12-13 21:45:59,778 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 94 transitions, 758 flow [2022-12-13 21:45:59,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:59,778 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:45:59,778 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 21:45:59,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 21:45:59,778 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:45:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:45:59,778 INFO L85 PathProgramCache]: Analyzing trace with hash -776463478, now seen corresponding path program 2 times [2022-12-13 21:45:59,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:45:59,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139756576] [2022-12-13 21:45:59,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:45:59,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:45:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:45:59,827 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 21:45:59,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:45:59,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139756576] [2022-12-13 21:45:59,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139756576] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:45:59,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:45:59,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:45:59,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140234222] [2022-12-13 21:45:59,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:45:59,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:45:59,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:45:59,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:45:59,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:45:59,833 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 360 [2022-12-13 21:45:59,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 94 transitions, 758 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:45:59,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:45:59,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 360 [2022-12-13 21:45:59,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:46:07,326 INFO L130 PetriNetUnfolder]: 52429/71080 cut-off events. [2022-12-13 21:46:07,326 INFO L131 PetriNetUnfolder]: For 243677/245833 co-relation queries the response was YES. [2022-12-13 21:46:07,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238423 conditions, 71080 events. 52429/71080 cut-off events. For 243677/245833 co-relation queries the response was YES. Maximal size of possible extension queue 6159. Compared 502891 event pairs, 27815 based on Foata normal form. 2153/45283 useless extension candidates. Maximal degree in co-relation 238390. Up to 70699 conditions per place. [2022-12-13 21:46:07,757 INFO L137 encePairwiseOnDemand]: 358/360 looper letters, 80 selfloop transitions, 1 changer transitions 0/91 dead transitions. [2022-12-13 21:46:07,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 91 transitions, 871 flow [2022-12-13 21:46:07,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:46:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:46:07,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2022-12-13 21:46:07,759 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4546296296296296 [2022-12-13 21:46:07,760 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2022-12-13 21:46:07,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2022-12-13 21:46:07,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:46:07,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2022-12-13 21:46:07,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:07,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:07,762 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:07,762 INFO L175 Difference]: Start difference. First operand has 103 places, 94 transitions, 758 flow. Second operand 3 states and 491 transitions. [2022-12-13 21:46:07,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 91 transitions, 871 flow [2022-12-13 21:46:08,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 91 transitions, 864 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:46:08,158 INFO L231 Difference]: Finished difference. Result has 103 places, 91 transitions, 704 flow [2022-12-13 21:46:08,158 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=704, PETRI_PLACES=103, PETRI_TRANSITIONS=91} [2022-12-13 21:46:08,158 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2022-12-13 21:46:08,158 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 91 transitions, 704 flow [2022-12-13 21:46:08,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:08,158 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:46:08,159 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:46:08,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 21:46:08,159 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:46:08,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:08,159 INFO L85 PathProgramCache]: Analyzing trace with hash -637492536, now seen corresponding path program 1 times [2022-12-13 21:46:08,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:08,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255939442] [2022-12-13 21:46:08,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:08,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:08,185 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 21:46:08,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:08,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255939442] [2022-12-13 21:46:08,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255939442] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:46:08,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:46:08,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:46:08,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809384747] [2022-12-13 21:46:08,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:46:08,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:46:08,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:08,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:46:08,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:46:08,190 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 360 [2022-12-13 21:46:08,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 91 transitions, 704 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:08,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:46:08,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 360 [2022-12-13 21:46:08,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:46:16,309 INFO L130 PetriNetUnfolder]: 54162/74512 cut-off events. [2022-12-13 21:46:16,309 INFO L131 PetriNetUnfolder]: For 263905/266245 co-relation queries the response was YES. [2022-12-13 21:46:16,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250364 conditions, 74512 events. 54162/74512 cut-off events. For 263905/266245 co-relation queries the response was YES. Maximal size of possible extension queue 5989. Compared 540583 event pairs, 9031 based on Foata normal form. 3408/49148 useless extension candidates. Maximal degree in co-relation 250330. Up to 55033 conditions per place. [2022-12-13 21:46:16,784 INFO L137 encePairwiseOnDemand]: 349/360 looper letters, 119 selfloop transitions, 15 changer transitions 0/144 dead transitions. [2022-12-13 21:46:16,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 144 transitions, 1335 flow [2022-12-13 21:46:16,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:46:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:46:16,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2022-12-13 21:46:16,786 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47962962962962963 [2022-12-13 21:46:16,786 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2022-12-13 21:46:16,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2022-12-13 21:46:16,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:46:16,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2022-12-13 21:46:16,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:16,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:16,788 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:16,788 INFO L175 Difference]: Start difference. First operand has 103 places, 91 transitions, 704 flow. Second operand 3 states and 518 transitions. [2022-12-13 21:46:16,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 144 transitions, 1335 flow [2022-12-13 21:46:17,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 144 transitions, 1334 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:46:17,100 INFO L231 Difference]: Finished difference. Result has 106 places, 105 transitions, 857 flow [2022-12-13 21:46:17,100 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=857, PETRI_PLACES=106, PETRI_TRANSITIONS=105} [2022-12-13 21:46:17,100 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2022-12-13 21:46:17,100 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 105 transitions, 857 flow [2022-12-13 21:46:17,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:17,100 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:46:17,100 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:46:17,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 21:46:17,101 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:46:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:17,101 INFO L85 PathProgramCache]: Analyzing trace with hash -637492540, now seen corresponding path program 1 times [2022-12-13 21:46:17,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:17,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320471815] [2022-12-13 21:46:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:17,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:17,251 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 21:46:17,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:17,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320471815] [2022-12-13 21:46:17,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320471815] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:46:17,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446388602] [2022-12-13 21:46:17,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:17,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:17,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:46:17,253 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:46:17,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 21:46:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:17,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 21:46:17,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:46:17,390 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 21:46:17,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:46:17,467 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 21:46:17,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:46:17,490 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 21:46:17,506 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 21:46:17,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:46:17,530 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_526 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_526) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2022-12-13 21:46:17,538 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_526 (Array Int Int)) (v_ArrVal_525 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_525) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_526) |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 21:46:17,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:46:17,546 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 21:46:17,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:46:17,552 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 73 treesize of output 71 [2022-12-13 21:46:17,556 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 26 [2022-12-13 21:46:17,559 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 50 [2022-12-13 21:46:17,591 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 21:46:17,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446388602] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:46:17,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:46:17,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-12-13 21:46:17,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293218156] [2022-12-13 21:46:17,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:46:17,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 21:46:17,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:17,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 21:46:17,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=122, Unknown=2, NotChecked=46, Total=210 [2022-12-13 21:46:17,621 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 360 [2022-12-13 21:46:17,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 105 transitions, 857 flow. Second operand has 15 states, 15 states have (on average 123.4) internal successors, (1851), 15 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:17,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:46:17,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 360 [2022-12-13 21:46:17,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:46:28,827 INFO L130 PetriNetUnfolder]: 70559/101990 cut-off events. [2022-12-13 21:46:28,827 INFO L131 PetriNetUnfolder]: For 420477/422781 co-relation queries the response was YES. [2022-12-13 21:46:29,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387041 conditions, 101990 events. 70559/101990 cut-off events. For 420477/422781 co-relation queries the response was YES. Maximal size of possible extension queue 8075. Compared 836878 event pairs, 21003 based on Foata normal form. 2301/70822 useless extension candidates. Maximal degree in co-relation 387004. Up to 58720 conditions per place. [2022-12-13 21:46:29,570 INFO L137 encePairwiseOnDemand]: 347/360 looper letters, 172 selfloop transitions, 45 changer transitions 1/226 dead transitions. [2022-12-13 21:46:29,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 226 transitions, 2144 flow [2022-12-13 21:46:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:46:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:46:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1097 transitions. [2022-12-13 21:46:29,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38090277777777776 [2022-12-13 21:46:29,573 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1097 transitions. [2022-12-13 21:46:29,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1097 transitions. [2022-12-13 21:46:29,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:46:29,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1097 transitions. [2022-12-13 21:46:29,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 137.125) internal successors, (1097), 8 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:29,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 360.0) internal successors, (3240), 9 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:29,577 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 360.0) internal successors, (3240), 9 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:29,577 INFO L175 Difference]: Start difference. First operand has 106 places, 105 transitions, 857 flow. Second operand 8 states and 1097 transitions. [2022-12-13 21:46:29,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 226 transitions, 2144 flow [2022-12-13 21:46:30,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 226 transitions, 2076 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:46:30,482 INFO L231 Difference]: Finished difference. Result has 114 places, 134 transitions, 1188 flow [2022-12-13 21:46:30,482 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1188, PETRI_PLACES=114, PETRI_TRANSITIONS=134} [2022-12-13 21:46:30,483 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2022-12-13 21:46:30,483 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 134 transitions, 1188 flow [2022-12-13 21:46:30,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 123.4) internal successors, (1851), 15 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:30,483 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:46:30,483 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:46:30,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 21:46:30,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 21:46:30,685 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:46:30,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:30,686 INFO L85 PathProgramCache]: Analyzing trace with hash -637492539, now seen corresponding path program 1 times [2022-12-13 21:46:30,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:30,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970189600] [2022-12-13 21:46:30,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:30,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:30,850 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 21:46:30,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:30,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970189600] [2022-12-13 21:46:30,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970189600] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:46:30,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765939421] [2022-12-13 21:46:30,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:30,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:30,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:46:30,852 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:46:30,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 21:46:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:30,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 21:46:30,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:46:30,997 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 21:46:31,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:46:31,026 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 21:46:31,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:46:31,048 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 21:46:31,065 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 21:46:31,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:46:31,086 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_570 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_570) c_~A~0.base) c_~A~0.offset) 4294967296)) is different from false [2022-12-13 21:46:31,120 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:46:31,120 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 21:46:31,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:46:31,126 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 21:46:31,128 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 21:46:31,132 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 21:46:31,177 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 21:46:31,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765939421] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:46:31,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:46:31,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-12-13 21:46:31,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453560661] [2022-12-13 21:46:31,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:46:31,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 21:46:31,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:31,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 21:46:31,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=142, Unknown=2, NotChecked=24, Total=210 [2022-12-13 21:46:31,219 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 360 [2022-12-13 21:46:31,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 134 transitions, 1188 flow. Second operand has 15 states, 15 states have (on average 123.4) internal successors, (1851), 15 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:31,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:46:31,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 360 [2022-12-13 21:46:31,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:46:42,901 INFO L130 PetriNetUnfolder]: 70166/102130 cut-off events. [2022-12-13 21:46:42,901 INFO L131 PetriNetUnfolder]: For 419840/421319 co-relation queries the response was YES. [2022-12-13 21:46:43,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390736 conditions, 102130 events. 70166/102130 cut-off events. For 419840/421319 co-relation queries the response was YES. Maximal size of possible extension queue 8602. Compared 850280 event pairs, 20054 based on Foata normal form. 1476/71303 useless extension candidates. Maximal degree in co-relation 390696. Up to 59946 conditions per place. [2022-12-13 21:46:43,637 INFO L137 encePairwiseOnDemand]: 349/360 looper letters, 171 selfloop transitions, 61 changer transitions 1/241 dead transitions. [2022-12-13 21:46:43,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 241 transitions, 2435 flow [2022-12-13 21:46:43,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:46:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:46:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1094 transitions. [2022-12-13 21:46:43,640 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3798611111111111 [2022-12-13 21:46:43,640 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1094 transitions. [2022-12-13 21:46:43,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1094 transitions. [2022-12-13 21:46:43,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:46:43,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1094 transitions. [2022-12-13 21:46:43,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 136.75) internal successors, (1094), 8 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:43,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 360.0) internal successors, (3240), 9 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:43,645 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 360.0) internal successors, (3240), 9 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:43,645 INFO L175 Difference]: Start difference. First operand has 114 places, 134 transitions, 1188 flow. Second operand 8 states and 1094 transitions. [2022-12-13 21:46:43,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 241 transitions, 2435 flow [2022-12-13 21:46:44,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 241 transitions, 2426 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 21:46:44,699 INFO L231 Difference]: Finished difference. Result has 119 places, 150 transitions, 1483 flow [2022-12-13 21:46:44,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1483, PETRI_PLACES=119, PETRI_TRANSITIONS=150} [2022-12-13 21:46:44,700 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2022-12-13 21:46:44,700 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 150 transitions, 1483 flow [2022-12-13 21:46:44,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 123.4) internal successors, (1851), 15 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:44,701 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:46:44,701 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 21:46:44,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 21:46:44,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:44,902 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:46:44,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:44,904 INFO L85 PathProgramCache]: Analyzing trace with hash -776463484, now seen corresponding path program 1 times [2022-12-13 21:46:44,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:44,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580555681] [2022-12-13 21:46:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:44,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:44,969 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 21:46:44,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:44,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580555681] [2022-12-13 21:46:44,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580555681] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:46:44,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:46:44,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:46:44,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702634653] [2022-12-13 21:46:44,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:46:44,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:46:44,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:44,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:46:44,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:46:44,973 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 360 [2022-12-13 21:46:44,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 150 transitions, 1483 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:44,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:46:44,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 360 [2022-12-13 21:46:44,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:46:54,829 INFO L130 PetriNetUnfolder]: 61945/90612 cut-off events. [2022-12-13 21:46:54,830 INFO L131 PetriNetUnfolder]: For 435564/437001 co-relation queries the response was YES. [2022-12-13 21:46:55,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352931 conditions, 90612 events. 61945/90612 cut-off events. For 435564/437001 co-relation queries the response was YES. Maximal size of possible extension queue 7378. Compared 748197 event pairs, 36532 based on Foata normal form. 3009/66162 useless extension candidates. Maximal degree in co-relation 352890. Up to 90193 conditions per place. [2022-12-13 21:46:55,668 INFO L137 encePairwiseOnDemand]: 358/360 looper letters, 135 selfloop transitions, 1 changer transitions 0/147 dead transitions. [2022-12-13 21:46:55,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 147 transitions, 1706 flow [2022-12-13 21:46:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:46:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:46:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2022-12-13 21:46:55,671 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4537037037037037 [2022-12-13 21:46:55,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2022-12-13 21:46:55,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2022-12-13 21:46:55,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:46:55,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2022-12-13 21:46:55,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:55,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:55,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:55,673 INFO L175 Difference]: Start difference. First operand has 119 places, 150 transitions, 1483 flow. Second operand 3 states and 490 transitions. [2022-12-13 21:46:55,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 147 transitions, 1706 flow [2022-12-13 21:46:56,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 147 transitions, 1682 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-12-13 21:46:56,328 INFO L231 Difference]: Finished difference. Result has 116 places, 147 transitions, 1412 flow [2022-12-13 21:46:56,329 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1412, PETRI_PLACES=116, PETRI_TRANSITIONS=147} [2022-12-13 21:46:56,329 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 60 predicate places. [2022-12-13 21:46:56,329 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 147 transitions, 1412 flow [2022-12-13 21:46:56,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:56,329 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:46:56,329 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 21:46:56,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 21:46:56,330 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:46:56,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:46:56,330 INFO L85 PathProgramCache]: Analyzing trace with hash -776463404, now seen corresponding path program 1 times [2022-12-13 21:46:56,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:46:56,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130262867] [2022-12-13 21:46:56,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:56,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:46:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 21:46:56,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:46:56,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130262867] [2022-12-13 21:46:56,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130262867] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:46:56,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092510088] [2022-12-13 21:46:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:46:56,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:46:56,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:46:56,376 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:46:56,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 21:46:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:46:56,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 21:46:56,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:46:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 21:46:56,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:46:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 21:46:56,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092510088] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:46:56,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:46:56,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 21:46:56,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478472365] [2022-12-13 21:46:56,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:46:56,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:46:56,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:46:56,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:46:56,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 21:46:56,517 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 360 [2022-12-13 21:46:56,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 147 transitions, 1412 flow. Second operand has 7 states, 7 states have (on average 152.71428571428572) internal successors, (1069), 7 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:46:56,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:46:56,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 360 [2022-12-13 21:46:56,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:47:17,580 INFO L130 PetriNetUnfolder]: 132443/194683 cut-off events. [2022-12-13 21:47:17,581 INFO L131 PetriNetUnfolder]: For 728750/728917 co-relation queries the response was YES. [2022-12-13 21:47:18,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740454 conditions, 194683 events. 132443/194683 cut-off events. For 728750/728917 co-relation queries the response was YES. Maximal size of possible extension queue 13107. Compared 1744268 event pairs, 44861 based on Foata normal form. 4922/140513 useless extension candidates. Maximal degree in co-relation 740413. Up to 53811 conditions per place. [2022-12-13 21:47:19,193 INFO L137 encePairwiseOnDemand]: 357/360 looper letters, 476 selfloop transitions, 16 changer transitions 0/496 dead transitions. [2022-12-13 21:47:19,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 496 transitions, 5324 flow [2022-12-13 21:47:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:47:19,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 21:47:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1070 transitions. [2022-12-13 21:47:19,196 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2022-12-13 21:47:19,196 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1070 transitions. [2022-12-13 21:47:19,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1070 transitions. [2022-12-13 21:47:19,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:47:19,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1070 transitions. [2022-12-13 21:47:19,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 178.33333333333334) internal successors, (1070), 6 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:19,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:19,199 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:19,199 INFO L175 Difference]: Start difference. First operand has 116 places, 147 transitions, 1412 flow. Second operand 6 states and 1070 transitions. [2022-12-13 21:47:19,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 496 transitions, 5324 flow [2022-12-13 21:47:31,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 496 transitions, 5323 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:47:31,325 INFO L231 Difference]: Finished difference. Result has 123 places, 150 transitions, 1492 flow [2022-12-13 21:47:31,326 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1492, PETRI_PLACES=123, PETRI_TRANSITIONS=150} [2022-12-13 21:47:31,326 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 67 predicate places. [2022-12-13 21:47:31,326 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 150 transitions, 1492 flow [2022-12-13 21:47:31,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 152.71428571428572) internal successors, (1069), 7 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:31,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:47:31,326 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 21:47:31,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 21:47:31,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:47:31,528 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:47:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:47:31,529 INFO L85 PathProgramCache]: Analyzing trace with hash -776463480, now seen corresponding path program 1 times [2022-12-13 21:47:31,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:47:31,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976024149] [2022-12-13 21:47:31,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:47:31,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:47:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:47:31,823 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 21:47:31,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:47:31,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976024149] [2022-12-13 21:47:31,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976024149] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:47:31,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283591364] [2022-12-13 21:47:31,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:47:31,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:47:31,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:47:31,824 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:47:31,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 21:47:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:47:31,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 21:47:31,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:47:31,943 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 21:47:31,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:47:31,963 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 21:47:32,005 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 21:47:32,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:47:32,048 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_673 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_673) |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 21:47:32,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:47:32,057 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 21:47:32,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:47:32,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 33 [2022-12-13 21:47:32,099 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 21:47:32,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283591364] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:47:32,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:47:32,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-12-13 21:47:32,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108253137] [2022-12-13 21:47:32,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:47:32,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 21:47:32,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:47:32,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 21:47:32,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=289, Unknown=1, NotChecked=34, Total=380 [2022-12-13 21:47:32,111 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 360 [2022-12-13 21:47:32,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 150 transitions, 1492 flow. Second operand has 20 states, 20 states have (on average 126.2) internal successors, (2524), 20 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:32,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:47:32,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 360 [2022-12-13 21:47:32,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:47:54,173 INFO L130 PetriNetUnfolder]: 131146/193407 cut-off events. [2022-12-13 21:47:54,173 INFO L131 PetriNetUnfolder]: For 841575/841683 co-relation queries the response was YES. [2022-12-13 21:47:54,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755308 conditions, 193407 events. 131146/193407 cut-off events. For 841575/841683 co-relation queries the response was YES. Maximal size of possible extension queue 13006. Compared 1732640 event pairs, 57450 based on Foata normal form. 111/135268 useless extension candidates. Maximal degree in co-relation 755264. Up to 144013 conditions per place. [2022-12-13 21:47:55,641 INFO L137 encePairwiseOnDemand]: 350/360 looper letters, 320 selfloop transitions, 31 changer transitions 1/356 dead transitions. [2022-12-13 21:47:55,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 356 transitions, 3613 flow [2022-12-13 21:47:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 21:47:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 21:47:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1654 transitions. [2022-12-13 21:47:55,644 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38287037037037036 [2022-12-13 21:47:55,644 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1654 transitions. [2022-12-13 21:47:55,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1654 transitions. [2022-12-13 21:47:55,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:47:55,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1654 transitions. [2022-12-13 21:47:55,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 137.83333333333334) internal successors, (1654), 12 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:55,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 360.0) internal successors, (4680), 13 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:55,649 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 360.0) internal successors, (4680), 13 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:55,650 INFO L175 Difference]: Start difference. First operand has 123 places, 150 transitions, 1492 flow. Second operand 12 states and 1654 transitions. [2022-12-13 21:47:55,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 356 transitions, 3613 flow [2022-12-13 21:47:58,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 356 transitions, 3588 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 21:47:58,495 INFO L231 Difference]: Finished difference. Result has 136 places, 157 transitions, 1618 flow [2022-12-13 21:47:58,495 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1618, PETRI_PLACES=136, PETRI_TRANSITIONS=157} [2022-12-13 21:47:58,495 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 80 predicate places. [2022-12-13 21:47:58,495 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 157 transitions, 1618 flow [2022-12-13 21:47:58,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 126.2) internal successors, (2524), 20 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:58,495 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:47:58,495 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 21:47:58,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 21:47:58,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:47:58,697 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:47:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:47:58,698 INFO L85 PathProgramCache]: Analyzing trace with hash -776463481, now seen corresponding path program 1 times [2022-12-13 21:47:58,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:47:58,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357295407] [2022-12-13 21:47:58,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:47:58,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:47:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:47:58,918 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 21:47:58,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:47:58,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357295407] [2022-12-13 21:47:58,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357295407] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:47:58,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030035995] [2022-12-13 21:47:58,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:47:58,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:47:58,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:47:58,920 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:47:58,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 21:47:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:47:59,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 21:47:59,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:47:59,069 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 21:47:59,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:47:59,095 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 21:47:59,127 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 21:47:59,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:47:59,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:47:59,189 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 21:47:59,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:47:59,194 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 21:47:59,205 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 21:47:59,231 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 21:47:59,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030035995] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:47:59,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:47:59,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-12-13 21:47:59,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114306237] [2022-12-13 21:47:59,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:47:59,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 21:47:59,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:47:59,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 21:47:59,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=252, Unknown=3, NotChecked=0, Total=306 [2022-12-13 21:47:59,510 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 360 [2022-12-13 21:47:59,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 157 transitions, 1618 flow. Second operand has 18 states, 18 states have (on average 130.22222222222223) internal successors, (2344), 18 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:47:59,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:47:59,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 360 [2022-12-13 21:47:59,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:48:22,648 INFO L130 PetriNetUnfolder]: 131103/193308 cut-off events. [2022-12-13 21:48:22,648 INFO L131 PetriNetUnfolder]: For 894623/894766 co-relation queries the response was YES. [2022-12-13 21:48:23,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759675 conditions, 193308 events. 131103/193308 cut-off events. For 894623/894766 co-relation queries the response was YES. Maximal size of possible extension queue 13004. Compared 1731100 event pairs, 60659 based on Foata normal form. 144/135209 useless extension candidates. Maximal degree in co-relation 759626. Up to 143932 conditions per place. [2022-12-13 21:48:24,278 INFO L137 encePairwiseOnDemand]: 350/360 looper letters, 319 selfloop transitions, 30 changer transitions 1/354 dead transitions. [2022-12-13 21:48:24,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 354 transitions, 3647 flow [2022-12-13 21:48:24,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 21:48:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 21:48:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1701 transitions. [2022-12-13 21:48:24,282 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39375 [2022-12-13 21:48:24,282 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1701 transitions. [2022-12-13 21:48:24,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1701 transitions. [2022-12-13 21:48:24,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:48:24,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1701 transitions. [2022-12-13 21:48:24,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 141.75) internal successors, (1701), 12 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:24,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 360.0) internal successors, (4680), 13 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:24,288 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 360.0) internal successors, (4680), 13 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:24,289 INFO L175 Difference]: Start difference. First operand has 136 places, 157 transitions, 1618 flow. Second operand 12 states and 1701 transitions. [2022-12-13 21:48:24,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 354 transitions, 3647 flow [2022-12-13 21:48:27,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 354 transitions, 3579 flow, removed 5 selfloop flow, removed 7 redundant places. [2022-12-13 21:48:27,350 INFO L231 Difference]: Finished difference. Result has 140 places, 156 transitions, 1600 flow [2022-12-13 21:48:27,350 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1600, PETRI_PLACES=140, PETRI_TRANSITIONS=156} [2022-12-13 21:48:27,350 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2022-12-13 21:48:27,351 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 156 transitions, 1600 flow [2022-12-13 21:48:27,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 130.22222222222223) internal successors, (2344), 18 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:27,351 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:48:27,351 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:48:27,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 21:48:27,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:48:27,553 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:48:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:48:27,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1712552102, now seen corresponding path program 1 times [2022-12-13 21:48:27,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:48:27,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408194302] [2022-12-13 21:48:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:48:27,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:48:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:48:27,754 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 21:48:27,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:48:27,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408194302] [2022-12-13 21:48:27,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408194302] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:48:27,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131440850] [2022-12-13 21:48:27,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:48:27,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:48:27,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:48:27,756 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:48:27,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 21:48:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:48:27,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 21:48:27,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:48:27,903 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 21:48:27,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:48:27,936 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 21:48:27,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:48:27,965 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 21:48:28,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:48:28,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 21:48:28,010 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 21:48:28,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:48:28,043 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_765 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_765) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2022-12-13 21:48:28,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:48:28,115 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 30 treesize of output 31 [2022-12-13 21:48:28,123 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:48:28,124 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 1107 treesize of output 1077 [2022-12-13 21:48:28,132 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 1062 treesize of output 1046 [2022-12-13 21:48:28,145 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 1046 treesize of output 1014 [2022-12-13 21:48:28,154 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 1014 treesize of output 950 [2022-12-13 21:48:30,305 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 21:48:30,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131440850] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:48:30,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:48:30,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-12-13 21:48:30,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546219070] [2022-12-13 21:48:30,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:48:30,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 21:48:30,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:48:30,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 21:48:30,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=234, Unknown=16, NotChecked=32, Total=342 [2022-12-13 21:48:30,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 360 [2022-12-13 21:48:30,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 156 transitions, 1600 flow. Second operand has 19 states, 19 states have (on average 120.36842105263158) internal successors, (2287), 19 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:30,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:48:30,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 360 [2022-12-13 21:48:30,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:48:53,006 INFO L130 PetriNetUnfolder]: 126166/186279 cut-off events. [2022-12-13 21:48:53,007 INFO L131 PetriNetUnfolder]: For 856710/856853 co-relation queries the response was YES. [2022-12-13 21:48:53,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728894 conditions, 186279 events. 126166/186279 cut-off events. For 856710/856853 co-relation queries the response was YES. Maximal size of possible extension queue 13016. Compared 1667922 event pairs, 63181 based on Foata normal form. 2179/132162 useless extension candidates. Maximal degree in co-relation 728847. Up to 110721 conditions per place. [2022-12-13 21:48:54,531 INFO L137 encePairwiseOnDemand]: 352/360 looper letters, 265 selfloop transitions, 22 changer transitions 1/292 dead transitions. [2022-12-13 21:48:54,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 292 transitions, 3058 flow [2022-12-13 21:48:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:48:54,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:48:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 948 transitions. [2022-12-13 21:48:54,533 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2022-12-13 21:48:54,533 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 948 transitions. [2022-12-13 21:48:54,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 948 transitions. [2022-12-13 21:48:54,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:48:54,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 948 transitions. [2022-12-13 21:48:54,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 135.42857142857142) internal successors, (948), 7 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:54,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 360.0) internal successors, (2880), 8 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:54,537 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 360.0) internal successors, (2880), 8 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:54,537 INFO L175 Difference]: Start difference. First operand has 140 places, 156 transitions, 1600 flow. Second operand 7 states and 948 transitions. [2022-12-13 21:48:54,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 292 transitions, 3058 flow [2022-12-13 21:48:58,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 292 transitions, 2999 flow, removed 1 selfloop flow, removed 8 redundant places. [2022-12-13 21:48:58,307 INFO L231 Difference]: Finished difference. Result has 139 places, 156 transitions, 1623 flow [2022-12-13 21:48:58,307 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1623, PETRI_PLACES=139, PETRI_TRANSITIONS=156} [2022-12-13 21:48:58,307 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2022-12-13 21:48:58,307 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 156 transitions, 1623 flow [2022-12-13 21:48:58,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 120.36842105263158) internal successors, (2287), 19 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:58,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:48:58,308 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:48:58,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 21:48:58,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:48:58,510 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:48:58,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:48:58,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1699431480, now seen corresponding path program 1 times [2022-12-13 21:48:58,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:48:58,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48572451] [2022-12-13 21:48:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:48:58,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:48:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:48:58,750 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 21:48:58,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:48:58,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48572451] [2022-12-13 21:48:58,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48572451] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:48:58,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997750547] [2022-12-13 21:48:58,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:48:58,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:48:58,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:48:58,751 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:48:58,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 21:48:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:48:58,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 21:48:58,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:48:58,878 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 21:48:58,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:48:58,903 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 21:48:58,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:48:58,941 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 21:48:58,968 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 21:48:58,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:48:58,999 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_813 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_813) c_~A~0.base) (+ c_~A~0.offset 4 (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) 9223372039002259456))) is different from false [2022-12-13 21:48:59,003 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_813 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_813) c_~A~0.base) (+ c_~A~0.offset 4)) 9223372039002259456))) is different from false [2022-12-13 21:48:59,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:48:59,048 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 21:48:59,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:48:59,053 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 21:48:59,057 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 21:48:59,061 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 21:48:59,132 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 21:48:59,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997750547] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:48:59,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:48:59,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-12-13 21:48:59,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241052643] [2022-12-13 21:48:59,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:48:59,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 21:48:59,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:48:59,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 21:48:59,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=8, NotChecked=78, Total=506 [2022-12-13 21:48:59,208 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 360 [2022-12-13 21:48:59,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 156 transitions, 1623 flow. Second operand has 23 states, 23 states have (on average 123.17391304347827) internal successors, (2833), 23 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:48:59,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:48:59,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 360 [2022-12-13 21:48:59,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:49:22,385 INFO L130 PetriNetUnfolder]: 123847/182400 cut-off events. [2022-12-13 21:49:22,385 INFO L131 PetriNetUnfolder]: For 939562/939673 co-relation queries the response was YES. [2022-12-13 21:49:23,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736786 conditions, 182400 events. 123847/182400 cut-off events. For 939562/939673 co-relation queries the response was YES. Maximal size of possible extension queue 12525. Compared 1619819 event pairs, 46163 based on Foata normal form. 150/127713 useless extension candidates. Maximal degree in co-relation 736737. Up to 133444 conditions per place. [2022-12-13 21:49:23,913 INFO L137 encePairwiseOnDemand]: 351/360 looper letters, 335 selfloop transitions, 68 changer transitions 1/408 dead transitions. [2022-12-13 21:49:23,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 408 transitions, 4224 flow [2022-12-13 21:49:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 21:49:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 21:49:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1668 transitions. [2022-12-13 21:49:23,916 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2022-12-13 21:49:23,916 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1668 transitions. [2022-12-13 21:49:23,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1668 transitions. [2022-12-13 21:49:23,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:49:23,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1668 transitions. [2022-12-13 21:49:23,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 139.0) internal successors, (1668), 12 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:23,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 360.0) internal successors, (4680), 13 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:23,922 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 360.0) internal successors, (4680), 13 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:23,922 INFO L175 Difference]: Start difference. First operand has 139 places, 156 transitions, 1623 flow. Second operand 12 states and 1668 transitions. [2022-12-13 21:49:23,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 408 transitions, 4224 flow [2022-12-13 21:49:28,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 408 transitions, 4197 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-12-13 21:49:28,884 INFO L231 Difference]: Finished difference. Result has 148 places, 178 transitions, 2067 flow [2022-12-13 21:49:28,885 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=1596, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2067, PETRI_PLACES=148, PETRI_TRANSITIONS=178} [2022-12-13 21:49:28,885 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2022-12-13 21:49:28,885 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 178 transitions, 2067 flow [2022-12-13 21:49:28,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 123.17391304347827) internal successors, (2833), 23 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:28,885 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:49:28,885 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:49:28,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 21:49:29,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:49:29,087 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:49:29,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:49:29,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1940458468, now seen corresponding path program 1 times [2022-12-13 21:49:29,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:49:29,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837771046] [2022-12-13 21:49:29,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:49:29,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:49:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:49:29,148 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 21:49:29,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:49:29,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837771046] [2022-12-13 21:49:29,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837771046] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:49:29,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:49:29,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:49:29,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035622926] [2022-12-13 21:49:29,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:49:29,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:49:29,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:49:29,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:49:29,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:49:29,197 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 360 [2022-12-13 21:49:29,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 178 transitions, 2067 flow. Second operand has 5 states, 5 states have (on average 143.8) internal successors, (719), 5 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:29,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:49:29,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 360 [2022-12-13 21:49:29,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:49:49,948 INFO L130 PetriNetUnfolder]: 114741/174785 cut-off events. [2022-12-13 21:49:49,948 INFO L131 PetriNetUnfolder]: For 848970/849388 co-relation queries the response was YES. [2022-12-13 21:49:50,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711285 conditions, 174785 events. 114741/174785 cut-off events. For 848970/849388 co-relation queries the response was YES. Maximal size of possible extension queue 9044. Compared 1547849 event pairs, 72018 based on Foata normal form. 415/129974 useless extension candidates. Maximal degree in co-relation 711234. Up to 156264 conditions per place. [2022-12-13 21:49:51,465 INFO L137 encePairwiseOnDemand]: 352/360 looper letters, 192 selfloop transitions, 3 changer transitions 26/229 dead transitions. [2022-12-13 21:49:51,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 229 transitions, 2853 flow [2022-12-13 21:49:51,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:49:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 21:49:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 934 transitions. [2022-12-13 21:49:51,467 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4324074074074074 [2022-12-13 21:49:51,467 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 934 transitions. [2022-12-13 21:49:51,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 934 transitions. [2022-12-13 21:49:51,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:49:51,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 934 transitions. [2022-12-13 21:49:51,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.66666666666666) internal successors, (934), 6 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:51,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:51,470 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:49:51,470 INFO L175 Difference]: Start difference. First operand has 148 places, 178 transitions, 2067 flow. Second operand 6 states and 934 transitions. [2022-12-13 21:49:51,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 229 transitions, 2853 flow [2022-12-13 21:50:00,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 229 transitions, 2827 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-12-13 21:50:00,355 INFO L231 Difference]: Finished difference. Result has 152 places, 172 transitions, 2029 flow [2022-12-13 21:50:00,355 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=2048, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2029, PETRI_PLACES=152, PETRI_TRANSITIONS=172} [2022-12-13 21:50:00,355 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 96 predicate places. [2022-12-13 21:50:00,355 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 172 transitions, 2029 flow [2022-12-13 21:50:00,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.8) internal successors, (719), 5 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:50:00,355 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:50:00,356 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:50:00,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 21:50:00,356 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:50:00,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:50:00,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1710706983, now seen corresponding path program 1 times [2022-12-13 21:50:00,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:50:00,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043353405] [2022-12-13 21:50:00,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:50:00,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:50:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:50:00,552 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 21:50:00,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:50:00,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043353405] [2022-12-13 21:50:00,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043353405] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:50:00,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198967534] [2022-12-13 21:50:00,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:50:00,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:50:00,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:50:00,554 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:50:00,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 21:50:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:50:00,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 21:50:00,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:50:00,690 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 21:50:00,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:50:00,724 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 21:50:00,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:50:00,755 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 14 treesize of output 16 [2022-12-13 21:50:00,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:50:00,798 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 21:50:00,814 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 21:50:00,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:50:00,830 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_882 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_882) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) 4294967296)) is different from false [2022-12-13 21:50:00,836 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_882 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_882) c_~A~0.base) c_~A~0.offset) 4294967296)) is different from false [2022-12-13 21:50:00,871 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_881 (Array Int Int)) (v_ArrVal_880 (Array Int Int)) (v_ArrVal_882 (Array Int Int))) (< (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_880) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_881) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_882) |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 21:50:00,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:50:00,879 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 21:50:00,886 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:50:00,887 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 245 treesize of output 239 [2022-12-13 21:50:00,893 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 21:50:00,898 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 222 treesize of output 206 [2022-12-13 21:50:00,902 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 206 treesize of output 198 [2022-12-13 21:50:01,050 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 21:50:01,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198967534] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:50:01,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:50:01,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-12-13 21:50:01,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724060734] [2022-12-13 21:50:01,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:50:01,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 21:50:01,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:50:01,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 21:50:01,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=220, Unknown=5, NotChecked=96, Total=380 [2022-12-13 21:50:01,102 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 360 [2022-12-13 21:50:01,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 172 transitions, 2029 flow. Second operand has 20 states, 20 states have (on average 120.35) internal successors, (2407), 20 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:50:01,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:50:01,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 360 [2022-12-13 21:50:01,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:50:23,492 INFO L130 PetriNetUnfolder]: 119423/175630 cut-off events. [2022-12-13 21:50:23,492 INFO L131 PetriNetUnfolder]: For 848633/848794 co-relation queries the response was YES. [2022-12-13 21:50:24,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 732509 conditions, 175630 events. 119423/175630 cut-off events. For 848633/848794 co-relation queries the response was YES. Maximal size of possible extension queue 12491. Compared 1553851 event pairs, 57874 based on Foata normal form. 2209/131723 useless extension candidates. Maximal degree in co-relation 732455. Up to 111447 conditions per place. [2022-12-13 21:50:24,954 INFO L137 encePairwiseOnDemand]: 352/360 looper letters, 260 selfloop transitions, 22 changer transitions 0/285 dead transitions. [2022-12-13 21:50:24,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 285 transitions, 3378 flow [2022-12-13 21:50:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:50:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:50:24,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 924 transitions. [2022-12-13 21:50:24,956 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2022-12-13 21:50:24,956 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 924 transitions. [2022-12-13 21:50:24,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 924 transitions. [2022-12-13 21:50:24,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:50:24,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 924 transitions. [2022-12-13 21:50:24,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 132.0) internal successors, (924), 7 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:50:24,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 360.0) internal successors, (2880), 8 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:50:24,959 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 360.0) internal successors, (2880), 8 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:50:24,959 INFO L175 Difference]: Start difference. First operand has 152 places, 172 transitions, 2029 flow. Second operand 7 states and 924 transitions. [2022-12-13 21:50:24,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 285 transitions, 3378 flow [2022-12-13 21:50:42,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 285 transitions, 3165 flow, removed 59 selfloop flow, removed 11 redundant places. [2022-12-13 21:50:42,641 INFO L231 Difference]: Finished difference. Result has 137 places, 170 transitions, 1891 flow [2022-12-13 21:50:42,641 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=1847, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1891, PETRI_PLACES=137, PETRI_TRANSITIONS=170} [2022-12-13 21:50:42,641 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2022-12-13 21:50:42,641 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 170 transitions, 1891 flow [2022-12-13 21:50:42,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 120.35) internal successors, (2407), 20 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:50:42,641 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:50:42,641 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:50:42,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 21:50:42,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 21:50:42,842 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:50:42,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:50:42,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1712572239, now seen corresponding path program 1 times [2022-12-13 21:50:42,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:50:42,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096448943] [2022-12-13 21:50:42,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:50:42,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:50:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:50:43,058 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 21:50:43,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:50:43,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096448943] [2022-12-13 21:50:43,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096448943] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:50:43,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533792480] [2022-12-13 21:50:43,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:50:43,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:50:43,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:50:43,059 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:50:43,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 21:50:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:50:43,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 21:50:43,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:50:43,180 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 21:50:43,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:50:43,201 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 21:50:43,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:50:43,221 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 21:50:43,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:50:43,257 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 21:50:43,264 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 21:50:43,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:50:43,309 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_931 (Array Int Int)) (v_ArrVal_930 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_930) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_931) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2022-12-13 21:50:43,315 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_931 (Array Int Int)) (v_ArrVal_930 (Array Int Int)) (v_ArrVal_929 (Array Int Int))) (< 0 (+ (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_929) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_930) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_931) |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 21:50:43,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:50:43,321 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 30 treesize of output 31 [2022-12-13 21:50:43,326 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:50:43,326 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 279 treesize of output 273 [2022-12-13 21:50:43,329 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 258 treesize of output 242 [2022-12-13 21:50:43,332 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 242 treesize of output 234 [2022-12-13 21:50:43,336 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 234 treesize of output 230 [2022-12-13 21:50:43,457 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 21:50:43,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533792480] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:50:43,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:50:43,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-12-13 21:50:43,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558069793] [2022-12-13 21:50:43,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:50:43,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 21:50:43,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:50:43,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 21:50:43,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=8, NotChecked=62, Total=342 [2022-12-13 21:50:43,508 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 360 [2022-12-13 21:50:43,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 170 transitions, 1891 flow. Second operand has 19 states, 19 states have (on average 120.36842105263158) internal successors, (2287), 19 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:50:43,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:50:43,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 360 [2022-12-13 21:50:43,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:10,505 INFO L130 PetriNetUnfolder]: 144422/216219 cut-off events. [2022-12-13 21:51:10,506 INFO L131 PetriNetUnfolder]: For 797510/797547 co-relation queries the response was YES. [2022-12-13 21:51:11,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 817348 conditions, 216219 events. 144422/216219 cut-off events. For 797510/797547 co-relation queries the response was YES. Maximal size of possible extension queue 14801. Compared 1998700 event pairs, 61260 based on Foata normal form. 9207/162870 useless extension candidates. Maximal degree in co-relation 817303. Up to 99830 conditions per place. [2022-12-13 21:51:12,520 INFO L137 encePairwiseOnDemand]: 348/360 looper letters, 219 selfloop transitions, 32 changer transitions 0/258 dead transitions. [2022-12-13 21:51:12,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 258 transitions, 3161 flow [2022-12-13 21:51:12,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:51:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:51:12,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 920 transitions. [2022-12-13 21:51:12,522 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2022-12-13 21:51:12,522 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 920 transitions. [2022-12-13 21:51:12,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 920 transitions. [2022-12-13 21:51:12,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:12,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 920 transitions. [2022-12-13 21:51:12,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 131.42857142857142) internal successors, (920), 7 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:12,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 360.0) internal successors, (2880), 8 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:12,526 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 360.0) internal successors, (2880), 8 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:12,526 INFO L175 Difference]: Start difference. First operand has 137 places, 170 transitions, 1891 flow. Second operand 7 states and 920 transitions. [2022-12-13 21:51:12,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 258 transitions, 3161 flow [2022-12-13 21:51:15,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 258 transitions, 3093 flow, removed 4 selfloop flow, removed 6 redundant places. [2022-12-13 21:51:15,176 INFO L231 Difference]: Finished difference. Result has 139 places, 180 transitions, 2071 flow [2022-12-13 21:51:15,176 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=1827, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2071, PETRI_PLACES=139, PETRI_TRANSITIONS=180} [2022-12-13 21:51:15,176 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2022-12-13 21:51:15,176 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 180 transitions, 2071 flow [2022-12-13 21:51:15,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 120.36842105263158) internal successors, (2287), 19 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:15,177 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:15,177 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-12-13 21:51:15,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 21:51:15,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 21:51:15,379 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:51:15,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:15,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1699439168, now seen corresponding path program 2 times [2022-12-13 21:51:15,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:15,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309087136] [2022-12-13 21:51:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:15,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:51:15,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:15,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309087136] [2022-12-13 21:51:15,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309087136] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:15,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381862738] [2022-12-13 21:51:15,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:51:15,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:15,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:15,475 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:15,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 21:51:15,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:51:15,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:51:15,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 21:51:15,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:51:15,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:51:15,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381862738] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:51:15,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:51:15,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 21:51:15,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48085752] [2022-12-13 21:51:15,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:51:15,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 21:51:15,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:15,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 21:51:15,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-12-13 21:51:15,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 360 [2022-12-13 21:51:15,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 180 transitions, 2071 flow. Second operand has 19 states, 19 states have (on average 142.21052631578948) internal successors, (2702), 19 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:15,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:15,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 360 [2022-12-13 21:51:15,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:51:37,760 INFO L130 PetriNetUnfolder]: 117842/175934 cut-off events. [2022-12-13 21:51:37,760 INFO L131 PetriNetUnfolder]: For 778811/779018 co-relation queries the response was YES. [2022-12-13 21:51:38,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708099 conditions, 175934 events. 117842/175934 cut-off events. For 778811/779018 co-relation queries the response was YES. Maximal size of possible extension queue 11384. Compared 1589232 event pairs, 49400 based on Foata normal form. 2202/127265 useless extension candidates. Maximal degree in co-relation 708054. Up to 91820 conditions per place. [2022-12-13 21:51:39,192 INFO L137 encePairwiseOnDemand]: 352/360 looper letters, 1046 selfloop transitions, 26 changer transitions 0/1075 dead transitions. [2022-12-13 21:51:39,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 1075 transitions, 12354 flow [2022-12-13 21:51:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 21:51:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 21:51:39,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2752 transitions. [2022-12-13 21:51:39,196 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4496732026143791 [2022-12-13 21:51:39,196 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2752 transitions. [2022-12-13 21:51:39,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2752 transitions. [2022-12-13 21:51:39,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:51:39,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2752 transitions. [2022-12-13 21:51:39,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 161.88235294117646) internal successors, (2752), 17 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:39,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 360.0) internal successors, (6480), 18 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:39,203 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 360.0) internal successors, (6480), 18 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:39,203 INFO L175 Difference]: Start difference. First operand has 139 places, 180 transitions, 2071 flow. Second operand 17 states and 2752 transitions. [2022-12-13 21:51:39,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 1075 transitions, 12354 flow [2022-12-13 21:51:40,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 1075 transitions, 12347 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 21:51:40,614 INFO L231 Difference]: Finished difference. Result has 157 places, 193 transitions, 2363 flow [2022-12-13 21:51:40,614 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2363, PETRI_PLACES=157, PETRI_TRANSITIONS=193} [2022-12-13 21:51:40,614 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 101 predicate places. [2022-12-13 21:51:40,614 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 193 transitions, 2363 flow [2022-12-13 21:51:40,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 142.21052631578948) internal successors, (2702), 19 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:40,615 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:51:40,615 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:51:40,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 21:51:40,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 21:51:40,816 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:51:40,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:51:40,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1712747080, now seen corresponding path program 1 times [2022-12-13 21:51:40,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:51:40,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360326167] [2022-12-13 21:51:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:40,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:51:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:41,019 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 21:51:41,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:51:41,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360326167] [2022-12-13 21:51:41,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360326167] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:51:41,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952090851] [2022-12-13 21:51:41,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:51:41,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:51:41,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:51:41,020 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:51:41,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 21:51:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:51:41,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 21:51:41,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:51:41,179 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 21:51:41,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:51:41,204 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 21:51:41,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:51:41,228 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 21:51:41,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:51:41,252 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 21:51:41,267 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 21:51:41,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:51:41,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:51:41,363 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-12-13 21:51:41,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:51:41,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1953 treesize of output 1891 [2022-12-13 21:51:41,383 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 1878 treesize of output 1814 [2022-12-13 21:51:41,394 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 1814 treesize of output 1686 [2022-12-13 21:51:41,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1686 treesize of output 1654 [2022-12-13 21:51:43,818 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 21:51:43,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952090851] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:51:43,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:51:43,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-12-13 21:51:43,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181710784] [2022-12-13 21:51:43,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:51:43,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 21:51:43,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:51:43,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 21:51:43,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=233, Unknown=10, NotChecked=0, Total=306 [2022-12-13 21:51:43,959 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 360 [2022-12-13 21:51:43,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 193 transitions, 2363 flow. Second operand has 18 states, 18 states have (on average 120.38888888888889) internal successors, (2167), 18 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:51:43,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:51:43,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 360 [2022-12-13 21:51:43,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:52:05,389 INFO L130 PetriNetUnfolder]: 111613/167367 cut-off events. [2022-12-13 21:52:05,390 INFO L131 PetriNetUnfolder]: For 766947/767154 co-relation queries the response was YES. [2022-12-13 21:52:06,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700259 conditions, 167367 events. 111613/167367 cut-off events. For 766947/767154 co-relation queries the response was YES. Maximal size of possible extension queue 11044. Compared 1508780 event pairs, 44686 based on Foata normal form. 2683/121165 useless extension candidates. Maximal degree in co-relation 700209. Up to 80986 conditions per place. [2022-12-13 21:52:06,878 INFO L137 encePairwiseOnDemand]: 350/360 looper letters, 241 selfloop transitions, 33 changer transitions 0/284 dead transitions. [2022-12-13 21:52:06,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 284 transitions, 3793 flow [2022-12-13 21:52:06,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:52:06,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:52:06,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 917 transitions. [2022-12-13 21:52:06,880 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3638888888888889 [2022-12-13 21:52:06,880 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 917 transitions. [2022-12-13 21:52:06,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 917 transitions. [2022-12-13 21:52:06,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:52:06,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 917 transitions. [2022-12-13 21:52:06,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 131.0) internal successors, (917), 7 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:52:06,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 360.0) internal successors, (2880), 8 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:52:06,883 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 360.0) internal successors, (2880), 8 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:52:06,883 INFO L175 Difference]: Start difference. First operand has 157 places, 193 transitions, 2363 flow. Second operand 7 states and 917 transitions. [2022-12-13 21:52:06,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 284 transitions, 3793 flow [2022-12-13 21:52:08,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 284 transitions, 3732 flow, removed 15 selfloop flow, removed 6 redundant places. [2022-12-13 21:52:08,897 INFO L231 Difference]: Finished difference. Result has 157 places, 192 transitions, 2387 flow [2022-12-13 21:52:08,897 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=2321, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2387, PETRI_PLACES=157, PETRI_TRANSITIONS=192} [2022-12-13 21:52:08,897 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 101 predicate places. [2022-12-13 21:52:08,897 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 192 transitions, 2387 flow [2022-12-13 21:52:08,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 120.38888888888889) internal successors, (2167), 18 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:52:08,897 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:52:08,898 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:52:08,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 21:52:09,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:52:09,099 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:52:09,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:52:09,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1699438921, now seen corresponding path program 1 times [2022-12-13 21:52:09,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:52:09,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603950343] [2022-12-13 21:52:09,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:52:09,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:52:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:52:09,353 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 21:52:09,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:52:09,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603950343] [2022-12-13 21:52:09,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603950343] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:52:09,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148731474] [2022-12-13 21:52:09,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:52:09,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:52:09,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:52:09,355 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:52:09,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 21:52:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:52:09,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 21:52:09,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:52:09,534 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 21:52:09,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:52:09,552 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 21:52:09,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:52:09,598 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 21:52:09,616 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 21:52:09,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:52:09,666 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1068 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1068) c_~A~0.base) (+ c_~A~0.offset 4 (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) 4294967296)) is different from false [2022-12-13 21:52:09,670 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1068 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1068) c_~A~0.base) (+ c_~A~0.offset 4)) 4294967296)) is different from false [2022-12-13 21:52:09,715 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:52:09,715 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 21:52:09,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:52:09,722 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 21:52:09,726 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 21:52:09,729 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 110 treesize of output 94 [2022-12-13 21:52:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 21:52:09,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148731474] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:52:09,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:52:09,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-12-13 21:52:09,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126504700] [2022-12-13 21:52:09,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:52:09,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 21:52:09,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:52:09,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 21:52:09,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=359, Unknown=9, NotChecked=78, Total=506 [2022-12-13 21:52:09,879 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 360 [2022-12-13 21:52:09,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 192 transitions, 2387 flow. Second operand has 23 states, 23 states have (on average 123.17391304347827) internal successors, (2833), 23 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:52:09,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:52:09,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 360 [2022-12-13 21:52:09,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:52:31,871 INFO L130 PetriNetUnfolder]: 109212/162969 cut-off events. [2022-12-13 21:52:31,871 INFO L131 PetriNetUnfolder]: For 891622/892129 co-relation queries the response was YES. [2022-12-13 21:52:32,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 705536 conditions, 162969 events. 109212/162969 cut-off events. For 891622/892129 co-relation queries the response was YES. Maximal size of possible extension queue 9848. Compared 1442270 event pairs, 46079 based on Foata normal form. 546/116425 useless extension candidates. Maximal degree in co-relation 705485. Up to 123717 conditions per place. [2022-12-13 21:52:33,295 INFO L137 encePairwiseOnDemand]: 351/360 looper letters, 299 selfloop transitions, 68 changer transitions 0/370 dead transitions. [2022-12-13 21:52:33,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 370 transitions, 4728 flow [2022-12-13 21:52:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 21:52:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 21:52:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1501 transitions. [2022-12-13 21:52:33,298 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37904040404040407 [2022-12-13 21:52:33,298 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1501 transitions. [2022-12-13 21:52:33,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1501 transitions. [2022-12-13 21:52:33,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:52:33,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1501 transitions. [2022-12-13 21:52:33,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 136.45454545454547) internal successors, (1501), 11 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:52:33,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 360.0) internal successors, (4320), 12 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:52:33,302 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 360.0) internal successors, (4320), 12 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:52:33,302 INFO L175 Difference]: Start difference. First operand has 157 places, 192 transitions, 2387 flow. Second operand 11 states and 1501 transitions. [2022-12-13 21:52:33,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 370 transitions, 4728 flow [2022-12-13 21:52:35,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 370 transitions, 4626 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-12-13 21:52:35,779 INFO L231 Difference]: Finished difference. Result has 161 places, 186 transitions, 2352 flow [2022-12-13 21:52:35,779 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=2216, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2352, PETRI_PLACES=161, PETRI_TRANSITIONS=186} [2022-12-13 21:52:35,779 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 105 predicate places. [2022-12-13 21:52:35,779 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 186 transitions, 2352 flow [2022-12-13 21:52:35,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 123.17391304347827) internal successors, (2833), 23 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:52:35,780 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:52:35,780 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:52:35,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 21:52:35,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 21:52:35,981 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:52:35,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:52:35,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1555594454, now seen corresponding path program 1 times [2022-12-13 21:52:35,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:52:35,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826603828] [2022-12-13 21:52:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:52:35,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:52:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:52:36,203 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 21:52:36,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:52:36,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826603828] [2022-12-13 21:52:36,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826603828] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:52:36,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15121214] [2022-12-13 21:52:36,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:52:36,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:52:36,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:52:36,204 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:52:36,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 21:52:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:52:36,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 21:52:36,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:52:36,361 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 21:52:36,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:52:36,411 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 21:52:36,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:52:36,460 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 21:52:36,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:52:36,509 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 21:52:36,563 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 21:52:36,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:52:36,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:52:36,779 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 34 treesize of output 35 [2022-12-13 21:52:36,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:52:36,789 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 343 treesize of output 331 [2022-12-13 21:52:36,795 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 314 treesize of output 266 [2022-12-13 21:52:36,800 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 266 treesize of output 242 [2022-12-13 21:52:36,805 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 242 treesize of output 230 [2022-12-13 21:52:36,986 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 21:52:36,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15121214] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:52:36,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:52:36,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-12-13 21:52:36,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103612888] [2022-12-13 21:52:36,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:52:36,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 21:52:36,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:52:36,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 21:52:36,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=313, Unknown=4, NotChecked=0, Total=380 [2022-12-13 21:52:37,415 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 360 [2022-12-13 21:52:37,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 186 transitions, 2352 flow. Second operand has 20 states, 20 states have (on average 106.5) internal successors, (2130), 20 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:52:37,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:52:37,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 360 [2022-12-13 21:52:37,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:52:39,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 21:52:42,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 21:52:44,045 WARN L539 Checker$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 21:53:06,629 INFO L130 PetriNetUnfolder]: 110161/169385 cut-off events. [2022-12-13 21:53:06,629 INFO L131 PetriNetUnfolder]: For 918796/919364 co-relation queries the response was YES. [2022-12-13 21:53:07,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 741785 conditions, 169385 events. 110161/169385 cut-off events. For 918796/919364 co-relation queries the response was YES. Maximal size of possible extension queue 8369. Compared 1528908 event pairs, 20098 based on Foata normal form. 568/127002 useless extension candidates. Maximal degree in co-relation 741735. Up to 92508 conditions per place. [2022-12-13 21:53:08,199 INFO L137 encePairwiseOnDemand]: 343/360 looper letters, 385 selfloop transitions, 57 changer transitions 0/453 dead transitions. [2022-12-13 21:53:08,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 453 transitions, 5771 flow [2022-12-13 21:53:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 21:53:08,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 21:53:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1547 transitions. [2022-12-13 21:53:08,202 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33055555555555555 [2022-12-13 21:53:08,202 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1547 transitions. [2022-12-13 21:53:08,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1547 transitions. [2022-12-13 21:53:08,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:53:08,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1547 transitions. [2022-12-13 21:53:08,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 119.0) internal successors, (1547), 13 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:53:08,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 360.0) internal successors, (5040), 14 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:53:08,207 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 360.0) internal successors, (5040), 14 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:53:08,207 INFO L175 Difference]: Start difference. First operand has 161 places, 186 transitions, 2352 flow. Second operand 13 states and 1547 transitions. [2022-12-13 21:53:08,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 453 transitions, 5771 flow [2022-12-13 21:53:10,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 453 transitions, 5605 flow, removed 1 selfloop flow, removed 8 redundant places. [2022-12-13 21:53:10,661 INFO L231 Difference]: Finished difference. Result has 172 places, 237 transitions, 2981 flow [2022-12-13 21:53:10,661 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=2223, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2981, PETRI_PLACES=172, PETRI_TRANSITIONS=237} [2022-12-13 21:53:10,661 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 116 predicate places. [2022-12-13 21:53:10,661 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 237 transitions, 2981 flow [2022-12-13 21:53:10,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.5) internal successors, (2130), 20 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:53:10,662 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:53:10,662 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2022-12-13 21:53:10,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 21:53:10,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:53:10,864 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:53:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:53:10,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1314575154, now seen corresponding path program 3 times [2022-12-13 21:53:10,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:53:10,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373554114] [2022-12-13 21:53:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:53:10,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:53:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:53:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:53:11,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:53:11,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373554114] [2022-12-13 21:53:11,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373554114] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:53:11,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771672163] [2022-12-13 21:53:11,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:53:11,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:53:11,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:53:11,121 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:53:11,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 21:53:11,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 21:53:11,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:53:11,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 21:53:11,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:53:11,309 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 21:53:11,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:53:11,334 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 21:53:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:53:11,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:53:11,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:53:11,449 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 21:53:11,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:53:11,454 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 21:53:11,456 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 21:53:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:53:11,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771672163] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:53:11,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:53:11,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-12-13 21:53:11,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409294922] [2022-12-13 21:53:11,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:53:11,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 21:53:11,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:53:11,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 21:53:11,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=474, Unknown=7, NotChecked=0, Total=552 [2022-12-13 21:53:11,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 360 [2022-12-13 21:53:11,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 237 transitions, 2981 flow. Second operand has 24 states, 24 states have (on average 129.16666666666666) internal successors, (3100), 24 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:53:11,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:53:11,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 360 [2022-12-13 21:53:11,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:53:38,690 INFO L130 PetriNetUnfolder]: 118837/176949 cut-off events. [2022-12-13 21:53:38,690 INFO L131 PetriNetUnfolder]: For 1041176/1046406 co-relation queries the response was YES. [2022-12-13 21:53:39,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 881250 conditions, 176949 events. 118837/176949 cut-off events. For 1041176/1046406 co-relation queries the response was YES. Maximal size of possible extension queue 11649. Compared 1586382 event pairs, 61877 based on Foata normal form. 1547/145628 useless extension candidates. Maximal degree in co-relation 881193. Up to 102599 conditions per place. [2022-12-13 21:53:40,514 INFO L137 encePairwiseOnDemand]: 350/360 looper letters, 475 selfloop transitions, 34 changer transitions 0/514 dead transitions. [2022-12-13 21:53:40,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 514 transitions, 6748 flow [2022-12-13 21:53:40,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 21:53:40,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 21:53:40,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1957 transitions. [2022-12-13 21:53:40,517 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3882936507936508 [2022-12-13 21:53:40,517 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1957 transitions. [2022-12-13 21:53:40,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1957 transitions. [2022-12-13 21:53:40,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:53:40,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1957 transitions. [2022-12-13 21:53:40,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 139.78571428571428) internal successors, (1957), 14 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:53:40,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 360.0) internal successors, (5400), 15 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:53:40,523 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 360.0) internal successors, (5400), 15 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:53:40,523 INFO L175 Difference]: Start difference. First operand has 172 places, 237 transitions, 2981 flow. Second operand 14 states and 1957 transitions. [2022-12-13 21:53:40,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 514 transitions, 6748 flow [2022-12-13 21:53:44,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 514 transitions, 6732 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 21:53:44,235 INFO L231 Difference]: Finished difference. Result has 184 places, 242 transitions, 3107 flow [2022-12-13 21:53:44,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=2965, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3107, PETRI_PLACES=184, PETRI_TRANSITIONS=242} [2022-12-13 21:53:44,235 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 128 predicate places. [2022-12-13 21:53:44,235 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 242 transitions, 3107 flow [2022-12-13 21:53:44,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 129.16666666666666) internal successors, (3100), 24 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:53:44,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:53:44,236 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2022-12-13 21:53:44,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 21:53:44,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:53:44,437 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:53:44,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:53:44,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1314575155, now seen corresponding path program 2 times [2022-12-13 21:53:44,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:53:44,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945979109] [2022-12-13 21:53:44,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:53:44,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:53:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:53:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:53:44,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:53:44,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945979109] [2022-12-13 21:53:44,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945979109] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:53:44,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347356796] [2022-12-13 21:53:44,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:53:44,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:53:44,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:53:44,665 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:53:44,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 21:53:44,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:53:44,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:53:44,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 21:53:44,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:53:44,891 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 21:53:44,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:53:44,931 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 21:53:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:53:45,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:53:45,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:53:45,183 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 21:53:45,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:53:45,192 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 21:53:45,196 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 13 treesize of output 7 [2022-12-13 21:53:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:53:45,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347356796] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:53:45,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:53:45,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-12-13 21:53:45,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618647933] [2022-12-13 21:53:45,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:53:45,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 21:53:45,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:53:45,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 21:53:45,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-12-13 21:53:46,728 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 360 [2022-12-13 21:53:46,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 242 transitions, 3107 flow. Second operand has 26 states, 26 states have (on average 133.15384615384616) internal successors, (3462), 26 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:53:46,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:53:46,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 360 [2022-12-13 21:53:46,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:54:25,677 INFO L130 PetriNetUnfolder]: 154653/234468 cut-off events. [2022-12-13 21:54:25,677 INFO L131 PetriNetUnfolder]: For 1328984/1336994 co-relation queries the response was YES. [2022-12-13 21:54:27,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1141550 conditions, 234468 events. 154653/234468 cut-off events. For 1328984/1336994 co-relation queries the response was YES. Maximal size of possible extension queue 15186. Compared 2260054 event pairs, 53378 based on Foata normal form. 2499/192190 useless extension candidates. Maximal degree in co-relation 1141490. Up to 97038 conditions per place. [2022-12-13 21:54:28,192 INFO L137 encePairwiseOnDemand]: 349/360 looper letters, 821 selfloop transitions, 206 changer transitions 0/1032 dead transitions. [2022-12-13 21:54:28,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 1032 transitions, 13630 flow [2022-12-13 21:54:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 21:54:28,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-12-13 21:54:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 7532 transitions. [2022-12-13 21:54:28,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3874485596707819 [2022-12-13 21:54:28,200 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 7532 transitions. [2022-12-13 21:54:28,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 7532 transitions. [2022-12-13 21:54:28,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:54:28,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 7532 transitions. [2022-12-13 21:54:28,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 139.4814814814815) internal successors, (7532), 54 states have internal predecessors, (7532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:54:28,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 360.0) internal successors, (19800), 55 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 21:54:28,222 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 360.0) internal successors, (19800), 55 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 21:54:28,222 INFO L175 Difference]: Start difference. First operand has 184 places, 242 transitions, 3107 flow. Second operand 54 states and 7532 transitions. [2022-12-13 21:54:28,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 1032 transitions, 13630 flow [2022-12-13 21:54:34,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 1032 transitions, 13412 flow, removed 41 selfloop flow, removed 10 redundant places. [2022-12-13 21:54:34,886 INFO L231 Difference]: Finished difference. Result has 237 places, 404 transitions, 5843 flow [2022-12-13 21:54:34,886 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=2992, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=5843, PETRI_PLACES=237, PETRI_TRANSITIONS=404} [2022-12-13 21:54:34,887 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, 181 predicate places. [2022-12-13 21:54:34,887 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 404 transitions, 5843 flow [2022-12-13 21:54:34,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 133.15384615384616) internal successors, (3462), 26 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:54:34,887 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:54:34,887 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:54:34,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 21:54:35,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 21:54:35,089 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2022-12-13 21:54:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:54:35,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1555594455, now seen corresponding path program 1 times [2022-12-13 21:54:35,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:54:35,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616406779] [2022-12-13 21:54:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:54:35,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:54:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:54:35,328 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 21:54:35,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:54:35,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616406779] [2022-12-13 21:54:35,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616406779] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:54:35,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654593828] [2022-12-13 21:54:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:54:35,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:54:35,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:54:35,329 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:54:35,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b69470-3db9-4f5d-9df8-0b3afbaac486/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 21:54:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:54:35,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 21:54:35,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:54:35,488 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 21:54:35,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:54:35,527 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 14 treesize of output 16 [2022-12-13 21:54:35,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:54:35,579 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 21:54:35,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:54:35,624 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 21:54:35,678 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 21:54:35,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:54:35,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:54:35,872 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 32 treesize of output 33 [2022-12-13 21:54:35,883 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 21:54:35,883 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 617 treesize of output 589 [2022-12-13 21:54:35,892 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 574 treesize of output 526 [2022-12-13 21:54:35,899 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 526 treesize of output 430 [2022-12-13 21:54:35,906 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 430 treesize of output 406 [2022-12-13 21:54:36,678 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 21:54:36,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654593828] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:54:36,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:54:36,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-12-13 21:54:36,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882230757] [2022-12-13 21:54:36,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:54:36,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 21:54:36,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:54:36,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 21:54:36,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=306, Unknown=4, NotChecked=0, Total=380 [2022-12-13 21:54:37,189 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 360 [2022-12-13 21:54:37,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 404 transitions, 5843 flow. Second operand has 20 states, 20 states have (on average 106.5) internal successors, (2130), 20 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:54:37,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:54:37,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 360 [2022-12-13 21:54:37,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:54:39,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 21:54:41,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]