./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 658086e6a2b970f68ba6fa20919311f7cc4c75e1705e5ad288c4fd1e6439159f --- 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-5e519f3 [2022-11-03 03:40:13,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:40:13,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:40:13,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:40:13,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:40:13,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:40:13,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:40:13,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:40:13,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:40:13,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:40:13,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:40:13,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:40:13,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:40:13,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:40:13,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:40:13,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:40:13,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:40:13,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:40:13,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:40:13,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:40:13,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:40:13,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:40:13,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:40:13,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:40:13,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:40:13,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:40:13,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:40:13,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:40:13,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:40:13,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:40:13,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:40:13,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:40:13,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:40:13,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:40:13,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:40:13,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:40:13,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:40:13,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:40:13,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:40:13,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:40:13,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:40:13,394 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:40:13,418 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:40:13,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:40:13,419 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:40:13,419 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:40:13,420 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:40:13,420 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:40:13,420 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:40:13,421 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:40:13,421 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:40:13,421 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:40:13,421 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:40:13,422 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:40:13,422 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:40:13,422 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:40:13,422 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:40:13,423 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:40:13,423 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:40:13,423 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:40:13,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:40:13,424 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:40:13,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:40:13,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:40:13,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:40:13,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:40:13,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:40:13,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:40:13,426 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:40:13,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:40:13,426 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:40:13,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:40:13,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:40:13,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:40:13,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:40:13,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:40:13,428 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:40:13,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:40:13,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:40:13,428 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:40:13,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:40:13,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:40:13,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:40:13,429 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 658086e6a2b970f68ba6fa20919311f7cc4c75e1705e5ad288c4fd1e6439159f [2022-11-03 03:40:13,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:40:13,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:40:13,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:40:13,703 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:40:13,704 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:40:13,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i [2022-11-03 03:40:13,778 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/data/294445a41/c26920cbe6ef4b32a191b70baafb513e/FLAG304043c5b [2022-11-03 03:40:14,232 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:40:14,233 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i [2022-11-03 03:40:14,246 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/data/294445a41/c26920cbe6ef4b32a191b70baafb513e/FLAG304043c5b [2022-11-03 03:40:14,578 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/data/294445a41/c26920cbe6ef4b32a191b70baafb513e [2022-11-03 03:40:14,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:40:14,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:40:14,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:40:14,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:40:14,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:40:14,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:14" (1/1) ... [2022-11-03 03:40:14,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4217c62d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:14, skipping insertion in model container [2022-11-03 03:40:14,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:14" (1/1) ... [2022-11-03 03:40:14,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:40:14,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:40:14,839 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-03 03:40:15,077 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[30448,30461] [2022-11-03 03:40:15,090 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[30811,30824] [2022-11-03 03:40:15,103 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31483,31496] [2022-11-03 03:40:15,104 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31534,31547] [2022-11-03 03:40:15,108 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31683,31696] [2022-11-03 03:40:15,111 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31760,31773] [2022-11-03 03:40:15,116 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31807,31820] [2022-11-03 03:40:15,118 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31916,31929] [2022-11-03 03:40:15,124 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32035,32048] [2022-11-03 03:40:15,125 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32083,32096] [2022-11-03 03:40:15,126 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32160,32173] [2022-11-03 03:40:15,129 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32286,32299] [2022-11-03 03:40:15,145 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32869,32882] [2022-11-03 03:40:15,150 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32946,32959] [2022-11-03 03:40:15,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:40:15,163 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:40:15,180 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-03 03:40:15,208 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[30448,30461] [2022-11-03 03:40:15,213 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[30811,30824] [2022-11-03 03:40:15,225 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31483,31496] [2022-11-03 03:40:15,226 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31534,31547] [2022-11-03 03:40:15,228 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31683,31696] [2022-11-03 03:40:15,231 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31760,31773] [2022-11-03 03:40:15,234 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31807,31820] [2022-11-03 03:40:15,236 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[31916,31929] [2022-11-03 03:40:15,237 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32035,32048] [2022-11-03 03:40:15,239 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32083,32096] [2022-11-03 03:40:15,240 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32160,32173] [2022-11-03 03:40:15,242 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32286,32299] [2022-11-03 03:40:15,251 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32869,32882] [2022-11-03 03:40:15,256 WARN L230 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_2fc04c86-4442-4965-b4a1-9516f65ae60b/sv-benchmarks/c/pthread-divine/one_time_barrier_3t.i[32946,32959] [2022-11-03 03:40:15,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:40:15,302 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:40:15,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:15 WrapperNode [2022-11-03 03:40:15,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:40:15,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:40:15,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:40:15,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:40:15,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:15" (1/1) ... [2022-11-03 03:40:15,341 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:15" (1/1) ... [2022-11-03 03:40:15,389 INFO L138 Inliner]: procedures = 174, calls = 75, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 464 [2022-11-03 03:40:15,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:40:15,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:40:15,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:40:15,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:40:15,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:15" (1/1) ... [2022-11-03 03:40:15,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:15" (1/1) ... [2022-11-03 03:40:15,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:15" (1/1) ... [2022-11-03 03:40:15,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:15" (1/1) ... [2022-11-03 03:40:15,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:15" (1/1) ... [2022-11-03 03:40:15,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:15" (1/1) ... [2022-11-03 03:40:15,465 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:15" (1/1) ... [2022-11-03 03:40:15,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:15" (1/1) ... [2022-11-03 03:40:15,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:40:15,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:40:15,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:40:15,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:40:15,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:15" (1/1) ... [2022-11-03 03:40:15,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:40:15,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:40:15,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:40:15,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:40:15,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:40:15,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:40:15,568 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-03 03:40:15,568 INFO L130 BoogieDeclarations]: Found specification of procedure worker_fn [2022-11-03 03:40:15,568 INFO L138 BoogieDeclarations]: Found implementation of procedure worker_fn [2022-11-03 03:40:15,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:40:15,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:40:15,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:40:15,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:40:15,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:40:15,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:40:15,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:40:15,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:40:15,572 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-03 03:40:15,746 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:40:15,747 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:40:16,478 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:40:16,489 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:40:16,489 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-03 03:40:16,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:40:16 BoogieIcfgContainer [2022-11-03 03:40:16,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:40:16,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:40:16,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:40:16,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:40:16,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:40:14" (1/3) ... [2022-11-03 03:40:16,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ce64903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:40:16, skipping insertion in model container [2022-11-03 03:40:16,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:15" (2/3) ... [2022-11-03 03:40:16,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ce64903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:40:16, skipping insertion in model container [2022-11-03 03:40:16,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:40:16" (3/3) ... [2022-11-03 03:40:16,502 INFO L112 eAbstractionObserver]: Analyzing ICFG one_time_barrier_3t.i [2022-11-03 03:40:16,510 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-03 03:40:16,523 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:40:16,524 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2022-11-03 03:40:16,524 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-03 03:40:16,654 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-03 03:40:16,716 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 03:40:16,732 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 473 places, 532 transitions, 1072 flow [2022-11-03 03:40:16,740 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 473 places, 532 transitions, 1072 flow [2022-11-03 03:40:16,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 473 places, 532 transitions, 1072 flow [2022-11-03 03:40:17,133 INFO L130 PetriNetUnfolder]: 94/783 cut-off events. [2022-11-03 03:40:17,134 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-03 03:40:17,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 783 events. 94/783 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2651 event pairs, 0 based on Foata normal form. 0/645 useless extension candidates. Maximal degree in co-relation 460. Up to 4 conditions per place. [2022-11-03 03:40:17,196 INFO L118 LiptonReduction]: Number of co-enabled transitions 104856 [2022-11-03 03:40:37,313 INFO L133 LiptonReduction]: Checked pairs total: 246421 [2022-11-03 03:40:37,313 INFO L135 LiptonReduction]: Total number of compositions: 566 [2022-11-03 03:40:37,322 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 128 places, 157 transitions, 322 flow [2022-11-03 03:40:37,453 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3771 states, 3535 states have (on average 2.600848656294201) internal successors, (9194), 3770 states have internal predecessors, (9194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:37,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:40:37,477 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;@661b0d83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:40:37,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2022-11-03 03:40:37,488 INFO L276 IsEmpty]: Start isEmpty. Operand has 3771 states, 3535 states have (on average 2.600848656294201) internal successors, (9194), 3770 states have internal predecessors, (9194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:37,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-03 03:40:37,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:37,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-03 03:40:37,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-11-03 03:40:37,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:37,499 INFO L85 PathProgramCache]: Analyzing trace with hash 67901, now seen corresponding path program 1 times [2022-11-03 03:40:37,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:37,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902121740] [2022-11-03 03:40:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:37,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:37,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:37,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902121740] [2022-11-03 03:40:37,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902121740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:37,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:40:37,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 03:40:37,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100015026] [2022-11-03 03:40:37,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:37,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:40:37,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:37,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:40:37,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:40:37,873 INFO L87 Difference]: Start difference. First operand has 3771 states, 3535 states have (on average 2.600848656294201) internal successors, (9194), 3770 states have internal predecessors, (9194), 0 states have call successors, (0), 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 2 states, 1 states have (on average 2.0) 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) [2022-11-03 03:40:38,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:38,133 INFO L93 Difference]: Finished difference Result 3770 states and 8397 transitions. [2022-11-03 03:40:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:40:38,135 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) 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 [2022-11-03 03:40:38,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:38,187 INFO L225 Difference]: With dead ends: 3770 [2022-11-03 03:40:38,187 INFO L226 Difference]: Without dead ends: 3768 [2022-11-03 03:40:38,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:40:38,191 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:38,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:40:38,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2022-11-03 03:40:38,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3768. [2022-11-03 03:40:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3768 states, 3535 states have (on average 2.3745403111739747) internal successors, (8394), 3767 states have internal predecessors, (8394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3768 states to 3768 states and 8394 transitions. [2022-11-03 03:40:38,369 INFO L78 Accepts]: Start accepts. Automaton has 3768 states and 8394 transitions. Word has length 2 [2022-11-03 03:40:38,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:38,369 INFO L495 AbstractCegarLoop]: Abstraction has 3768 states and 8394 transitions. [2022-11-03 03:40:38,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) 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) [2022-11-03 03:40:38,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3768 states and 8394 transitions. [2022-11-03 03:40:38,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 03:40:38,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:38,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 03:40:38,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:40:38,371 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-11-03 03:40:38,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:38,371 INFO L85 PathProgramCache]: Analyzing trace with hash 2025811435, now seen corresponding path program 1 times [2022-11-03 03:40:38,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:38,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010331154] [2022-11-03 03:40:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:38,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:38,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:38,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010331154] [2022-11-03 03:40:38,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010331154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:38,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:40:38,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:40:38,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858329517] [2022-11-03 03:40:38,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:38,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:40:38,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:38,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:40:38,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:40:38,492 INFO L87 Difference]: Start difference. First operand 3768 states and 8394 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:38,780 INFO L93 Difference]: Finished difference Result 3769 states and 8395 transitions. [2022-11-03 03:40:38,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:40:38,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-03 03:40:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:38,801 INFO L225 Difference]: With dead ends: 3769 [2022-11-03 03:40:38,801 INFO L226 Difference]: Without dead ends: 3769 [2022-11-03 03:40:38,802 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 [2022-11-03 03:40:38,809 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:38,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:40:38,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2022-11-03 03:40:38,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3769. [2022-11-03 03:40:38,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3769 states, 3536 states have (on average 2.374151583710407) internal successors, (8395), 3768 states have internal predecessors, (8395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3769 states to 3769 states and 8395 transitions. [2022-11-03 03:40:38,932 INFO L78 Accepts]: Start accepts. Automaton has 3769 states and 8395 transitions. Word has length 5 [2022-11-03 03:40:38,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:38,933 INFO L495 AbstractCegarLoop]: Abstraction has 3769 states and 8395 transitions. [2022-11-03 03:40:38,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:38,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3769 states and 8395 transitions. [2022-11-03 03:40:38,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 03:40:38,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:38,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 03:40:38,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:40:38,936 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-11-03 03:40:38,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:38,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1732603515, now seen corresponding path program 1 times [2022-11-03 03:40:38,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:38,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130636419] [2022-11-03 03:40:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:38,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:39,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:39,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130636419] [2022-11-03 03:40:39,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130636419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:40:39,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868826220] [2022-11-03 03:40:39,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:39,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:39,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:40:39,161 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:40:39,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:40:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:39,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:40:39,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:40:39,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:40:39,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868826220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:39,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:40:39,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-03 03:40:39,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740482328] [2022-11-03 03:40:39,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:39,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:40:39,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:39,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:40:39,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:40:39,373 INFO L87 Difference]: Start difference. First operand 3769 states and 8395 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:39,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:39,696 INFO L93 Difference]: Finished difference Result 3715 states and 8332 transitions. [2022-11-03 03:40:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:40:39,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 [2022-11-03 03:40:39,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:39,714 INFO L225 Difference]: With dead ends: 3715 [2022-11-03 03:40:39,714 INFO L226 Difference]: Without dead ends: 3715 [2022-11-03 03:40:39,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:40:39,726 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 66 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:39,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 32 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:40:39,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3715 states. [2022-11-03 03:40:39,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3715 to 3715. [2022-11-03 03:40:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3715 states, 3494 states have (on average 2.3846594161419574) internal successors, (8332), 3714 states have internal predecessors, (8332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3715 states to 3715 states and 8332 transitions. [2022-11-03 03:40:39,855 INFO L78 Accepts]: Start accepts. Automaton has 3715 states and 8332 transitions. Word has length 6 [2022-11-03 03:40:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:39,856 INFO L495 AbstractCegarLoop]: Abstraction has 3715 states and 8332 transitions. [2022-11-03 03:40:39,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3715 states and 8332 transitions. [2022-11-03 03:40:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 03:40:39,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:39,858 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:39,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:40:40,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:40,085 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-11-03 03:40:40,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:40,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1328923366, now seen corresponding path program 1 times [2022-11-03 03:40:40,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:40,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375454451] [2022-11-03 03:40:40,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:40,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:40:40,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:40,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375454451] [2022-11-03 03:40:40,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375454451] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:40:40,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112431079] [2022-11-03 03:40:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:40,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:40,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:40:40,156 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:40:40,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:40:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:40,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:40:40,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:40:40,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:40:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:40:40,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112431079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:40,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [405219659] [2022-11-03 03:40:40,364 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:336) 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) [2022-11-03 03:40:40,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:40:40,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-03 03:40:40,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239678194] [2022-11-03 03:40:40,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:40:40,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:40:40,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:40,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:40:40,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:40:40,374 INFO L87 Difference]: Start difference. First operand 3715 states and 8332 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2022-11-03 03:40:40,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:40,648 INFO L93 Difference]: Finished difference Result 3717 states and 8334 transitions. [2022-11-03 03:40:40,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:40:40,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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 8 [2022-11-03 03:40:40,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:40,666 INFO L225 Difference]: With dead ends: 3717 [2022-11-03 03:40:40,666 INFO L226 Difference]: Without dead ends: 3717 [2022-11-03 03:40:40,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:40:40,668 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:40,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:40:40,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3717 states. [2022-11-03 03:40:40,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3717 to 3717. [2022-11-03 03:40:40,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3717 states, 3496 states have (on average 2.3838672768878717) internal successors, (8334), 3716 states have internal predecessors, (8334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:40,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3717 states to 3717 states and 8334 transitions. [2022-11-03 03:40:40,805 INFO L78 Accepts]: Start accepts. Automaton has 3717 states and 8334 transitions. Word has length 8 [2022-11-03 03:40:40,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:40,805 INFO L495 AbstractCegarLoop]: Abstraction has 3717 states and 8334 transitions. [2022-11-03 03:40:40,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2022-11-03 03:40:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3717 states and 8334 transitions. [2022-11-03 03:40:40,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 03:40:40,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:40,806 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2022-11-03 03:40:40,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:40:41,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:41,021 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-11-03 03:40:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:41,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1716156506, now seen corresponding path program 2 times [2022-11-03 03:40:41,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:41,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718498092] [2022-11-03 03:40:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:41,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:40:41,061 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:40:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:40:41,164 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:40:41,177 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:40:41,178 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (39 of 40 remaining) [2022-11-03 03:40:41,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (38 of 40 remaining) [2022-11-03 03:40:41,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (37 of 40 remaining) [2022-11-03 03:40:41,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (36 of 40 remaining) [2022-11-03 03:40:41,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (35 of 40 remaining) [2022-11-03 03:40:41,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (34 of 40 remaining) [2022-11-03 03:40:41,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (33 of 40 remaining) [2022-11-03 03:40:41,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION (32 of 40 remaining) [2022-11-03 03:40:41,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION (31 of 40 remaining) [2022-11-03 03:40:41,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION (30 of 40 remaining) [2022-11-03 03:40:41,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION (29 of 40 remaining) [2022-11-03 03:40:41,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION (28 of 40 remaining) [2022-11-03 03:40:41,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION (27 of 40 remaining) [2022-11-03 03:40:41,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION (26 of 40 remaining) [2022-11-03 03:40:41,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION (25 of 40 remaining) [2022-11-03 03:40:41,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION (24 of 40 remaining) [2022-11-03 03:40:41,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (23 of 40 remaining) [2022-11-03 03:40:41,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr1ASSERT_VIOLATIONERROR_FUNCTION (22 of 40 remaining) [2022-11-03 03:40:41,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr2ASSERT_VIOLATIONERROR_FUNCTION (21 of 40 remaining) [2022-11-03 03:40:41,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr4ASSERT_VIOLATIONERROR_FUNCTION (20 of 40 remaining) [2022-11-03 03:40:41,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr3ASSERT_VIOLATIONERROR_FUNCTION (19 of 40 remaining) [2022-11-03 03:40:41,185 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr5ASSERT_VIOLATIONERROR_FUNCTION (18 of 40 remaining) [2022-11-03 03:40:41,185 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr6ASSERT_VIOLATIONERROR_FUNCTION (17 of 40 remaining) [2022-11-03 03:40:41,185 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr7ASSERT_VIOLATIONERROR_FUNCTION (16 of 40 remaining) [2022-11-03 03:40:41,185 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr10ASSERT_VIOLATIONERROR_FUNCTION (15 of 40 remaining) [2022-11-03 03:40:41,185 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr8ASSERT_VIOLATIONERROR_FUNCTION (14 of 40 remaining) [2022-11-03 03:40:41,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr11ASSERT_VIOLATIONERROR_FUNCTION (13 of 40 remaining) [2022-11-03 03:40:41,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr9ASSERT_VIOLATIONERROR_FUNCTION (12 of 40 remaining) [2022-11-03 03:40:41,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (11 of 40 remaining) [2022-11-03 03:40:41,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr1ASSERT_VIOLATIONERROR_FUNCTION (10 of 40 remaining) [2022-11-03 03:40:41,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr2ASSERT_VIOLATIONERROR_FUNCTION (9 of 40 remaining) [2022-11-03 03:40:41,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr4ASSERT_VIOLATIONERROR_FUNCTION (8 of 40 remaining) [2022-11-03 03:40:41,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr3ASSERT_VIOLATIONERROR_FUNCTION (7 of 40 remaining) [2022-11-03 03:40:41,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr5ASSERT_VIOLATIONERROR_FUNCTION (6 of 40 remaining) [2022-11-03 03:40:41,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr6ASSERT_VIOLATIONERROR_FUNCTION (5 of 40 remaining) [2022-11-03 03:40:41,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr7ASSERT_VIOLATIONERROR_FUNCTION (4 of 40 remaining) [2022-11-03 03:40:41,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr10ASSERT_VIOLATIONERROR_FUNCTION (3 of 40 remaining) [2022-11-03 03:40:41,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr8ASSERT_VIOLATIONERROR_FUNCTION (2 of 40 remaining) [2022-11-03 03:40:41,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr11ASSERT_VIOLATIONERROR_FUNCTION (1 of 40 remaining) [2022-11-03 03:40:41,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location worker_fnErr9ASSERT_VIOLATIONERROR_FUNCTION (0 of 40 remaining) [2022-11-03 03:40:41,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:40:41,191 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-11-03 03:40:41,204 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-03 03:40:41,204 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-03 03:40:41,264 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-03 03:40:41,269 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 03:40:41,270 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 654 places, 738 transitions, 1494 flow [2022-11-03 03:40:41,270 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 654 places, 738 transitions, 1494 flow [2022-11-03 03:40:41,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 654 places, 738 transitions, 1494 flow [2022-11-03 03:40:41,784 INFO L130 PetriNetUnfolder]: 159/1289 cut-off events. [2022-11-03 03:40:41,784 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-03 03:40:41,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1303 conditions, 1289 events. 159/1289 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 5763 event pairs, 0 based on Foata normal form. 0/1057 useless extension candidates. Maximal degree in co-relation 785. Up to 8 conditions per place. [2022-11-03 03:40:41,939 INFO L118 LiptonReduction]: Number of co-enabled transitions 297432 [2022-11-03 03:43:11,394 INFO L133 LiptonReduction]: Checked pairs total: 717400 [2022-11-03 03:43:11,394 INFO L135 LiptonReduction]: Total number of compositions: 784 [2022-11-03 03:43:11,395 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 189 places, 230 transitions, 478 flow [2022-11-03 03:43:17,834 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 218833 states, 215711 states have (on average 3.689450236659234) internal successors, (795855), 218832 states have internal predecessors, (795855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:17,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:43:17,835 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;@661b0d83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:43:17,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2022-11-03 03:43:18,184 INFO L276 IsEmpty]: Start isEmpty. Operand has 218833 states, 215711 states have (on average 3.689450236659234) internal successors, (795855), 218832 states have internal predecessors, (795855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-03 03:43:18,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:18,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-03 03:43:18,185 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 49 more)] === [2022-11-03 03:43:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:18,188 INFO L85 PathProgramCache]: Analyzing trace with hash 122997, now seen corresponding path program 1 times [2022-11-03 03:43:18,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:18,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429395850] [2022-11-03 03:43:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:18,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:18,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:18,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429395850] [2022-11-03 03:43:18,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429395850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:18,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:18,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 03:43:18,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549877516] [2022-11-03 03:43:18,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:18,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:43:18,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:18,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:43:18,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:43:18,435 INFO L87 Difference]: Start difference. First operand has 218833 states, 215711 states have (on average 3.689450236659234) internal successors, (795855), 218832 states have internal predecessors, (795855), 0 states have call successors, (0), 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 2 states, 1 states have (on average 2.0) 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) [2022-11-03 03:43:22,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:22,679 INFO L93 Difference]: Finished difference Result 218832 states and 731863 transitions. [2022-11-03 03:43:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:43:22,679 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) 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 [2022-11-03 03:43:22,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:24,849 INFO L225 Difference]: With dead ends: 218832 [2022-11-03 03:43:24,849 INFO L226 Difference]: Without dead ends: 218828 [2022-11-03 03:43:24,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:43:24,850 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:24,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:43:25,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218828 states. [2022-11-03 03:43:32,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218828 to 218828. [2022-11-03 03:43:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218828 states, 215711 states have (on average 3.392756975768505) internal successors, (731855), 218827 states have internal predecessors, (731855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:34,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218828 states to 218828 states and 731855 transitions. [2022-11-03 03:43:34,363 INFO L78 Accepts]: Start accepts. Automaton has 218828 states and 731855 transitions. Word has length 2 [2022-11-03 03:43:34,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:34,364 INFO L495 AbstractCegarLoop]: Abstraction has 218828 states and 731855 transitions. [2022-11-03 03:43:34,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) 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) [2022-11-03 03:43:34,364 INFO L276 IsEmpty]: Start isEmpty. Operand 218828 states and 731855 transitions. [2022-11-03 03:43:34,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 03:43:34,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:34,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 03:43:34,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:43:34,365 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 49 more)] === [2022-11-03 03:43:34,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:34,365 INFO L85 PathProgramCache]: Analyzing trace with hash -624066322, now seen corresponding path program 1 times [2022-11-03 03:43:34,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:34,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583840450] [2022-11-03 03:43:34,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:34,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:34,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:34,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583840450] [2022-11-03 03:43:34,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583840450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:34,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:34,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:43:34,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925397281] [2022-11-03 03:43:34,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:34,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:43:34,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:34,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:43:34,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:43:34,420 INFO L87 Difference]: Start difference. First operand 218828 states and 731855 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:37,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:37,657 INFO L93 Difference]: Finished difference Result 218829 states and 731856 transitions. [2022-11-03 03:43:37,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:43:37,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-03 03:43:37,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:39,055 INFO L225 Difference]: With dead ends: 218829 [2022-11-03 03:43:39,055 INFO L226 Difference]: Without dead ends: 218829 [2022-11-03 03:43:39,056 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 [2022-11-03 03:43:39,056 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:39,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 03:43:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218829 states. [2022-11-03 03:43:45,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218829 to 218829. [2022-11-03 03:43:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218829 states, 215712 states have (on average 3.392745883400089) internal successors, (731856), 218828 states have internal predecessors, (731856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218829 states to 218829 states and 731856 transitions. [2022-11-03 03:43:48,150 INFO L78 Accepts]: Start accepts. Automaton has 218829 states and 731856 transitions. Word has length 5 [2022-11-03 03:43:48,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:48,150 INFO L495 AbstractCegarLoop]: Abstraction has 218829 states and 731856 transitions. [2022-11-03 03:43:48,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:48,151 INFO L276 IsEmpty]: Start isEmpty. Operand 218829 states and 731856 transitions. [2022-11-03 03:43:48,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 03:43:48,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:48,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 03:43:48,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:43:48,152 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 49 more)] === [2022-11-03 03:43:48,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:48,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2030043218, now seen corresponding path program 1 times [2022-11-03 03:43:48,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:48,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934454656] [2022-11-03 03:43:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:48,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:48,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:48,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934454656] [2022-11-03 03:43:48,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934454656] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:43:48,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201088891] [2022-11-03 03:43:48,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:48,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:48,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:48,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:43:48,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fc04c86-4442-4965-b4a1-9516f65ae60b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:43:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:48,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:43:48,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:43:48,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:43:48,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201088891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:48,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:43:48,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-03 03:43:48,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590710239] [2022-11-03 03:43:48,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:48,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:43:48,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:48,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:43:48,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:43:48,386 INFO L87 Difference]: Start difference. First operand 218829 states and 731856 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)