./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/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_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/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_cdffeac2-b451-4409-9cf4-9bcd8ededa50/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 4c1c24b29e2a448aa58292c6eb9ff7da7a6479c4a0ee37fcfe55a998096eea30 --- 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 01:39:54,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:39:54,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:39:54,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:39:54,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:39:54,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:39:54,202 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:39:54,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:39:54,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:39:54,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:39:54,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:39:54,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:39:54,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:39:54,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:39:54,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:39:54,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:39:54,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:39:54,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:39:54,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:39:54,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:39:54,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:39:54,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:39:54,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:39:54,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:39:54,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:39:54,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:39:54,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:39:54,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:39:54,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:39:54,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:39:54,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:39:54,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:39:54,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:39:54,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:39:54,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:39:54,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:39:54,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:39:54,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:39:54,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:39:54,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:39:54,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:39:54,279 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:39:54,323 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:39:54,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:39:54,324 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:39:54,324 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:39:54,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:39:54,325 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:39:54,325 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:39:54,325 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:39:54,325 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:39:54,325 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:39:54,326 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:39:54,326 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:39:54,326 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:39:54,326 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:39:54,326 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:39:54,327 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:39:54,327 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:39:54,327 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:39:54,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:39:54,328 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:39:54,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:39:54,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:39:54,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:39:54,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:39:54,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:39:54,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:39:54,329 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:39:54,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:39:54,332 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:39:54,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:39:54,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:39:54,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:39:54,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:39:54,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:39:54,334 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:39:54,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:39:54,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:39:54,335 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:39:54,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:39:54,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:39:54,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:39:54,336 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_cdffeac2-b451-4409-9cf4-9bcd8ededa50/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c1c24b29e2a448aa58292c6eb9ff7da7a6479c4a0ee37fcfe55a998096eea30 [2022-11-03 01:39:54,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:39:54,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:39:54,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:39:54,670 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:39:54,671 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:39:54,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c [2022-11-03 01:39:54,755 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/data/d620668e2/a385d4d797b04658957aa6f59edeb975/FLAG218868ca7 [2022-11-03 01:39:55,191 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:39:55,192 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c [2022-11-03 01:39:55,199 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/data/d620668e2/a385d4d797b04658957aa6f59edeb975/FLAG218868ca7 [2022-11-03 01:39:55,224 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/data/d620668e2/a385d4d797b04658957aa6f59edeb975 [2022-11-03 01:39:55,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:39:55,228 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:39:55,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:39:55,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:39:55,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:39:55,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:39:55" (1/1) ... [2022-11-03 01:39:55,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b622a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:55, skipping insertion in model container [2022-11-03 01:39:55,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:39:55" (1/1) ... [2022-11-03 01:39:55,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:39:55,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:39:55,586 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_cdffeac2-b451-4409-9cf4-9bcd8ededa50/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c[2826,2839] [2022-11-03 01:39:55,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:39:55,601 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:39:55,639 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_cdffeac2-b451-4409-9cf4-9bcd8ededa50/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c[2826,2839] [2022-11-03 01:39:55,640 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:39:55,658 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:39:55,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:55 WrapperNode [2022-11-03 01:39:55,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:39:55,659 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:39:55,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:39:55,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:39:55,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:55" (1/1) ... [2022-11-03 01:39:55,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:55" (1/1) ... [2022-11-03 01:39:55,730 INFO L138 Inliner]: procedures = 25, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2022-11-03 01:39:55,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:39:55,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:39:55,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:39:55,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:39:55,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:55" (1/1) ... [2022-11-03 01:39:55,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:55" (1/1) ... [2022-11-03 01:39:55,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:55" (1/1) ... [2022-11-03 01:39:55,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:55" (1/1) ... [2022-11-03 01:39:55,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:55" (1/1) ... [2022-11-03 01:39:55,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:55" (1/1) ... [2022-11-03 01:39:55,772 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:55" (1/1) ... [2022-11-03 01:39:55,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:55" (1/1) ... [2022-11-03 01:39:55,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:39:55,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:39:55,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:39:55,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:39:55,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:55" (1/1) ... [2022-11-03 01:39:55,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:39:55,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:39:55,832 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:39:55,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:39:55,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:39:55,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:39:55,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:39:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:39:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-03 01:39:55,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-03 01:39:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-03 01:39:55,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-03 01:39:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-03 01:39:55,880 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-03 01:39:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-03 01:39:55,881 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-03 01:39:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:39:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-11-03 01:39:55,881 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-11-03 01:39:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-11-03 01:39:55,882 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-11-03 01:39:55,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:39:55,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:39:55,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:39:55,884 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 01:39:56,029 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:39:56,031 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:39:56,378 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:39:56,387 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:39:56,388 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-03 01:39:56,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:39:56 BoogieIcfgContainer [2022-11-03 01:39:56,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:39:56,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:39:56,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:39:56,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:39:56,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:39:55" (1/3) ... [2022-11-03 01:39:56,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b563e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:39:56, skipping insertion in model container [2022-11-03 01:39:56,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:55" (2/3) ... [2022-11-03 01:39:56,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b563e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:39:56, skipping insertion in model container [2022-11-03 01:39:56,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:39:56" (3/3) ... [2022-11-03 01:39:56,409 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp3x3-opt.wvr.c [2022-11-03 01:39:56,423 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-03 01:39:56,434 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:39:56,434 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:39:56,434 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-03 01:39:56,598 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-11-03 01:39:56,653 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 01:39:56,666 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 169 transitions, 386 flow [2022-11-03 01:39:56,669 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 169 transitions, 386 flow [2022-11-03 01:39:56,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 169 transitions, 386 flow [2022-11-03 01:39:56,800 INFO L130 PetriNetUnfolder]: 14/163 cut-off events. [2022-11-03 01:39:56,800 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-03 01:39:56,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 163 events. 14/163 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 77 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2022-11-03 01:39:56,826 INFO L118 LiptonReduction]: Number of co-enabled transitions 2916 [2022-11-03 01:40:06,384 INFO L133 LiptonReduction]: Checked pairs total: 3761 [2022-11-03 01:40:06,384 INFO L135 LiptonReduction]: Total number of compositions: 142 [2022-11-03 01:40:06,392 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 57 places, 44 transitions, 136 flow [2022-11-03 01:40:06,470 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 380 states, 379 states have (on average 5.58311345646438) internal successors, (2116), 379 states have internal predecessors, (2116), 0 states have call successors, (0), 0 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 01:40:06,490 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:40:06,503 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;@f6f61b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:40:06,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-03 01:40:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 380 states, 379 states have (on average 5.58311345646438) internal successors, (2116), 379 states have internal predecessors, (2116), 0 states have call successors, (0), 0 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 01:40:06,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 01:40:06,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:06,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:06,522 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-03 01:40:06,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:06,528 INFO L85 PathProgramCache]: Analyzing trace with hash -12196619, now seen corresponding path program 1 times [2022-11-03 01:40:06,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:06,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478885137] [2022-11-03 01:40:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:06,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:07,701 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 01:40:07,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:07,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478885137] [2022-11-03 01:40:07,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478885137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:07,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:07,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 01:40:07,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048228301] [2022-11-03 01:40:07,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:07,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:40:07,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:07,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:40:07,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:40:07,748 INFO L87 Difference]: Start difference. First operand has 380 states, 379 states have (on average 5.58311345646438) internal successors, (2116), 379 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 01:40:07,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:07,934 INFO L93 Difference]: Finished difference Result 745 states and 4197 transitions. [2022-11-03 01:40:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:40:07,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2022-11-03 01:40:07,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:07,957 INFO L225 Difference]: With dead ends: 745 [2022-11-03 01:40:07,957 INFO L226 Difference]: Without dead ends: 644 [2022-11-03 01:40:07,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:40:07,961 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:07,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:40:07,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-11-03 01:40:08,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 644. [2022-11-03 01:40:08,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 5.679626749611198) internal successors, (3652), 643 states have internal predecessors, (3652), 0 states have call successors, (0), 0 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 01:40:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 3652 transitions. [2022-11-03 01:40:08,050 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 3652 transitions. Word has length 31 [2022-11-03 01:40:08,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:08,051 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 3652 transitions. [2022-11-03 01:40:08,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 01:40:08,052 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 3652 transitions. [2022-11-03 01:40:08,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 01:40:08,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:08,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:08,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:40:08,058 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-03 01:40:08,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:08,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2106841551, now seen corresponding path program 1 times [2022-11-03 01:40:08,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:08,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115289248] [2022-11-03 01:40:08,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:08,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:08,363 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 01:40:08,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:08,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115289248] [2022-11-03 01:40:08,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115289248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:08,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808172456] [2022-11-03 01:40:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:08,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:08,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:08,370 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:08,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:40:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:08,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:40:08,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:40:08,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:08,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808172456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:08,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:40:08,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-11-03 01:40:08,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524428688] [2022-11-03 01:40:08,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:08,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:40:08,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:08,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:40:08,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:08,842 INFO L87 Difference]: Start difference. First operand 644 states and 3652 transitions. Second operand has 3 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 01:40:09,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:09,051 INFO L93 Difference]: Finished difference Result 1285 states and 7301 transitions. [2022-11-03 01:40:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:40:09,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2022-11-03 01:40:09,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:09,067 INFO L225 Difference]: With dead ends: 1285 [2022-11-03 01:40:09,067 INFO L226 Difference]: Without dead ends: 1232 [2022-11-03 01:40:09,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:09,069 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:09,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2022-11-03 01:40:09,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1232. [2022-11-03 01:40:09,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 5.703493095044679) internal successors, (7021), 1231 states have internal predecessors, (7021), 0 states have call successors, (0), 0 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 01:40:09,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 7021 transitions. [2022-11-03 01:40:09,195 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 7021 transitions. Word has length 32 [2022-11-03 01:40:09,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:09,196 INFO L495 AbstractCegarLoop]: Abstraction has 1232 states and 7021 transitions. [2022-11-03 01:40:09,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 01:40:09,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 7021 transitions. [2022-11-03 01:40:09,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 01:40:09,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:09,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:09,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:09,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:09,418 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-03 01:40:09,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:09,419 INFO L85 PathProgramCache]: Analyzing trace with hash 321162096, now seen corresponding path program 1 times [2022-11-03 01:40:09,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:09,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113456413] [2022-11-03 01:40:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:09,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:40:09,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:09,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113456413] [2022-11-03 01:40:09,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113456413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:09,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359047155] [2022-11-03 01:40:09,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:09,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:09,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:09,697 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:09,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:40:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:09,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:40:09,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:40:10,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:10,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359047155] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:10,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:40:10,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-11-03 01:40:10,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91424046] [2022-11-03 01:40:10,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:10,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:40:10,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:10,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:40:10,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:10,023 INFO L87 Difference]: Start difference. First operand 1232 states and 7021 transitions. Second operand has 3 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:10,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:10,170 INFO L93 Difference]: Finished difference Result 1773 states and 10230 transitions. [2022-11-03 01:40:10,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:40:10,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-03 01:40:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:10,183 INFO L225 Difference]: With dead ends: 1773 [2022-11-03 01:40:10,184 INFO L226 Difference]: Without dead ends: 1336 [2022-11-03 01:40:10,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:10,185 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:10,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:40:10,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2022-11-03 01:40:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1028. [2022-11-03 01:40:10,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 5.760467380720545) internal successors, (5916), 1027 states have internal predecessors, (5916), 0 states have call successors, (0), 0 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 01:40:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 5916 transitions. [2022-11-03 01:40:10,240 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 5916 transitions. Word has length 33 [2022-11-03 01:40:10,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:10,240 INFO L495 AbstractCegarLoop]: Abstraction has 1028 states and 5916 transitions. [2022-11-03 01:40:10,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:10,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 5916 transitions. [2022-11-03 01:40:10,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 01:40:10,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:10,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:10,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 01:40:10,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:10,458 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-03 01:40:10,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:10,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1814978428, now seen corresponding path program 1 times [2022-11-03 01:40:10,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:10,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448908986] [2022-11-03 01:40:10,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:10,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:40:10,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:10,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448908986] [2022-11-03 01:40:10,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448908986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:10,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910319066] [2022-11-03 01:40:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:10,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:10,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:10,694 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:10,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:40:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:10,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:40:10,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:40:10,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:10,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910319066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:10,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:40:10,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-11-03 01:40:10,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689736959] [2022-11-03 01:40:10,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:10,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:40:10,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:10,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:40:10,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:10,973 INFO L87 Difference]: Start difference. First operand 1028 states and 5916 transitions. Second operand has 3 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:11,121 INFO L93 Difference]: Finished difference Result 1877 states and 11057 transitions. [2022-11-03 01:40:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:40:11,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-03 01:40:11,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:11,138 INFO L225 Difference]: With dead ends: 1877 [2022-11-03 01:40:11,138 INFO L226 Difference]: Without dead ends: 1712 [2022-11-03 01:40:11,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:11,142 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:11,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:40:11,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-11-03 01:40:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1712. [2022-11-03 01:40:11,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1711 states have (on average 5.88135593220339) internal successors, (10063), 1711 states have internal predecessors, (10063), 0 states have call successors, (0), 0 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 01:40:11,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 10063 transitions. [2022-11-03 01:40:11,296 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 10063 transitions. Word has length 33 [2022-11-03 01:40:11,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:11,298 INFO L495 AbstractCegarLoop]: Abstraction has 1712 states and 10063 transitions. [2022-11-03 01:40:11,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:11,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 10063 transitions. [2022-11-03 01:40:11,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 01:40:11,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:11,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:11,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:11,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:11,538 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-03 01:40:11,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:11,539 INFO L85 PathProgramCache]: Analyzing trace with hash -136660125, now seen corresponding path program 1 times [2022-11-03 01:40:11,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:11,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567000914] [2022-11-03 01:40:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:11,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:11,874 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 01:40:11,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:11,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567000914] [2022-11-03 01:40:11,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567000914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:11,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228942791] [2022-11-03 01:40:11,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:11,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:11,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:11,877 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:11,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:40:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:12,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:40:12,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:12,207 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 01:40:12,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:12,280 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 01:40:12,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228942791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:12,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109428300] [2022-11-03 01:40:12,289 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 01:40:12,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:40:12,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-11-03 01:40:12,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715196737] [2022-11-03 01:40:12,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:12,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:40:12,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:12,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:40:12,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:12,292 INFO L87 Difference]: Start difference. First operand 1712 states and 10063 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 01:40:12,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:12,601 INFO L93 Difference]: Finished difference Result 2657 states and 15228 transitions. [2022-11-03 01:40:12,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:12,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 34 [2022-11-03 01:40:12,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:12,620 INFO L225 Difference]: With dead ends: 2657 [2022-11-03 01:40:12,620 INFO L226 Difference]: Without dead ends: 1950 [2022-11-03 01:40:12,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:12,622 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:12,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:12,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2022-11-03 01:40:12,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1460. [2022-11-03 01:40:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 5.884852638793694) internal successors, (8586), 1459 states have internal predecessors, (8586), 0 states have call successors, (0), 0 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 01:40:12,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 8586 transitions. [2022-11-03 01:40:12,699 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 8586 transitions. Word has length 34 [2022-11-03 01:40:12,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:12,700 INFO L495 AbstractCegarLoop]: Abstraction has 1460 states and 8586 transitions. [2022-11-03 01:40:12,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 01:40:12,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 8586 transitions. [2022-11-03 01:40:12,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 01:40:12,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:12,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:12,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:12,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:12,946 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-03 01:40:12,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:12,947 INFO L85 PathProgramCache]: Analyzing trace with hash 2086040763, now seen corresponding path program 1 times [2022-11-03 01:40:12,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:12,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840815611] [2022-11-03 01:40:12,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:12,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:40:13,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:13,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840815611] [2022-11-03 01:40:13,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840815611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:13,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:13,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:40:13,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124173644] [2022-11-03 01:40:13,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:13,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:40:13,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:13,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:40:13,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:40:13,241 INFO L87 Difference]: Start difference. First operand 1460 states and 8586 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 01:40:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:13,505 INFO L93 Difference]: Finished difference Result 1460 states and 8436 transitions. [2022-11-03 01:40:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:13,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2022-11-03 01:40:13,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:13,520 INFO L225 Difference]: With dead ends: 1460 [2022-11-03 01:40:13,520 INFO L226 Difference]: Without dead ends: 1310 [2022-11-03 01:40:13,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:13,523 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:13,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:13,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2022-11-03 01:40:13,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1310. [2022-11-03 01:40:13,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 5.859434682964094) internal successors, (7670), 1309 states have internal predecessors, (7670), 0 states have call successors, (0), 0 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 01:40:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 7670 transitions. [2022-11-03 01:40:13,588 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 7670 transitions. Word has length 34 [2022-11-03 01:40:13,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:13,589 INFO L495 AbstractCegarLoop]: Abstraction has 1310 states and 7670 transitions. [2022-11-03 01:40:13,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 01:40:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 7670 transitions. [2022-11-03 01:40:13,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 01:40:13,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:13,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:13,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:40:13,596 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-03 01:40:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:13,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1438051916, now seen corresponding path program 1 times [2022-11-03 01:40:13,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:13,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259196310] [2022-11-03 01:40:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:13,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:40:13,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:13,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259196310] [2022-11-03 01:40:13,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259196310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:13,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:13,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:40:13,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655825478] [2022-11-03 01:40:13,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:13,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:40:13,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:13,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:40:13,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:40:13,829 INFO L87 Difference]: Start difference. First operand 1310 states and 7670 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 01:40:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:14,075 INFO L93 Difference]: Finished difference Result 1310 states and 7436 transitions. [2022-11-03 01:40:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:14,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2022-11-03 01:40:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:14,088 INFO L225 Difference]: With dead ends: 1310 [2022-11-03 01:40:14,088 INFO L226 Difference]: Without dead ends: 1074 [2022-11-03 01:40:14,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:14,089 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:14,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:14,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-11-03 01:40:14,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1074. [2022-11-03 01:40:14,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 5.821062441752097) internal successors, (6246), 1073 states have internal predecessors, (6246), 0 states have call successors, (0), 0 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 01:40:14,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 6246 transitions. [2022-11-03 01:40:14,145 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 6246 transitions. Word has length 34 [2022-11-03 01:40:14,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:14,146 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 6246 transitions. [2022-11-03 01:40:14,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 01:40:14,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 6246 transitions. [2022-11-03 01:40:14,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 01:40:14,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:14,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:14,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 01:40:14,152 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-03 01:40:14,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:14,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1472236673, now seen corresponding path program 2 times [2022-11-03 01:40:14,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:14,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444104591] [2022-11-03 01:40:14,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:14,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:40:14,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:14,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444104591] [2022-11-03 01:40:14,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444104591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:14,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:14,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:40:14,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109904853] [2022-11-03 01:40:14,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:14,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:40:14,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:14,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:40:14,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:40:14,339 INFO L87 Difference]: Start difference. First operand 1074 states and 6246 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 01:40:14,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:14,574 INFO L93 Difference]: Finished difference Result 1458 states and 8582 transitions. [2022-11-03 01:40:14,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:14,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2022-11-03 01:40:14,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:14,586 INFO L225 Difference]: With dead ends: 1458 [2022-11-03 01:40:14,586 INFO L226 Difference]: Without dead ends: 1458 [2022-11-03 01:40:14,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:14,587 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:14,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:14,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2022-11-03 01:40:14,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1458. [2022-11-03 01:40:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 5.890185312285518) internal successors, (8582), 1457 states have internal predecessors, (8582), 0 states have call successors, (0), 0 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 01:40:14,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 8582 transitions. [2022-11-03 01:40:14,648 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 8582 transitions. Word has length 34 [2022-11-03 01:40:14,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:14,648 INFO L495 AbstractCegarLoop]: Abstraction has 1458 states and 8582 transitions. [2022-11-03 01:40:14,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 01:40:14,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 8582 transitions. [2022-11-03 01:40:14,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 01:40:14,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:14,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:14,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 01:40:14,656 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-03 01:40:14,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:14,656 INFO L85 PathProgramCache]: Analyzing trace with hash -510622656, now seen corresponding path program 2 times [2022-11-03 01:40:14,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:14,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720012728] [2022-11-03 01:40:14,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:14,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:14,906 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 01:40:14,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:14,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720012728] [2022-11-03 01:40:14,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720012728] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:14,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932641186] [2022-11-03 01:40:14,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:40:14,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:14,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:14,909 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:14,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:40:15,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:40:15,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:40:15,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:40:15,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:15,190 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 01:40:15,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:15,242 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 01:40:15,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932641186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:15,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1510723599] [2022-11-03 01:40:15,243 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 01:40:15,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:40:15,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-11-03 01:40:15,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963912134] [2022-11-03 01:40:15,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:15,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:40:15,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:15,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:40:15,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:15,248 INFO L87 Difference]: Start difference. First operand 1458 states and 8582 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 01:40:15,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:15,515 INFO L93 Difference]: Finished difference Result 1758 states and 10414 transitions. [2022-11-03 01:40:15,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:15,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 34 [2022-11-03 01:40:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:15,533 INFO L225 Difference]: With dead ends: 1758 [2022-11-03 01:40:15,533 INFO L226 Difference]: Without dead ends: 1758 [2022-11-03 01:40:15,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:15,535 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:15,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2022-11-03 01:40:15,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1758. [2022-11-03 01:40:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 5.927148548662493) internal successors, (10414), 1757 states have internal predecessors, (10414), 0 states have call successors, (0), 0 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 01:40:15,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 10414 transitions. [2022-11-03 01:40:15,618 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 10414 transitions. Word has length 34 [2022-11-03 01:40:15,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:15,618 INFO L495 AbstractCegarLoop]: Abstraction has 1758 states and 10414 transitions. [2022-11-03 01:40:15,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 01:40:15,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 10414 transitions. [2022-11-03 01:40:15,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 01:40:15,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:15,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:15,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:15,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 01:40:15,842 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-03 01:40:15,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:15,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1097538411, now seen corresponding path program 1 times [2022-11-03 01:40:15,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:15,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897513642] [2022-11-03 01:40:15,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:15,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:40:16,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:16,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897513642] [2022-11-03 01:40:16,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897513642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:16,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696292867] [2022-11-03 01:40:16,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:16,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:16,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:16,094 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:16,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:40:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:16,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:40:16,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:40:16,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:16,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696292867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:16,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:40:16,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-03 01:40:16,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297234830] [2022-11-03 01:40:16,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:16,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:40:16,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:16,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:40:16,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:16,305 INFO L87 Difference]: Start difference. First operand 1758 states and 10414 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 01:40:16,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:16,529 INFO L93 Difference]: Finished difference Result 2352 states and 13654 transitions. [2022-11-03 01:40:16,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:16,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2022-11-03 01:40:16,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:16,567 INFO L225 Difference]: With dead ends: 2352 [2022-11-03 01:40:16,567 INFO L226 Difference]: Without dead ends: 2048 [2022-11-03 01:40:16,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:40:16,568 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:16,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:16,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2022-11-03 01:40:16,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 2048. [2022-11-03 01:40:16,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 5.935026868588178) internal successors, (12149), 2047 states have internal predecessors, (12149), 0 states have call successors, (0), 0 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 01:40:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 12149 transitions. [2022-11-03 01:40:16,680 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 12149 transitions. Word has length 35 [2022-11-03 01:40:16,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:16,681 INFO L495 AbstractCegarLoop]: Abstraction has 2048 states and 12149 transitions. [2022-11-03 01:40:16,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 01:40:16,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 12149 transitions. [2022-11-03 01:40:16,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 01:40:16,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:16,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:16,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:16,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:16,907 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-03 01:40:16,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:16,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2003360111, now seen corresponding path program 2 times [2022-11-03 01:40:16,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:16,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314399006] [2022-11-03 01:40:16,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:16,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:40:17,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:17,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314399006] [2022-11-03 01:40:17,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314399006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:17,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810657067] [2022-11-03 01:40:17,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:40:17,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:17,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:17,134 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:17,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:40:17,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:40:17,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:40:17,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:40:17,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:40:17,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:40:17,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810657067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:17,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1559417615] [2022-11-03 01:40:17,512 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 01:40:17,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:40:17,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-11-03 01:40:17,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053820283] [2022-11-03 01:40:17,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:17,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:40:17,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:17,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:40:17,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:17,516 INFO L87 Difference]: Start difference. First operand 2048 states and 12149 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 01:40:17,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:17,798 INFO L93 Difference]: Finished difference Result 2592 states and 15475 transitions. [2022-11-03 01:40:17,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:17,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 35 [2022-11-03 01:40:17,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:17,816 INFO L225 Difference]: With dead ends: 2592 [2022-11-03 01:40:17,816 INFO L226 Difference]: Without dead ends: 2592 [2022-11-03 01:40:17,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:17,817 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:17,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:17,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2022-11-03 01:40:17,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2592. [2022-11-03 01:40:17,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 5.972597452720957) internal successors, (15475), 2591 states have internal predecessors, (15475), 0 states have call successors, (0), 0 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 01:40:17,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 15475 transitions. [2022-11-03 01:40:17,925 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 15475 transitions. Word has length 35 [2022-11-03 01:40:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:17,925 INFO L495 AbstractCegarLoop]: Abstraction has 2592 states and 15475 transitions. [2022-11-03 01:40:17,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 01:40:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 15475 transitions. [2022-11-03 01:40:17,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 01:40:17,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:17,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:17,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-03 01:40:18,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:18,156 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-03 01:40:18,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:18,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1131534523, now seen corresponding path program 1 times [2022-11-03 01:40:18,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:18,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650160644] [2022-11-03 01:40:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:18,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:40:18,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:18,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650160644] [2022-11-03 01:40:18,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650160644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:18,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258409833] [2022-11-03 01:40:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:18,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:18,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:18,506 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:18,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:40:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:18,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:40:18,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:40:18,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:40:18,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258409833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:18,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [712624321] [2022-11-03 01:40:18,866 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 01:40:18,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:40:18,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-11-03 01:40:18,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104474634] [2022-11-03 01:40:18,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:18,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:40:18,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:18,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:40:18,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:18,869 INFO L87 Difference]: Start difference. First operand 2592 states and 15475 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 01:40:19,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:19,161 INFO L93 Difference]: Finished difference Result 3565 states and 20986 transitions. [2022-11-03 01:40:19,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:19,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 36 [2022-11-03 01:40:19,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:19,181 INFO L225 Difference]: With dead ends: 3565 [2022-11-03 01:40:19,181 INFO L226 Difference]: Without dead ends: 2836 [2022-11-03 01:40:19,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:19,182 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:19,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2022-11-03 01:40:19,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2026. [2022-11-03 01:40:19,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 5.9427160493827165) internal successors, (12034), 2025 states have internal predecessors, (12034), 0 states have call successors, (0), 0 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 01:40:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 12034 transitions. [2022-11-03 01:40:19,282 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 12034 transitions. Word has length 36 [2022-11-03 01:40:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:19,283 INFO L495 AbstractCegarLoop]: Abstraction has 2026 states and 12034 transitions. [2022-11-03 01:40:19,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 01:40:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 12034 transitions. [2022-11-03 01:40:19,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 01:40:19,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:19,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:19,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:19,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 01:40:19,506 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-03 01:40:19,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:19,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2068051519, now seen corresponding path program 1 times [2022-11-03 01:40:19,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:19,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959383037] [2022-11-03 01:40:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:19,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:40:19,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:19,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959383037] [2022-11-03 01:40:19,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959383037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:19,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:19,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:40:19,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432854528] [2022-11-03 01:40:19,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:19,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:40:19,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:19,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:40:19,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:40:19,831 INFO L87 Difference]: Start difference. First operand 2026 states and 12034 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 01:40:20,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:20,083 INFO L93 Difference]: Finished difference Result 2836 states and 16732 transitions. [2022-11-03 01:40:20,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:20,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 01:40:20,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:20,105 INFO L225 Difference]: With dead ends: 2836 [2022-11-03 01:40:20,105 INFO L226 Difference]: Without dead ends: 2430 [2022-11-03 01:40:20,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:20,106 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:20,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:20,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2022-11-03 01:40:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 2430. [2022-11-03 01:40:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2430 states, 2429 states have (on average 5.970769864141622) internal successors, (14503), 2429 states have internal predecessors, (14503), 0 states have call successors, (0), 0 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 01:40:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 14503 transitions. [2022-11-03 01:40:20,221 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 14503 transitions. Word has length 36 [2022-11-03 01:40:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:20,221 INFO L495 AbstractCegarLoop]: Abstraction has 2430 states and 14503 transitions. [2022-11-03 01:40:20,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 01:40:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 14503 transitions. [2022-11-03 01:40:20,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 01:40:20,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:20,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:20,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 01:40:20,232 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-03 01:40:20,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:20,233 INFO L85 PathProgramCache]: Analyzing trace with hash 186612869, now seen corresponding path program 2 times [2022-11-03 01:40:20,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:20,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752615716] [2022-11-03 01:40:20,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:20,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:40:20,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:20,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752615716] [2022-11-03 01:40:20,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752615716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:20,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575185899] [2022-11-03 01:40:20,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:40:20,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:20,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:20,494 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:20,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:40:20,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:40:20,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:40:20,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:40:20,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:40:20,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:40:20,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575185899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:20,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952533420] [2022-11-03 01:40:20,908 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 01:40:20,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:40:20,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-11-03 01:40:20,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419405968] [2022-11-03 01:40:20,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:20,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:40:20,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:40:20,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:40:20,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:40:20,911 INFO L87 Difference]: Start difference. First operand 2430 states and 14503 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 01:40:21,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:21,254 INFO L93 Difference]: Finished difference Result 2914 states and 17497 transitions. [2022-11-03 01:40:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:40:21,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 36 [2022-11-03 01:40:21,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:21,274 INFO L225 Difference]: With dead ends: 2914 [2022-11-03 01:40:21,274 INFO L226 Difference]: Without dead ends: 2914 [2022-11-03 01:40:21,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:40:21,275 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:21,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:40:21,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2022-11-03 01:40:21,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 2914. [2022-11-03 01:40:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2914 states, 2913 states have (on average 6.00652248541023) internal successors, (17497), 2913 states have internal predecessors, (17497), 0 states have call successors, (0), 0 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 01:40:21,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2914 states to 2914 states and 17497 transitions. [2022-11-03 01:40:21,396 INFO L78 Accepts]: Start accepts. Automaton has 2914 states and 17497 transitions. Word has length 36 [2022-11-03 01:40:21,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:21,396 INFO L495 AbstractCegarLoop]: Abstraction has 2914 states and 17497 transitions. [2022-11-03 01:40:21,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 01:40:21,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2914 states and 17497 transitions. [2022-11-03 01:40:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 01:40:21,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:21,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:21,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:21,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 01:40:21,628 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-03 01:40:21,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:21,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1087932296, now seen corresponding path program 1 times [2022-11-03 01:40:21,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:21,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000617271] [2022-11-03 01:40:21,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:21,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:40:22,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:22,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000617271] [2022-11-03 01:40:22,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000617271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:22,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911653256] [2022-11-03 01:40:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:22,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:22,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:22,233 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:22,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdffeac2-b451-4409-9cf4-9bcd8ededa50/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:41:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:47,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:41:47,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:42:07,611 INFO L328 TraceCheckSpWp]: Computing backward predicates...