./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a 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_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 --- 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-38b53e6 [2022-11-25 23:47:14,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:47:14,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:47:14,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:47:14,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:47:14,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:47:14,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:47:14,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:47:14,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:47:14,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:47:14,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:47:14,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:47:14,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:47:14,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:47:14,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:47:14,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:47:14,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:47:14,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:47:14,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:47:14,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:47:14,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:47:14,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:47:14,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:47:14,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:47:14,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:47:14,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:47:14,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:47:14,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:47:14,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:47:14,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:47:14,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:47:14,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:47:14,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:47:14,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:47:14,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:47:14,531 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:47:14,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:47:14,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:47:14,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:47:14,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:47:14,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:47:14,536 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-25 23:47:14,577 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:47:14,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:47:14,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:47:14,578 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:47:14,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:47:14,579 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:47:14,579 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:47:14,579 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:47:14,580 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:47:14,580 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:47:14,581 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:47:14,581 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:47:14,581 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:47:14,581 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:47:14,582 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:47:14,582 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:47:14,582 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:47:14,582 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:47:14,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:47:14,583 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:47:14,584 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:47:14,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:47:14,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:47:14,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:47:14,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:47:14,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:47:14,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:47:14,585 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 23:47:14,585 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:47:14,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:47:14,586 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:47:14,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:47:14,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:47:14,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:47:14,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:47:14,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:47:14,587 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:47:14,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:47:14,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:47:14,588 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:47:14,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:47:14,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:47:14,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:47:14,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 [2022-11-25 23:47:14,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:47:14,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:47:14,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:47:14,944 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:47:14,944 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:47:14,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2022-11-25 23:47:18,031 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:47:18,276 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:47:18,277 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2022-11-25 23:47:18,290 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/data/325ce8563/cd5c17d9b51a42dfb9837904c3f30c49/FLAGa9fa5c816 [2022-11-25 23:47:18,305 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/data/325ce8563/cd5c17d9b51a42dfb9837904c3f30c49 [2022-11-25 23:47:18,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:47:18,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:47:18,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:47:18,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:47:18,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:47:18,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:47:18" (1/1) ... [2022-11-25 23:47:18,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b6723c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:18, skipping insertion in model container [2022-11-25 23:47:18,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:47:18" (1/1) ... [2022-11-25 23:47:18,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:47:18,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:47:18,507 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,508 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,508 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,513 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,514 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,514 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,515 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,516 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,519 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,520 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,521 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,524 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,524 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,525 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,525 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,526 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,527 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,528 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,528 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,530 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,530 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,531 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,532 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,533 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,534 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,535 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,535 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,536 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,546 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_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2022-11-25 23:47:18,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:47:18,564 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:47:18,579 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,580 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,580 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,582 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,582 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,585 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,585 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,586 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,587 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,587 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,588 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,590 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,590 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,591 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,591 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,592 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,593 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,594 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,594 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,595 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,596 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,596 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,597 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,598 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,598 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,600 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,600 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:18,601 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:18,607 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_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2022-11-25 23:47:18,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:47:18,628 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:47:18,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:18 WrapperNode [2022-11-25 23:47:18,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:47:18,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:47:18,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:47:18,631 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:47:18,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:18" (1/1) ... [2022-11-25 23:47:18,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:18" (1/1) ... [2022-11-25 23:47:18,684 INFO L138 Inliner]: procedures = 27, calls = 87, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 398 [2022-11-25 23:47:18,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:47:18,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:47:18,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:47:18,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:47:18,695 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:18" (1/1) ... [2022-11-25 23:47:18,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:18" (1/1) ... [2022-11-25 23:47:18,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:18" (1/1) ... [2022-11-25 23:47:18,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:18" (1/1) ... [2022-11-25 23:47:18,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:18" (1/1) ... [2022-11-25 23:47:18,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:18" (1/1) ... [2022-11-25 23:47:18,722 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:18" (1/1) ... [2022-11-25 23:47:18,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:18" (1/1) ... [2022-11-25 23:47:18,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:47:18,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:47:18,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:47:18,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:47:18,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:18" (1/1) ... [2022-11-25 23:47:18,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:47:18,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:47:18,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:47:18,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:47:18,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:47:18,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:47:18,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:47:18,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:47:18,832 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 23:47:18,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 23:47:18,833 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 23:47:18,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 23:47:18,833 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 23:47:18,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 23:47:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-25 23:47:18,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-25 23:47:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:47:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 23:47:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 23:47:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:47:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:47:18,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:47:18,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:47:18,838 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 23:47:18,980 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:47:18,983 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:47:19,667 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:47:20,270 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:47:20,270 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-25 23:47:20,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:47:20 BoogieIcfgContainer [2022-11-25 23:47:20,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:47:20,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:47:20,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:47:20,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:47:20,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:47:18" (1/3) ... [2022-11-25 23:47:20,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c7e60e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:47:20, skipping insertion in model container [2022-11-25 23:47:20,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:18" (2/3) ... [2022-11-25 23:47:20,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c7e60e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:47:20, skipping insertion in model container [2022-11-25 23:47:20,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:47:20" (3/3) ... [2022-11-25 23:47:20,289 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2022-11-25 23:47:20,299 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 23:47:20,310 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:47:20,310 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-25 23:47:20,311 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 23:47:20,583 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 23:47:20,637 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 23:47:20,666 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 295 places, 304 transitions, 640 flow [2022-11-25 23:47:20,671 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 295 places, 304 transitions, 640 flow [2022-11-25 23:47:20,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 304 transitions, 640 flow [2022-11-25 23:47:20,856 INFO L130 PetriNetUnfolder]: 22/300 cut-off events. [2022-11-25 23:47:20,856 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 23:47:20,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 300 events. 22/300 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 303 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 254. Up to 2 conditions per place. [2022-11-25 23:47:20,871 INFO L119 LiptonReduction]: Number of co-enabled transitions 4644 [2022-11-25 23:47:44,381 INFO L134 LiptonReduction]: Checked pairs total: 10232 [2022-11-25 23:47:44,381 INFO L136 LiptonReduction]: Total number of compositions: 309 [2022-11-25 23:47:44,390 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 81 places, 75 transitions, 182 flow [2022-11-25 23:47:45,837 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 28331 states, 25491 states have (on average 4.875877760778314) internal successors, (124291), 28330 states have internal predecessors, (124291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:45,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:47:45,882 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=FINITE_AUTOMATA, 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;@1cf4e92b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:47:45,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2022-11-25 23:47:45,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 28331 states, 25491 states have (on average 4.875877760778314) internal successors, (124291), 28330 states have internal predecessors, (124291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:45,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 23:47:45,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:45,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 23:47:45,930 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:47:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash 52737, now seen corresponding path program 1 times [2022-11-25 23:47:45,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:45,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676003916] [2022-11-25 23:47:45,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:45,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:46,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:46,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676003916] [2022-11-25 23:47:46,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676003916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:47:46,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:47:46,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:47:46,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39612885] [2022-11-25 23:47:46,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:47:46,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:47:46,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:47:46,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:47:46,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:47:46,532 INFO L87 Difference]: Start difference. First operand has 28331 states, 25491 states have (on average 4.875877760778314) internal successors, (124291), 28330 states have internal predecessors, (124291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:47,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:47,585 INFO L93 Difference]: Finished difference Result 17939 states and 77919 transitions. [2022-11-25 23:47:47,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:47:47,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-25 23:47:47,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:47,914 INFO L225 Difference]: With dead ends: 17939 [2022-11-25 23:47:47,914 INFO L226 Difference]: Without dead ends: 17939 [2022-11-25 23:47:47,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:47:47,922 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:47,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 12 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:47:48,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17939 states. [2022-11-25 23:47:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17939 to 8976. [2022-11-25 23:47:48,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8976 states, 8539 states have (on average 4.563649139243471) internal successors, (38969), 8975 states have internal predecessors, (38969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:49,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8976 states to 8976 states and 38969 transitions. [2022-11-25 23:47:49,037 INFO L78 Accepts]: Start accepts. Automaton has 8976 states and 38969 transitions. Word has length 2 [2022-11-25 23:47:49,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:49,063 INFO L495 AbstractCegarLoop]: Abstraction has 8976 states and 38969 transitions. [2022-11-25 23:47:49,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:49,068 INFO L276 IsEmpty]: Start isEmpty. Operand 8976 states and 38969 transitions. [2022-11-25 23:47:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 23:47:49,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:49,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 23:47:49,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:47:49,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:47:49,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:49,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1637829, now seen corresponding path program 1 times [2022-11-25 23:47:49,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:49,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429959556] [2022-11-25 23:47:49,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:49,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:49,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:49,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429959556] [2022-11-25 23:47:49,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429959556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:47:49,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702206991] [2022-11-25 23:47:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:49,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:49,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:47:49,310 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:47:49,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:47:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:49,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:47:49,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:49,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:47:49,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702206991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:47:49,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:47:49,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2022-11-25 23:47:49,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003332401] [2022-11-25 23:47:49,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:47:49,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:47:49,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:47:49,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:47:49,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:47:49,616 INFO L87 Difference]: Start difference. First operand 8976 states and 38969 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:50,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:50,250 INFO L93 Difference]: Finished difference Result 17936 states and 77916 transitions. [2022-11-25 23:47:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:47:50,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-25 23:47:50,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:50,423 INFO L225 Difference]: With dead ends: 17936 [2022-11-25 23:47:50,424 INFO L226 Difference]: Without dead ends: 17936 [2022-11-25 23:47:50,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:47:50,427 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:50,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 18 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:47:50,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17936 states. [2022-11-25 23:47:51,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17936 to 8973. [2022-11-25 23:47:51,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8973 states, 8539 states have (on average 4.563297810048015) internal successors, (38966), 8972 states have internal predecessors, (38966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:51,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8973 states to 8973 states and 38966 transitions. [2022-11-25 23:47:51,314 INFO L78 Accepts]: Start accepts. Automaton has 8973 states and 38966 transitions. Word has length 3 [2022-11-25 23:47:51,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:51,315 INFO L495 AbstractCegarLoop]: Abstraction has 8973 states and 38966 transitions. [2022-11-25 23:47:51,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 8973 states and 38966 transitions. [2022-11-25 23:47:51,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 23:47:51,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:51,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 23:47:51,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:47:51,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:51,524 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:47:51,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:51,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1637830, now seen corresponding path program 1 times [2022-11-25 23:47:51,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:51,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950850092] [2022-11-25 23:47:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:51,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:51,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:51,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950850092] [2022-11-25 23:47:51,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950850092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:47:51,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790116568] [2022-11-25 23:47:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:51,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:51,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:47:51,681 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:47:51,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:47:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:52,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:47:52,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:52,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:52,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790116568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:52,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2124522218] [2022-11-25 23:47:52,099 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:47:52,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:47:52,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 23:47:52,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645220415] [2022-11-25 23:47:52,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:47:52,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:47:52,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:47:52,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:47:52,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:47:52,104 INFO L87 Difference]: Start difference. First operand 8973 states and 38966 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:53,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:53,495 INFO L93 Difference]: Finished difference Result 44834 states and 194784 transitions. [2022-11-25 23:47:53,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:47:53,496 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-25 23:47:53,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:54,288 INFO L225 Difference]: With dead ends: 44834 [2022-11-25 23:47:54,289 INFO L226 Difference]: Without dead ends: 44834 [2022-11-25 23:47:54,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:47:54,292 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 368 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:54,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 30 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:47:54,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44834 states. [2022-11-25 23:47:55,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44834 to 8982. [2022-11-25 23:47:55,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8982 states, 8548 states have (on average 4.56059897051942) internal successors, (38984), 8981 states have internal predecessors, (38984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8982 states to 8982 states and 38984 transitions. [2022-11-25 23:47:55,478 INFO L78 Accepts]: Start accepts. Automaton has 8982 states and 38984 transitions. Word has length 3 [2022-11-25 23:47:55,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:55,478 INFO L495 AbstractCegarLoop]: Abstraction has 8982 states and 38984 transitions. [2022-11-25 23:47:55,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:55,479 INFO L276 IsEmpty]: Start isEmpty. Operand 8982 states and 38984 transitions. [2022-11-25 23:47:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:47:55,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:55,480 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-25 23:47:55,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:47:55,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:55,686 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:47:55,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:55,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1550884610, now seen corresponding path program 2 times [2022-11-25 23:47:55,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:55,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937375236] [2022-11-25 23:47:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:55,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:55,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:55,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937375236] [2022-11-25 23:47:55,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937375236] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:47:55,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051377349] [2022-11-25 23:47:55,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:47:55,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:55,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:47:55,812 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:47:55,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:47:55,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 23:47:55,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:47:56,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:47:56,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:47:56,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:47:56,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051377349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:47:56,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:47:56,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-11-25 23:47:56,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882397384] [2022-11-25 23:47:56,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:47:56,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:47:56,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:47:56,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:47:56,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:47:56,029 INFO L87 Difference]: Start difference. First operand 8982 states and 38984 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:56,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:56,327 INFO L93 Difference]: Finished difference Result 8981 states and 38983 transitions. [2022-11-25 23:47:56,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:47:56,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 23:47:56,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:56,400 INFO L225 Difference]: With dead ends: 8981 [2022-11-25 23:47:56,400 INFO L226 Difference]: Without dead ends: 8981 [2022-11-25 23:47:56,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:47:56,404 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:56,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:47:56,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8981 states. [2022-11-25 23:47:56,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8981 to 8977. [2022-11-25 23:47:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8977 states, 8544 states have (on average 4.561680711610487) internal successors, (38975), 8976 states have internal predecessors, (38975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:57,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8977 states to 8977 states and 38975 transitions. [2022-11-25 23:47:57,003 INFO L78 Accepts]: Start accepts. Automaton has 8977 states and 38975 transitions. Word has length 6 [2022-11-25 23:47:57,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:57,003 INFO L495 AbstractCegarLoop]: Abstraction has 8977 states and 38975 transitions. [2022-11-25 23:47:57,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:57,004 INFO L276 IsEmpty]: Start isEmpty. Operand 8977 states and 38975 transitions. [2022-11-25 23:47:57,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:47:57,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:57,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:47:57,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:47:57,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:57,211 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:47:57,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:57,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1162301208, now seen corresponding path program 1 times [2022-11-25 23:47:57,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:57,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158296645] [2022-11-25 23:47:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:57,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:57,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:57,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158296645] [2022-11-25 23:47:57,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158296645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:47:57,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:47:57,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:47:57,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719613658] [2022-11-25 23:47:57,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:47:57,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:47:57,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:47:57,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:47:57,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:47:57,336 INFO L87 Difference]: Start difference. First operand 8977 states and 38975 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:57,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:57,671 INFO L93 Difference]: Finished difference Result 14111 states and 60965 transitions. [2022-11-25 23:47:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:47:57,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 23:47:57,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:57,775 INFO L225 Difference]: With dead ends: 14111 [2022-11-25 23:47:57,775 INFO L226 Difference]: Without dead ends: 14111 [2022-11-25 23:47:57,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:47:57,776 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:57,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 6 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:47:57,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14111 states. [2022-11-25 23:47:58,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14111 to 10253. [2022-11-25 23:47:58,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10253 states, 9820 states have (on average 4.6743380855397145) internal successors, (45902), 10252 states have internal predecessors, (45902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 45902 transitions. [2022-11-25 23:47:58,440 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 45902 transitions. Word has length 7 [2022-11-25 23:47:58,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:58,450 INFO L495 AbstractCegarLoop]: Abstraction has 10253 states and 45902 transitions. [2022-11-25 23:47:58,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:58,451 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 45902 transitions. [2022-11-25 23:47:58,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:47:58,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:58,451 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2022-11-25 23:47:58,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 23:47:58,454 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:47:58,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:58,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1137208933, now seen corresponding path program 1 times [2022-11-25 23:47:58,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:58,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539995782] [2022-11-25 23:47:58,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:58,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:58,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:58,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539995782] [2022-11-25 23:47:58,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539995782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:47:58,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997213566] [2022-11-25 23:47:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:58,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:58,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:47:58,582 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:47:58,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:47:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:58,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:47:58,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:58,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:58,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997213566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:58,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [429037573] [2022-11-25 23:47:58,857 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:47:58,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:47:58,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 23:47:58,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45239935] [2022-11-25 23:47:58,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:47:58,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:47:58,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:47:58,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:47:58,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:47:58,862 INFO L87 Difference]: Start difference. First operand 10253 states and 45902 transitions. Second operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:01,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:01,266 INFO L93 Difference]: Finished difference Result 112665 states and 504716 transitions. [2022-11-25 23:48:01,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:48:01,266 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 23:48:01,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:02,511 INFO L225 Difference]: With dead ends: 112665 [2022-11-25 23:48:02,512 INFO L226 Difference]: Without dead ends: 112665 [2022-11-25 23:48:02,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:48:02,513 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 782 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:02,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 66 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 23:48:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112665 states. [2022-11-25 23:48:04,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112665 to 10265. [2022-11-25 23:48:04,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10265 states, 9832 states have (on average 4.6710740439381615) internal successors, (45926), 10264 states have internal predecessors, (45926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10265 states to 10265 states and 45926 transitions. [2022-11-25 23:48:04,728 INFO L78 Accepts]: Start accepts. Automaton has 10265 states and 45926 transitions. Word has length 7 [2022-11-25 23:48:04,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:04,729 INFO L495 AbstractCegarLoop]: Abstraction has 10265 states and 45926 transitions. [2022-11-25 23:48:04,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 10265 states and 45926 transitions. [2022-11-25 23:48:04,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:48:04,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:04,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:04,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:04,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:04,937 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:48:04,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:04,937 INFO L85 PathProgramCache]: Analyzing trace with hash 280007166, now seen corresponding path program 1 times [2022-11-25 23:48:04,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:04,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170205209] [2022-11-25 23:48:04,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:04,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:05,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:05,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170205209] [2022-11-25 23:48:05,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170205209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:48:05,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592652890] [2022-11-25 23:48:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:05,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:05,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:05,029 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:05,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:48:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:05,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:48:05,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:05,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:48:05,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592652890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:05,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:48:05,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2] total 5 [2022-11-25 23:48:05,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169321615] [2022-11-25 23:48:05,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:05,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:48:05,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:05,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:48:05,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:48:05,269 INFO L87 Difference]: Start difference. First operand 10265 states and 45926 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:06,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:06,103 INFO L93 Difference]: Finished difference Result 13792 states and 58832 transitions. [2022-11-25 23:48:06,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:48:06,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:48:06,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:06,184 INFO L225 Difference]: With dead ends: 13792 [2022-11-25 23:48:06,185 INFO L226 Difference]: Without dead ends: 13744 [2022-11-25 23:48:06,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:48:06,186 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 105 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:06,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:48:06,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13744 states. [2022-11-25 23:48:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13744 to 11721. [2022-11-25 23:48:06,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11721 states, 11288 states have (on average 4.566353649893692) internal successors, (51545), 11720 states have internal predecessors, (51545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:06,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11721 states to 11721 states and 51545 transitions. [2022-11-25 23:48:06,589 INFO L78 Accepts]: Start accepts. Automaton has 11721 states and 51545 transitions. Word has length 9 [2022-11-25 23:48:06,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:06,590 INFO L495 AbstractCegarLoop]: Abstraction has 11721 states and 51545 transitions. [2022-11-25 23:48:06,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:06,590 INFO L276 IsEmpty]: Start isEmpty. Operand 11721 states and 51545 transitions. [2022-11-25 23:48:06,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:48:06,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:06,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:06,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:06,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 23:48:06,800 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:48:06,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:06,800 INFO L85 PathProgramCache]: Analyzing trace with hash 288951090, now seen corresponding path program 1 times [2022-11-25 23:48:06,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:06,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283972651] [2022-11-25 23:48:06,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:06,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:06,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:06,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283972651] [2022-11-25 23:48:06,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283972651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:06,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:06,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:48:06,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405855767] [2022-11-25 23:48:06,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:06,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:48:06,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:06,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:48:06,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:48:06,945 INFO L87 Difference]: Start difference. First operand 11721 states and 51545 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:07,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:07,294 INFO L93 Difference]: Finished difference Result 15792 states and 66607 transitions. [2022-11-25 23:48:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:48:07,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:48:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:07,378 INFO L225 Difference]: With dead ends: 15792 [2022-11-25 23:48:07,379 INFO L226 Difference]: Without dead ends: 15218 [2022-11-25 23:48:07,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:48:07,380 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 95 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:07,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 18 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:48:07,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15218 states. [2022-11-25 23:48:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15218 to 13324. [2022-11-25 23:48:08,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13324 states, 12891 states have (on average 4.482274455046157) internal successors, (57781), 13323 states have internal predecessors, (57781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:08,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13324 states to 13324 states and 57781 transitions. [2022-11-25 23:48:08,219 INFO L78 Accepts]: Start accepts. Automaton has 13324 states and 57781 transitions. Word has length 9 [2022-11-25 23:48:08,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:08,219 INFO L495 AbstractCegarLoop]: Abstraction has 13324 states and 57781 transitions. [2022-11-25 23:48:08,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:08,219 INFO L276 IsEmpty]: Start isEmpty. Operand 13324 states and 57781 transitions. [2022-11-25 23:48:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:48:08,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:08,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:08,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 23:48:08,222 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:48:08,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:08,223 INFO L85 PathProgramCache]: Analyzing trace with hash 624680378, now seen corresponding path program 1 times [2022-11-25 23:48:08,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:08,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023425046] [2022-11-25 23:48:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:08,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:08,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:08,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023425046] [2022-11-25 23:48:08,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023425046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:48:08,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799589527] [2022-11-25 23:48:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:08,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:08,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:08,331 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:08,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:48:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:08,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:48:08,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:08,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:08,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799589527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:08,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1375559736] [2022-11-25 23:48:08,604 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:48:08,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:48:08,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 23:48:08,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39799146] [2022-11-25 23:48:08,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:08,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:48:08,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:08,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:48:08,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:48:08,606 INFO L87 Difference]: Start difference. First operand 13324 states and 57781 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:09,344 INFO L93 Difference]: Finished difference Result 35402 states and 153642 transitions. [2022-11-25 23:48:09,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:48:09,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 23:48:09,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:09,803 INFO L225 Difference]: With dead ends: 35402 [2022-11-25 23:48:09,803 INFO L226 Difference]: Without dead ends: 35402 [2022-11-25 23:48:09,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:48:09,804 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 314 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:09,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 21 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:48:09,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35402 states. [2022-11-25 23:48:10,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35402 to 22216. [2022-11-25 23:48:10,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22216 states, 21783 states have (on average 4.833264472294909) internal successors, (105283), 22215 states have internal predecessors, (105283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:10,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22216 states to 22216 states and 105283 transitions. [2022-11-25 23:48:10,670 INFO L78 Accepts]: Start accepts. Automaton has 22216 states and 105283 transitions. Word has length 10 [2022-11-25 23:48:10,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:10,671 INFO L495 AbstractCegarLoop]: Abstraction has 22216 states and 105283 transitions. [2022-11-25 23:48:10,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:10,671 INFO L276 IsEmpty]: Start isEmpty. Operand 22216 states and 105283 transitions. [2022-11-25 23:48:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:48:10,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:10,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:10,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:10,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:10,874 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:48:10,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:10,875 INFO L85 PathProgramCache]: Analyzing trace with hash 624680379, now seen corresponding path program 1 times [2022-11-25 23:48:10,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:10,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102025536] [2022-11-25 23:48:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:10,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:10,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:10,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102025536] [2022-11-25 23:48:10,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102025536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:10,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:10,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:48:10,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500792200] [2022-11-25 23:48:10,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:10,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:48:10,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:10,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:48:10,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:48:10,956 INFO L87 Difference]: Start difference. First operand 22216 states and 105283 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:11,650 INFO L93 Difference]: Finished difference Result 20734 states and 94390 transitions. [2022-11-25 23:48:11,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:48:11,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 23:48:11,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:11,772 INFO L225 Difference]: With dead ends: 20734 [2022-11-25 23:48:11,773 INFO L226 Difference]: Without dead ends: 20734 [2022-11-25 23:48:11,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:48:11,773 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:11,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 3 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:48:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20734 states. [2022-11-25 23:48:12,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20734 to 20734. [2022-11-25 23:48:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20734 states, 20445 states have (on average 4.616776718023967) internal successors, (94390), 20733 states have internal predecessors, (94390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20734 states to 20734 states and 94390 transitions. [2022-11-25 23:48:12,328 INFO L78 Accepts]: Start accepts. Automaton has 20734 states and 94390 transitions. Word has length 10 [2022-11-25 23:48:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:12,329 INFO L495 AbstractCegarLoop]: Abstraction has 20734 states and 94390 transitions. [2022-11-25 23:48:12,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 20734 states and 94390 transitions. [2022-11-25 23:48:12,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:48:12,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:12,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:12,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 23:48:12,331 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:48:12,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:12,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1755627313, now seen corresponding path program 1 times [2022-11-25 23:48:12,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:12,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671584674] [2022-11-25 23:48:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:12,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:12,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:12,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671584674] [2022-11-25 23:48:12,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671584674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:12,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:12,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:48:12,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099577190] [2022-11-25 23:48:12,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:12,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:48:12,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:12,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:48:12,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:48:12,539 INFO L87 Difference]: Start difference. First operand 20734 states and 94390 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:13,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:13,361 INFO L93 Difference]: Finished difference Result 28657 states and 126840 transitions. [2022-11-25 23:48:13,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:48:13,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 23:48:13,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:13,499 INFO L225 Difference]: With dead ends: 28657 [2022-11-25 23:48:13,499 INFO L226 Difference]: Without dead ends: 28609 [2022-11-25 23:48:13,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:48:13,500 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 200 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:13,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 0 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:48:13,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28609 states. [2022-11-25 23:48:14,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28609 to 22806. [2022-11-25 23:48:14,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22806 states, 22589 states have (on average 4.620744610208509) internal successors, (104378), 22805 states have internal predecessors, (104378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:14,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22806 states to 22806 states and 104378 transitions. [2022-11-25 23:48:14,141 INFO L78 Accepts]: Start accepts. Automaton has 22806 states and 104378 transitions. Word has length 10 [2022-11-25 23:48:14,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:14,142 INFO L495 AbstractCegarLoop]: Abstraction has 22806 states and 104378 transitions. [2022-11-25 23:48:14,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:14,142 INFO L276 IsEmpty]: Start isEmpty. Operand 22806 states and 104378 transitions. [2022-11-25 23:48:14,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:48:14,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:14,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:14,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 23:48:14,143 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:48:14,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:14,144 INFO L85 PathProgramCache]: Analyzing trace with hash -869612550, now seen corresponding path program 1 times [2022-11-25 23:48:14,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:14,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363878314] [2022-11-25 23:48:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:14,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:15,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:15,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363878314] [2022-11-25 23:48:15,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363878314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:48:15,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975576384] [2022-11-25 23:48:15,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:15,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:15,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:15,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:15,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:48:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:15,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:48:15,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:15,436 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 [2022-11-25 23:48:15,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:15,494 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 [2022-11-25 23:48:15,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:15,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:48:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:15,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:15,614 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_530 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_530) c_~f~0.base) (+ c_~f~0.offset (* c_~j~0 4))) 2147483649)) is different from false [2022-11-25 23:48:15,679 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:48:15,679 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 [2022-11-25 23:48:15,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:48:15,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 75 [2022-11-25 23:48:15,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-11-25 23:48:15,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-11-25 23:48:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:15,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975576384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:15,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [965240625] [2022-11-25 23:48:15,858 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:48:15,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:48:15,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-11-25 23:48:15,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938483787] [2022-11-25 23:48:15,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:15,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 23:48:15,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:15,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 23:48:15,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=144, Unknown=2, NotChecked=24, Total=210 [2022-11-25 23:48:15,861 INFO L87 Difference]: Start difference. First operand 22806 states and 104378 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:17,171 INFO L93 Difference]: Finished difference Result 46109 states and 205674 transitions. [2022-11-25 23:48:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:48:17,172 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 23:48:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:17,499 INFO L225 Difference]: With dead ends: 46109 [2022-11-25 23:48:17,499 INFO L226 Difference]: Without dead ends: 46109 [2022-11-25 23:48:17,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=236, Unknown=2, NotChecked=32, Total=342 [2022-11-25 23:48:17,501 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 361 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:17,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 47 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 610 Invalid, 0 Unknown, 104 Unchecked, 0.7s Time] [2022-11-25 23:48:17,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46109 states. [2022-11-25 23:48:18,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46109 to 25354. [2022-11-25 23:48:18,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25354 states, 25137 states have (on average 4.825038787444803) internal successors, (121287), 25353 states have internal predecessors, (121287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:18,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25354 states to 25354 states and 121287 transitions. [2022-11-25 23:48:18,994 INFO L78 Accepts]: Start accepts. Automaton has 25354 states and 121287 transitions. Word has length 11 [2022-11-25 23:48:18,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:18,994 INFO L495 AbstractCegarLoop]: Abstraction has 25354 states and 121287 transitions. [2022-11-25 23:48:18,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:18,994 INFO L276 IsEmpty]: Start isEmpty. Operand 25354 states and 121287 transitions. [2022-11-25 23:48:18,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:48:18,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:18,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:19,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:19,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:19,196 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:48:19,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:19,197 INFO L85 PathProgramCache]: Analyzing trace with hash -963164349, now seen corresponding path program 1 times [2022-11-25 23:48:19,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:19,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213079438] [2022-11-25 23:48:19,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:19,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:19,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:19,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213079438] [2022-11-25 23:48:19,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213079438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:19,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:19,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:48:19,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139013442] [2022-11-25 23:48:19,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:19,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:48:19,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:19,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:48:19,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:48:19,321 INFO L87 Difference]: Start difference. First operand 25354 states and 121287 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:20,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:20,052 INFO L93 Difference]: Finished difference Result 24158 states and 112802 transitions. [2022-11-25 23:48:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:48:20,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 23:48:20,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:20,168 INFO L225 Difference]: With dead ends: 24158 [2022-11-25 23:48:20,168 INFO L226 Difference]: Without dead ends: 24054 [2022-11-25 23:48:20,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:48:20,169 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:20,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 8 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:48:20,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24054 states. [2022-11-25 23:48:20,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24054 to 22978. [2022-11-25 23:48:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22978 states, 22761 states have (on average 4.77531742893546) internal successors, (108691), 22977 states have internal predecessors, (108691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22978 states to 22978 states and 108691 transitions. [2022-11-25 23:48:20,765 INFO L78 Accepts]: Start accepts. Automaton has 22978 states and 108691 transitions. Word has length 12 [2022-11-25 23:48:20,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:20,766 INFO L495 AbstractCegarLoop]: Abstraction has 22978 states and 108691 transitions. [2022-11-25 23:48:20,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:20,766 INFO L276 IsEmpty]: Start isEmpty. Operand 22978 states and 108691 transitions. [2022-11-25 23:48:20,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:48:20,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:20,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:20,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 23:48:20,768 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:48:20,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:20,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1188179029, now seen corresponding path program 1 times [2022-11-25 23:48:20,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:20,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505265905] [2022-11-25 23:48:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:20,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:21,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:21,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505265905] [2022-11-25 23:48:21,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505265905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:48:21,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138288139] [2022-11-25 23:48:21,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:21,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:21,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:21,651 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:21,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:48:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:21,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 23:48:21,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:21,986 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 [2022-11-25 23:48:22,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:22,067 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 [2022-11-25 23:48:22,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:22,128 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 [2022-11-25 23:48:22,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:22,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:48:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:22,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:22,343 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_634 (Array Int Int)) (v_ArrVal_633 (Array Int Int)) (v_ArrVal_635 (Array Int Int))) (< (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_633) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_634) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_635) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~j~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 2147483649)) is different from false [2022-11-25 23:48:22,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:48:22,361 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2022-11-25 23:48:22,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:48:22,376 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 [2022-11-25 23:48:22,389 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 478 [2022-11-25 23:48:22,404 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 263 treesize of output 215 [2022-11-25 23:48:22,418 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 [2022-11-25 23:48:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-25 23:48:22,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138288139] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:22,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1800067838] [2022-11-25 23:48:22,807 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:48:22,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:48:22,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-11-25 23:48:22,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981904781] [2022-11-25 23:48:22,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:22,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 23:48:22,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:22,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 23:48:22,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=239, Unknown=6, NotChecked=32, Total=342 [2022-11-25 23:48:22,810 INFO L87 Difference]: Start difference. First operand 22978 states and 108691 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:24,085 INFO L93 Difference]: Finished difference Result 41551 states and 183198 transitions. [2022-11-25 23:48:24,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:48:24,085 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 23:48:24,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:24,293 INFO L225 Difference]: With dead ends: 41551 [2022-11-25 23:48:24,293 INFO L226 Difference]: Without dead ends: 41551 [2022-11-25 23:48:24,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=359, Unknown=7, NotChecked=40, Total=506 [2022-11-25 23:48:24,293 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 336 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:24,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 66 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 791 Invalid, 0 Unknown, 158 Unchecked, 0.8s Time] [2022-11-25 23:48:24,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41551 states. [2022-11-25 23:48:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41551 to 22978. [2022-11-25 23:48:25,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22978 states, 22761 states have (on average 4.770089187645534) internal successors, (108572), 22977 states have internal predecessors, (108572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22978 states to 22978 states and 108572 transitions. [2022-11-25 23:48:25,331 INFO L78 Accepts]: Start accepts. Automaton has 22978 states and 108572 transitions. Word has length 12 [2022-11-25 23:48:25,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:25,331 INFO L495 AbstractCegarLoop]: Abstraction has 22978 states and 108572 transitions. [2022-11-25 23:48:25,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:25,331 INFO L276 IsEmpty]: Start isEmpty. Operand 22978 states and 108572 transitions. [2022-11-25 23:48:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:48:25,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:25,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:25,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:25,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 23:48:25,533 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:48:25,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:25,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1821008870, now seen corresponding path program 1 times [2022-11-25 23:48:25,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:25,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272616625] [2022-11-25 23:48:25,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:25,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:25,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:25,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272616625] [2022-11-25 23:48:25,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272616625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:48:25,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959489878] [2022-11-25 23:48:25,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:25,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:25,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:25,745 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:25,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:48:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:25,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:48:25,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:26,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:26,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959489878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:26,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1105799753] [2022-11-25 23:48:26,132 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:48:26,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:48:26,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 23:48:26,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691425430] [2022-11-25 23:48:26,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:26,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:48:26,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:26,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:48:26,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:48:26,136 INFO L87 Difference]: Start difference. First operand 22978 states and 108572 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:27,452 INFO L93 Difference]: Finished difference Result 48660 states and 223711 transitions. [2022-11-25 23:48:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:48:27,454 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 23:48:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:27,761 INFO L225 Difference]: With dead ends: 48660 [2022-11-25 23:48:27,761 INFO L226 Difference]: Without dead ends: 48564 [2022-11-25 23:48:27,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:48:27,762 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 370 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:27,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 63 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:48:27,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48564 states. [2022-11-25 23:48:29,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48564 to 30624. [2022-11-25 23:48:29,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30624 states, 30407 states have (on average 4.9151511165192225) internal successors, (149455), 30623 states have internal predecessors, (149455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:29,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30624 states to 30624 states and 149455 transitions. [2022-11-25 23:48:29,313 INFO L78 Accepts]: Start accepts. Automaton has 30624 states and 149455 transitions. Word has length 13 [2022-11-25 23:48:29,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:29,314 INFO L495 AbstractCegarLoop]: Abstraction has 30624 states and 149455 transitions. [2022-11-25 23:48:29,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:29,314 INFO L276 IsEmpty]: Start isEmpty. Operand 30624 states and 149455 transitions. [2022-11-25 23:48:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:48:29,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:29,315 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1] [2022-11-25 23:48:29,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:29,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 23:48:29,519 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:48:29,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:29,520 INFO L85 PathProgramCache]: Analyzing trace with hash 85363013, now seen corresponding path program 2 times [2022-11-25 23:48:29,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:29,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498289609] [2022-11-25 23:48:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:29,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:29,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:29,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498289609] [2022-11-25 23:48:29,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498289609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:48:29,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253859414] [2022-11-25 23:48:29,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:48:29,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:29,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:29,746 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:29,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:48:29,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 23:48:29,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:48:29,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:48:29,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 23:48:30,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:48:30,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253859414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:30,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:48:30,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2022-11-25 23:48:30,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742045501] [2022-11-25 23:48:30,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:30,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:48:30,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:30,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:48:30,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:48:30,010 INFO L87 Difference]: Start difference. First operand 30624 states and 149455 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:30,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:30,362 INFO L93 Difference]: Finished difference Result 28529 states and 139275 transitions. [2022-11-25 23:48:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:48:30,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 23:48:30,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:30,501 INFO L225 Difference]: With dead ends: 28529 [2022-11-25 23:48:30,502 INFO L226 Difference]: Without dead ends: 28529 [2022-11-25 23:48:30,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:48:30,502 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:30,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 12 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:48:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28529 states. [2022-11-25 23:48:31,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28529 to 24831. [2022-11-25 23:48:31,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24831 states, 24651 states have (on average 4.86045190864468) internal successors, (119815), 24830 states have internal predecessors, (119815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24831 states to 24831 states and 119815 transitions. [2022-11-25 23:48:31,778 INFO L78 Accepts]: Start accepts. Automaton has 24831 states and 119815 transitions. Word has length 13 [2022-11-25 23:48:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:31,778 INFO L495 AbstractCegarLoop]: Abstraction has 24831 states and 119815 transitions. [2022-11-25 23:48:31,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 24831 states and 119815 transitions. [2022-11-25 23:48:31,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:48:31,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:31,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:31,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:31,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 23:48:31,981 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:48:31,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:31,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1545314931, now seen corresponding path program 1 times [2022-11-25 23:48:31,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:31,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492345642] [2022-11-25 23:48:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:31,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:32,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:32,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492345642] [2022-11-25 23:48:32,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492345642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:32,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:32,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:48:32,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899464738] [2022-11-25 23:48:32,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:32,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:48:32,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:32,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:48:32,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:48:32,199 INFO L87 Difference]: Start difference. First operand 24831 states and 119815 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:32,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:32,756 INFO L93 Difference]: Finished difference Result 25810 states and 122524 transitions. [2022-11-25 23:48:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:48:32,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-25 23:48:32,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:33,421 INFO L225 Difference]: With dead ends: 25810 [2022-11-25 23:48:33,421 INFO L226 Difference]: Without dead ends: 25649 [2022-11-25 23:48:33,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:48:33,422 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 154 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:33,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 3 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:48:33,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25649 states. [2022-11-25 23:48:33,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25649 to 24386. [2022-11-25 23:48:33,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24386 states, 24206 states have (on average 4.869701726844584) internal successors, (117876), 24385 states have internal predecessors, (117876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:34,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24386 states to 24386 states and 117876 transitions. [2022-11-25 23:48:34,055 INFO L78 Accepts]: Start accepts. Automaton has 24386 states and 117876 transitions. Word has length 14 [2022-11-25 23:48:34,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:34,055 INFO L495 AbstractCegarLoop]: Abstraction has 24386 states and 117876 transitions. [2022-11-25 23:48:34,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:34,055 INFO L276 IsEmpty]: Start isEmpty. Operand 24386 states and 117876 transitions. [2022-11-25 23:48:34,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:48:34,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:34,057 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2022-11-25 23:48:34,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 23:48:34,058 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2022-11-25 23:48:34,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:34,059 INFO L85 PathProgramCache]: Analyzing trace with hash -176401733, now seen corresponding path program 1 times [2022-11-25 23:48:34,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:34,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383761671] [2022-11-25 23:48:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:34,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:34,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:34,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383761671] [2022-11-25 23:48:34,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383761671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:48:34,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929266309] [2022-11-25 23:48:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:34,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:34,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:34,283 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:34,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb5a80c1-0e02-4a30-b994-d618f1d8ffa4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:48:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:34,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:48:34,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:34,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:34,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929266309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:34,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1451888714] [2022-11-25 23:48:34,793 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:48:34,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:48:34,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-25 23:48:34,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494701792] [2022-11-25 23:48:34,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:34,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 23:48:34,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:34,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 23:48:34,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-25 23:48:34,796 INFO L87 Difference]: Start difference. First operand 24386 states and 117876 transitions. Second operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)