./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V --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 0d10bf8c0e842192a13f4b6638f03cf57668d5bee07d0b49c4b595de1c605066 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:13:22,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:13:22,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:13:22,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:13:22,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:13:22,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:13:22,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:13:22,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:13:22,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:13:22,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:13:22,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:13:22,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:13:22,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:13:22,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:13:22,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:13:22,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:13:22,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:13:22,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:13:22,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:13:22,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:13:22,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:13:22,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:13:22,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:13:22,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:13:22,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:13:22,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:13:22,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:13:22,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:13:22,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:13:22,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:13:22,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:13:22,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:13:22,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:13:22,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:13:22,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:13:22,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:13:22,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:13:22,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:13:22,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:13:22,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:13:22,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:13:22,361 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:13:22,410 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:13:22,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:13:22,411 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:13:22,411 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:13:22,412 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:13:22,412 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:13:22,413 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:13:22,413 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:13:22,413 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:13:22,413 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:13:22,414 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:13:22,414 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:13:22,414 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:13:22,414 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:13:22,415 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:13:22,415 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:13:22,415 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:13:22,415 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:13:22,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:13:22,417 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:13:22,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:13:22,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:13:22,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:13:22,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:13:22,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:13:22,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:13:22,418 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:13:22,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:13:22,419 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:13:22,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:13:22,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:13:22,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:13:22,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:13:22,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:13:22,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:13:22,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:13:22,421 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:13:22,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:13:22,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:13:22,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:13:22,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:13:22,422 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d10bf8c0e842192a13f4b6638f03cf57668d5bee07d0b49c4b595de1c605066 [2021-11-23 03:13:22,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:13:22,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:13:22,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:13:22,770 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:13:22,771 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:13:22,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c [2021-11-23 03:13:22,843 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/data/3c252472a/630a37cbc4a1452cb3689e6292f3bea6/FLAG8370e8629 [2021-11-23 03:13:23,371 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:13:23,372 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c [2021-11-23 03:13:23,379 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/data/3c252472a/630a37cbc4a1452cb3689e6292f3bea6/FLAG8370e8629 [2021-11-23 03:13:23,727 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/data/3c252472a/630a37cbc4a1452cb3689e6292f3bea6 [2021-11-23 03:13:23,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:13:23,731 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:13:23,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:13:23,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:13:23,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:13:23,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:13:23" (1/1) ... [2021-11-23 03:13:23,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18a9f044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:23, skipping insertion in model container [2021-11-23 03:13:23,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:13:23" (1/1) ... [2021-11-23 03:13:23,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:13:23,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:13:24,017 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_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c[2135,2148] [2021-11-23 03:13:24,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:13:24,032 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:13:24,056 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_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c[2135,2148] [2021-11-23 03:13:24,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:13:24,073 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:13:24,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:24 WrapperNode [2021-11-23 03:13:24,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:13:24,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:13:24,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:13:24,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:13:24,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:24" (1/1) ... [2021-11-23 03:13:24,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:24" (1/1) ... [2021-11-23 03:13:24,111 INFO L137 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-11-23 03:13:24,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:13:24,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:13:24,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:13:24,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:13:24,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:24" (1/1) ... [2021-11-23 03:13:24,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:24" (1/1) ... [2021-11-23 03:13:24,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:24" (1/1) ... [2021-11-23 03:13:24,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:24" (1/1) ... [2021-11-23 03:13:24,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:24" (1/1) ... [2021-11-23 03:13:24,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:24" (1/1) ... [2021-11-23 03:13:24,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:24" (1/1) ... [2021-11-23 03:13:24,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:13:24,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:13:24,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:13:24,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:13:24,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:24" (1/1) ... [2021-11-23 03:13:24,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:13:24,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:24,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:13:24,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:13:24,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:13:24,246 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-23 03:13:24,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-23 03:13:24,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-23 03:13:24,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-23 03:13:24,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-23 03:13:24,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-23 03:13:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:13:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:13:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:13:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:13:24,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:13:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:13:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:13:24,250 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-23 03:13:24,339 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:13:24,341 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:13:24,574 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:13:24,585 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:13:24,586 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 03:13:24,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:13:24 BoogieIcfgContainer [2021-11-23 03:13:24,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:13:24,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:13:24,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:13:24,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:13:24,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:13:23" (1/3) ... [2021-11-23 03:13:24,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a23a21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:13:24, skipping insertion in model container [2021-11-23 03:13:24,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:24" (2/3) ... [2021-11-23 03:13:24,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a23a21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:13:24, skipping insertion in model container [2021-11-23 03:13:24,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:13:24" (3/3) ... [2021-11-23 03:13:24,624 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.c [2021-11-23 03:13:24,629 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-23 03:13:24,629 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:13:24,629 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:13:24,629 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-23 03:13:24,665 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,666 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,666 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,667 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,667 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,667 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,668 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,668 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,668 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,668 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,669 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,669 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,669 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,669 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,670 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,670 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,670 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,670 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,671 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,671 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,672 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,672 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,672 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,672 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,673 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,673 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,674 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,675 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,675 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,675 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,675 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,676 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,676 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,676 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,676 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,677 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,677 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,677 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,678 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,678 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,678 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,679 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,679 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,679 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,679 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,680 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,680 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,680 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,680 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,681 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,681 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,681 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,681 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,681 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,682 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,682 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,685 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,686 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,686 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,686 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,690 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,690 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,690 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,691 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,692 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,692 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,692 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,693 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 03:13:24,697 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-23 03:13:24,745 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:13:24,753 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:13:24,753 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-23 03:13:24,771 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-23 03:13:24,785 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 107 transitions, 238 flow [2021-11-23 03:13:24,788 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 107 transitions, 238 flow [2021-11-23 03:13:24,790 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 238 flow [2021-11-23 03:13:24,857 INFO L129 PetriNetUnfolder]: 7/104 cut-off events. [2021-11-23 03:13:24,857 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-23 03:13:24,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 104 events. 7/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2021-11-23 03:13:24,866 INFO L116 LiptonReduction]: Number of co-enabled transitions 1320 [2021-11-23 03:13:27,813 INFO L131 LiptonReduction]: Checked pairs total: 1352 [2021-11-23 03:13:27,814 INFO L133 LiptonReduction]: Total number of compositions: 88 [2021-11-23 03:13:27,824 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-11-23 03:13:27,844 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 105 states have (on average 3.0952380952380953) internal successors, (325), 105 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:27,847 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 105 states have (on average 3.0952380952380953) internal successors, (325), 105 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:27,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 03:13:27,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:27,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:27,858 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:27,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:27,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1344266392, now seen corresponding path program 1 times [2021-11-23 03:13:27,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:27,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978465619] [2021-11-23 03:13:27,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:27,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:28,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:28,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978465619] [2021-11-23 03:13:28,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978465619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:28,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:28,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:13:28,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550797389] [2021-11-23 03:13:28,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:28,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:13:28,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:28,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:13:28,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:13:28,281 INFO L87 Difference]: Start difference. First operand has 106 states, 105 states have (on average 3.0952380952380953) internal successors, (325), 105 states have internal predecessors, (325), 0 states have call successors, (0), 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 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:28,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:28,395 INFO L93 Difference]: Finished difference Result 203 states and 630 transitions. [2021-11-23 03:13:28,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:13:28,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-11-23 03:13:28,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:28,419 INFO L225 Difference]: With dead ends: 203 [2021-11-23 03:13:28,420 INFO L226 Difference]: Without dead ends: 196 [2021-11-23 03:13:28,421 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:13:28,428 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:28,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:13:28,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-23 03:13:28,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-11-23 03:13:28,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 3.1384615384615384) internal successors, (612), 195 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:28,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 612 transitions. [2021-11-23 03:13:28,508 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 612 transitions. Word has length 19 [2021-11-23 03:13:28,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:28,509 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 612 transitions. [2021-11-23 03:13:28,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:28,510 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 612 transitions. [2021-11-23 03:13:28,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:13:28,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:28,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:28,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:13:28,515 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:28,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:28,516 INFO L85 PathProgramCache]: Analyzing trace with hash -463505624, now seen corresponding path program 1 times [2021-11-23 03:13:28,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:28,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319680458] [2021-11-23 03:13:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:28,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:28,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:28,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319680458] [2021-11-23 03:13:28,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319680458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:28,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:28,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:13:28,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162799278] [2021-11-23 03:13:28,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:28,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:13:28,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:28,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:13:28,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:13:28,712 INFO L87 Difference]: Start difference. First operand 196 states and 612 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:28,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:28,935 INFO L93 Difference]: Finished difference Result 310 states and 837 transitions. [2021-11-23 03:13:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:13:28,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-11-23 03:13:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:28,942 INFO L225 Difference]: With dead ends: 310 [2021-11-23 03:13:28,942 INFO L226 Difference]: Without dead ends: 238 [2021-11-23 03:13:28,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:13:28,946 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 42 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:28,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 16 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:13:28,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-23 03:13:28,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 206. [2021-11-23 03:13:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 3.102439024390244) internal successors, (636), 205 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:28,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 636 transitions. [2021-11-23 03:13:28,996 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 636 transitions. Word has length 20 [2021-11-23 03:13:28,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:28,997 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 636 transitions. [2021-11-23 03:13:28,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:28,998 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 636 transitions. [2021-11-23 03:13:29,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:13:29,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:29,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:29,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:13:29,010 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:29,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:29,011 INFO L85 PathProgramCache]: Analyzing trace with hash 628549412, now seen corresponding path program 2 times [2021-11-23 03:13:29,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:29,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755403604] [2021-11-23 03:13:29,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:29,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:29,212 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:29,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755403604] [2021-11-23 03:13:29,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755403604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:29,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:29,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:13:29,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121761658] [2021-11-23 03:13:29,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:29,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:13:29,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:29,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:13:29,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:13:29,218 INFO L87 Difference]: Start difference. First operand 206 states and 636 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:29,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:29,367 INFO L93 Difference]: Finished difference Result 300 states and 860 transitions. [2021-11-23 03:13:29,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:13:29,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-11-23 03:13:29,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:29,375 INFO L225 Difference]: With dead ends: 300 [2021-11-23 03:13:29,376 INFO L226 Difference]: Without dead ends: 280 [2021-11-23 03:13:29,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:13:29,377 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:29,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 16 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:13:29,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-23 03:13:29,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 226. [2021-11-23 03:13:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.2088888888888887) internal successors, (722), 225 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 722 transitions. [2021-11-23 03:13:29,401 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 722 transitions. Word has length 20 [2021-11-23 03:13:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:29,401 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 722 transitions. [2021-11-23 03:13:29,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:29,402 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 722 transitions. [2021-11-23 03:13:29,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:13:29,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:29,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:29,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:13:29,404 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:29,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:29,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2059588905, now seen corresponding path program 1 times [2021-11-23 03:13:29,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:29,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099546640] [2021-11-23 03:13:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:29,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:29,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:29,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099546640] [2021-11-23 03:13:29,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099546640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:29,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:29,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:13:29,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525805551] [2021-11-23 03:13:29,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:29,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:13:29,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:29,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:13:29,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:13:29,500 INFO L87 Difference]: Start difference. First operand 226 states and 722 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:29,593 INFO L93 Difference]: Finished difference Result 276 states and 846 transitions. [2021-11-23 03:13:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:13:29,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-11-23 03:13:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:29,599 INFO L225 Difference]: With dead ends: 276 [2021-11-23 03:13:29,599 INFO L226 Difference]: Without dead ends: 272 [2021-11-23 03:13:29,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:13:29,603 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:29,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 11 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:13:29,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-23 03:13:29,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 238. [2021-11-23 03:13:29,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 3.2236286919831225) internal successors, (764), 237 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 764 transitions. [2021-11-23 03:13:29,640 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 764 transitions. Word has length 20 [2021-11-23 03:13:29,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:29,640 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 764 transitions. [2021-11-23 03:13:29,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 764 transitions. [2021-11-23 03:13:29,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:13:29,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:29,642 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:29,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:13:29,643 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:29,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:29,644 INFO L85 PathProgramCache]: Analyzing trace with hash 757132451, now seen corresponding path program 1 times [2021-11-23 03:13:29,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:29,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944636401] [2021-11-23 03:13:29,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:29,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:29,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:29,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944636401] [2021-11-23 03:13:29,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944636401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:29,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:29,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:13:29,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455287090] [2021-11-23 03:13:29,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:29,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:13:29,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:29,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:13:29,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:13:29,743 INFO L87 Difference]: Start difference. First operand 238 states and 764 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:29,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:29,835 INFO L93 Difference]: Finished difference Result 312 states and 946 transitions. [2021-11-23 03:13:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:13:29,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-11-23 03:13:29,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:29,840 INFO L225 Difference]: With dead ends: 312 [2021-11-23 03:13:29,840 INFO L226 Difference]: Without dead ends: 302 [2021-11-23 03:13:29,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:13:29,841 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:29,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 11 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:13:29,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-23 03:13:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 258. [2021-11-23 03:13:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 3.2217898832684826) internal successors, (828), 257 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:29,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 828 transitions. [2021-11-23 03:13:29,857 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 828 transitions. Word has length 20 [2021-11-23 03:13:29,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:29,858 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 828 transitions. [2021-11-23 03:13:29,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:29,858 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 828 transitions. [2021-11-23 03:13:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:13:29,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:29,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:29,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:13:29,861 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:29,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:29,863 INFO L85 PathProgramCache]: Analyzing trace with hash -712040693, now seen corresponding path program 2 times [2021-11-23 03:13:29,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:29,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757615180] [2021-11-23 03:13:29,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:29,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:29,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:29,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757615180] [2021-11-23 03:13:29,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757615180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:29,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:29,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:13:29,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091086007] [2021-11-23 03:13:29,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:29,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:13:29,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:29,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:13:29,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:13:29,995 INFO L87 Difference]: Start difference. First operand 258 states and 828 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:30,082 INFO L93 Difference]: Finished difference Result 308 states and 954 transitions. [2021-11-23 03:13:30,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:13:30,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-11-23 03:13:30,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:30,087 INFO L225 Difference]: With dead ends: 308 [2021-11-23 03:13:30,091 INFO L226 Difference]: Without dead ends: 284 [2021-11-23 03:13:30,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:13:30,098 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:30,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 15 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:13:30,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-23 03:13:30,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 196. [2021-11-23 03:13:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 3.1384615384615384) internal successors, (612), 195 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 612 transitions. [2021-11-23 03:13:30,113 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 612 transitions. Word has length 20 [2021-11-23 03:13:30,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:30,113 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 612 transitions. [2021-11-23 03:13:30,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 612 transitions. [2021-11-23 03:13:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:13:30,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:30,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:30,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:13:30,116 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:30,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:30,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1619546183, now seen corresponding path program 2 times [2021-11-23 03:13:30,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:30,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720832610] [2021-11-23 03:13:30,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:30,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:30,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:30,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720832610] [2021-11-23 03:13:30,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720832610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:30,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:30,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:13:30,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153041324] [2021-11-23 03:13:30,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:30,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:13:30,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:30,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:13:30,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:13:30,224 INFO L87 Difference]: Start difference. First operand 196 states and 612 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:30,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:30,312 INFO L93 Difference]: Finished difference Result 224 states and 720 transitions. [2021-11-23 03:13:30,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:13:30,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-11-23 03:13:30,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:30,315 INFO L225 Difference]: With dead ends: 224 [2021-11-23 03:13:30,316 INFO L226 Difference]: Without dead ends: 224 [2021-11-23 03:13:30,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:13:30,317 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:30,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 15 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:13:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-23 03:13:30,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 164. [2021-11-23 03:13:30,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 3.165644171779141) internal successors, (516), 163 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 516 transitions. [2021-11-23 03:13:30,329 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 516 transitions. Word has length 20 [2021-11-23 03:13:30,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:30,330 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 516 transitions. [2021-11-23 03:13:30,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:30,330 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 516 transitions. [2021-11-23 03:13:30,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:13:30,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:30,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:30,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:13:30,332 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:30,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:30,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1910615734, now seen corresponding path program 1 times [2021-11-23 03:13:30,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:30,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107365952] [2021-11-23 03:13:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:30,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:30,446 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:30,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107365952] [2021-11-23 03:13:30,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107365952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:13:30,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683849062] [2021-11-23 03:13:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:30,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:30,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:30,455 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:30,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:13:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:30,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:13:30,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:30,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:30,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683849062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:30,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1366668879] [2021-11-23 03:13:30,937 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:13:30,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:13:30,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2021-11-23 03:13:30,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962404410] [2021-11-23 03:13:30,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:30,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:13:30,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:30,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:13:30,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:13:30,942 INFO L87 Difference]: Start difference. First operand 164 states and 516 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:31,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:31,507 INFO L93 Difference]: Finished difference Result 286 states and 876 transitions. [2021-11-23 03:13:31,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:13:31,508 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 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 21 [2021-11-23 03:13:31,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:31,511 INFO L225 Difference]: With dead ends: 286 [2021-11-23 03:13:31,511 INFO L226 Difference]: Without dead ends: 286 [2021-11-23 03:13:31,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:13:31,512 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 84 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:31,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 72 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:13:31,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-23 03:13:31,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 206. [2021-11-23 03:13:31,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 3.229268292682927) internal successors, (662), 205 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:31,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 662 transitions. [2021-11-23 03:13:31,525 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 662 transitions. Word has length 21 [2021-11-23 03:13:31,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:31,527 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 662 transitions. [2021-11-23 03:13:31,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 662 transitions. [2021-11-23 03:13:31,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:13:31,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:31,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:31,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:31,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:31,753 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:31,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:31,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1485223220, now seen corresponding path program 2 times [2021-11-23 03:13:31,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:31,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764370160] [2021-11-23 03:13:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:31,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:31,828 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:31,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764370160] [2021-11-23 03:13:31,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764370160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:31,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:31,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:13:31,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93524335] [2021-11-23 03:13:31,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:31,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:13:31,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:31,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:13:31,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:13:31,831 INFO L87 Difference]: Start difference. First operand 206 states and 662 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:31,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:31,955 INFO L93 Difference]: Finished difference Result 236 states and 747 transitions. [2021-11-23 03:13:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:13:31,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-11-23 03:13:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:31,959 INFO L225 Difference]: With dead ends: 236 [2021-11-23 03:13:31,959 INFO L226 Difference]: Without dead ends: 224 [2021-11-23 03:13:31,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:13:31,960 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:31,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 16 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:13:31,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-23 03:13:31,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 218. [2021-11-23 03:13:31,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 3.23963133640553) internal successors, (703), 217 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:31,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 703 transitions. [2021-11-23 03:13:31,973 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 703 transitions. Word has length 21 [2021-11-23 03:13:31,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:31,973 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 703 transitions. [2021-11-23 03:13:31,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:31,973 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 703 transitions. [2021-11-23 03:13:31,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:13:31,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:31,975 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:31,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:13:31,975 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:31,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:31,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1772224748, now seen corresponding path program 3 times [2021-11-23 03:13:31,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:31,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723919568] [2021-11-23 03:13:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:31,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:32,033 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:32,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723919568] [2021-11-23 03:13:32,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723919568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:32,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:32,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:13:32,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614345624] [2021-11-23 03:13:32,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:32,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:13:32,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:32,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:13:32,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:13:32,035 INFO L87 Difference]: Start difference. First operand 218 states and 703 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:32,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:32,168 INFO L93 Difference]: Finished difference Result 342 states and 1073 transitions. [2021-11-23 03:13:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:13:32,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-11-23 03:13:32,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:32,172 INFO L225 Difference]: With dead ends: 342 [2021-11-23 03:13:32,172 INFO L226 Difference]: Without dead ends: 330 [2021-11-23 03:13:32,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:13:32,173 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:32,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 14 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:13:32,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-23 03:13:32,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 234. [2021-11-23 03:13:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 3.3047210300429186) internal successors, (770), 233 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:32,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 770 transitions. [2021-11-23 03:13:32,187 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 770 transitions. Word has length 21 [2021-11-23 03:13:32,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:32,188 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 770 transitions. [2021-11-23 03:13:32,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:32,188 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 770 transitions. [2021-11-23 03:13:32,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:13:32,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:32,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:32,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:13:32,191 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:32,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:32,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1389309474, now seen corresponding path program 4 times [2021-11-23 03:13:32,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:32,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260209504] [2021-11-23 03:13:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:32,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:32,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:32,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260209504] [2021-11-23 03:13:32,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260209504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:32,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:32,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:13:32,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701344859] [2021-11-23 03:13:32,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:32,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:13:32,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:32,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:13:32,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:13:32,254 INFO L87 Difference]: Start difference. First operand 234 states and 770 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:32,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:32,407 INFO L93 Difference]: Finished difference Result 312 states and 944 transitions. [2021-11-23 03:13:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:13:32,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-11-23 03:13:32,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:32,410 INFO L225 Difference]: With dead ends: 312 [2021-11-23 03:13:32,411 INFO L226 Difference]: Without dead ends: 272 [2021-11-23 03:13:32,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:13:32,412 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:32,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:13:32,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-23 03:13:32,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 260. [2021-11-23 03:13:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.227799227799228) internal successors, (836), 259 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:32,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 836 transitions. [2021-11-23 03:13:32,426 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 836 transitions. Word has length 21 [2021-11-23 03:13:32,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:32,427 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 836 transitions. [2021-11-23 03:13:32,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:32,427 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 836 transitions. [2021-11-23 03:13:32,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:13:32,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:32,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:32,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:13:32,429 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:32,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:32,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1805862718, now seen corresponding path program 5 times [2021-11-23 03:13:32,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:32,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517854458] [2021-11-23 03:13:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:32,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:32,509 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:32,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517854458] [2021-11-23 03:13:32,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517854458] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:13:32,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600331954] [2021-11-23 03:13:32,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:13:32,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:32,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:32,511 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:32,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:13:32,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:13:32,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:13:32,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:13:32,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:32,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:32,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600331954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:32,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [440141823] [2021-11-23 03:13:32,828 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:13:32,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:13:32,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2021-11-23 03:13:32,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255029376] [2021-11-23 03:13:32,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:32,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:13:32,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:32,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:13:32,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:13:32,832 INFO L87 Difference]: Start difference. First operand 260 states and 836 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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) [2021-11-23 03:13:33,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:33,052 INFO L93 Difference]: Finished difference Result 374 states and 1222 transitions. [2021-11-23 03:13:33,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:13:33,053 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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 21 [2021-11-23 03:13:33,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:33,057 INFO L225 Difference]: With dead ends: 374 [2021-11-23 03:13:33,057 INFO L226 Difference]: Without dead ends: 374 [2021-11-23 03:13:33,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:13:33,058 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:33,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 23 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:13:33,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-23 03:13:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 262. [2021-11-23 03:13:33,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.2298850574712645) internal successors, (843), 261 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:33,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 843 transitions. [2021-11-23 03:13:33,074 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 843 transitions. Word has length 21 [2021-11-23 03:13:33,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:33,075 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 843 transitions. [2021-11-23 03:13:33,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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) [2021-11-23 03:13:33,075 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 843 transitions. [2021-11-23 03:13:33,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:13:33,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:33,077 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:33,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:33,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:33,292 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:33,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:33,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1358529870, now seen corresponding path program 6 times [2021-11-23 03:13:33,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:33,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539938522] [2021-11-23 03:13:33,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:33,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:33,363 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:33,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539938522] [2021-11-23 03:13:33,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539938522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:13:33,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711045537] [2021-11-23 03:13:33,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:13:33,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:33,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:33,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:33,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:13:33,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:13:33,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:13:33,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:13:33,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:33,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:33,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711045537] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:33,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [840067711] [2021-11-23 03:13:33,652 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:13:33,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:13:33,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-23 03:13:33,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827824544] [2021-11-23 03:13:33,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:33,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:13:33,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:33,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:13:33,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:13:33,656 INFO L87 Difference]: Start difference. First operand 262 states and 843 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2021-11-23 03:13:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:33,903 INFO L93 Difference]: Finished difference Result 316 states and 1025 transitions. [2021-11-23 03:13:33,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:13:33,904 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 21 [2021-11-23 03:13:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:33,907 INFO L225 Difference]: With dead ends: 316 [2021-11-23 03:13:33,908 INFO L226 Difference]: Without dead ends: 316 [2021-11-23 03:13:33,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:13:33,909 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 43 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:33,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 27 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:13:33,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-23 03:13:33,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 212. [2021-11-23 03:13:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 3.203791469194313) internal successors, (676), 211 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:33,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 676 transitions. [2021-11-23 03:13:33,922 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 676 transitions. Word has length 21 [2021-11-23 03:13:33,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:33,922 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 676 transitions. [2021-11-23 03:13:33,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2021-11-23 03:13:33,923 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 676 transitions. [2021-11-23 03:13:33,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:13:33,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:33,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:33,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:34,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 03:13:34,140 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:34,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:34,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1231807852, now seen corresponding path program 1 times [2021-11-23 03:13:34,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:34,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118836063] [2021-11-23 03:13:34,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:34,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:34,330 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:34,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118836063] [2021-11-23 03:13:34,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118836063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:13:34,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056425140] [2021-11-23 03:13:34,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:34,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:34,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:34,335 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:34,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:13:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:34,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 03:13:34,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:34,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:34,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056425140] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:34,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1070514674] [2021-11-23 03:13:34,852 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:13:34,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:13:34,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2021-11-23 03:13:34,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786158040] [2021-11-23 03:13:34,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:34,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:13:34,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:34,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:13:34,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:13:34,856 INFO L87 Difference]: Start difference. First operand 212 states and 676 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:35,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:35,154 INFO L93 Difference]: Finished difference Result 362 states and 1146 transitions. [2021-11-23 03:13:35,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:13:35,155 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 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 22 [2021-11-23 03:13:35,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:35,158 INFO L225 Difference]: With dead ends: 362 [2021-11-23 03:13:35,158 INFO L226 Difference]: Without dead ends: 348 [2021-11-23 03:13:35,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:13:35,160 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:35,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 27 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:13:35,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-23 03:13:35,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 266. [2021-11-23 03:13:35,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.3811320754716983) internal successors, (896), 265 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:35,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 896 transitions. [2021-11-23 03:13:35,174 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 896 transitions. Word has length 22 [2021-11-23 03:13:35,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:35,175 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 896 transitions. [2021-11-23 03:13:35,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:35,175 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 896 transitions. [2021-11-23 03:13:35,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:13:35,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:35,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:35,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:35,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 03:13:35,400 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:35,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:35,400 INFO L85 PathProgramCache]: Analyzing trace with hash -840466042, now seen corresponding path program 2 times [2021-11-23 03:13:35,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:35,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036991561] [2021-11-23 03:13:35,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:35,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:35,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:35,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036991561] [2021-11-23 03:13:35,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036991561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:13:35,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213145799] [2021-11-23 03:13:35,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:13:35,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:35,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:35,538 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:35,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:13:35,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:13:35,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:13:35,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 03:13:35,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:35,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:36,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213145799] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:36,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1244115556] [2021-11-23 03:13:36,030 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:13:36,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:13:36,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2021-11-23 03:13:36,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678061485] [2021-11-23 03:13:36,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:36,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:13:36,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:36,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:13:36,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:13:36,034 INFO L87 Difference]: Start difference. First operand 266 states and 896 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:36,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:36,390 INFO L93 Difference]: Finished difference Result 408 states and 1334 transitions. [2021-11-23 03:13:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:13:36,390 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 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 22 [2021-11-23 03:13:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:36,394 INFO L225 Difference]: With dead ends: 408 [2021-11-23 03:13:36,395 INFO L226 Difference]: Without dead ends: 394 [2021-11-23 03:13:36,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:13:36,396 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 48 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:36,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 25 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:13:36,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-23 03:13:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 308. [2021-11-23 03:13:36,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.462540716612378) internal successors, (1063), 307 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 1063 transitions. [2021-11-23 03:13:36,412 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 1063 transitions. Word has length 22 [2021-11-23 03:13:36,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:36,413 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 1063 transitions. [2021-11-23 03:13:36,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:36,413 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 1063 transitions. [2021-11-23 03:13:36,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:13:36,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:36,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:36,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:36,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:36,628 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:36,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:36,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1049316948, now seen corresponding path program 3 times [2021-11-23 03:13:36,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:36,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326352871] [2021-11-23 03:13:36,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:36,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:36,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:36,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326352871] [2021-11-23 03:13:36,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326352871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:13:36,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98588269] [2021-11-23 03:13:36,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:13:36,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:36,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:36,783 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:36,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:13:36,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:13:36,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:13:36,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 03:13:36,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:37,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:37,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98588269] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:37,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [604058201] [2021-11-23 03:13:37,241 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:13:37,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:13:37,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2021-11-23 03:13:37,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245307349] [2021-11-23 03:13:37,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:37,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:13:37,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:37,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:13:37,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:13:37,246 INFO L87 Difference]: Start difference. First operand 308 states and 1063 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:37,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:37,530 INFO L93 Difference]: Finished difference Result 466 states and 1557 transitions. [2021-11-23 03:13:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:13:37,530 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 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 22 [2021-11-23 03:13:37,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:37,535 INFO L225 Difference]: With dead ends: 466 [2021-11-23 03:13:37,535 INFO L226 Difference]: Without dead ends: 452 [2021-11-23 03:13:37,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:13:37,536 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:37,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 25 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:13:37,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-23 03:13:37,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 344. [2021-11-23 03:13:37,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.5364431486880465) internal successors, (1213), 343 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:37,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1213 transitions. [2021-11-23 03:13:37,555 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1213 transitions. Word has length 22 [2021-11-23 03:13:37,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:37,555 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1213 transitions. [2021-11-23 03:13:37,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:37,556 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1213 transitions. [2021-11-23 03:13:37,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:13:37,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:37,558 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:37,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:37,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 03:13:37,772 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:37,772 INFO L85 PathProgramCache]: Analyzing trace with hash -481827608, now seen corresponding path program 4 times [2021-11-23 03:13:37,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:37,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598797973] [2021-11-23 03:13:37,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:37,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:37,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:37,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598797973] [2021-11-23 03:13:37,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598797973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:13:37,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937612377] [2021-11-23 03:13:37,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:13:37,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:37,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:37,953 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:37,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:13:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:38,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 03:13:38,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:38,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:38,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937612377] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:38,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [710855123] [2021-11-23 03:13:38,448 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:13:38,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:13:38,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2021-11-23 03:13:38,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005041183] [2021-11-23 03:13:38,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:38,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 03:13:38,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:38,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 03:13:38,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:13:38,452 INFO L87 Difference]: Start difference. First operand 344 states and 1213 transitions. Second operand has 11 states, 10 states have (on average 5.5) internal successors, (55), 10 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) [2021-11-23 03:13:38,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:38,775 INFO L93 Difference]: Finished difference Result 498 states and 1683 transitions. [2021-11-23 03:13:38,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:13:38,775 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.5) internal successors, (55), 10 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 22 [2021-11-23 03:13:38,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:38,781 INFO L225 Difference]: With dead ends: 498 [2021-11-23 03:13:38,781 INFO L226 Difference]: Without dead ends: 484 [2021-11-23 03:13:38,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:13:38,782 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:38,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 30 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:13:38,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-23 03:13:38,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 400. [2021-11-23 03:13:38,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.5538847117794488) internal successors, (1418), 399 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1418 transitions. [2021-11-23 03:13:38,806 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1418 transitions. Word has length 22 [2021-11-23 03:13:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:38,807 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1418 transitions. [2021-11-23 03:13:38,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.5) internal successors, (55), 10 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) [2021-11-23 03:13:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1418 transitions. [2021-11-23 03:13:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:13:38,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:38,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:38,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:39,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 03:13:39,036 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:39,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:39,036 INFO L85 PathProgramCache]: Analyzing trace with hash 927785602, now seen corresponding path program 5 times [2021-11-23 03:13:39,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:39,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423199041] [2021-11-23 03:13:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:39,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:39,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:39,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423199041] [2021-11-23 03:13:39,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423199041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:13:39,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535729748] [2021-11-23 03:13:39,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:13:39,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:39,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:39,252 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:39,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:13:39,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:13:39,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:13:39,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 03:13:39,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:39,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:39,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535729748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:39,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1242196615] [2021-11-23 03:13:39,814 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:13:39,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:13:39,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2021-11-23 03:13:39,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005372488] [2021-11-23 03:13:39,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:39,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 03:13:39,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:39,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 03:13:39,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:13:39,816 INFO L87 Difference]: Start difference. First operand 400 states and 1418 transitions. Second operand has 11 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:40,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:40,129 INFO L93 Difference]: Finished difference Result 590 states and 2000 transitions. [2021-11-23 03:13:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:13:40,130 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 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 22 [2021-11-23 03:13:40,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:40,136 INFO L225 Difference]: With dead ends: 590 [2021-11-23 03:13:40,137 INFO L226 Difference]: Without dead ends: 576 [2021-11-23 03:13:40,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:13:40,138 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 74 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:40,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 28 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:13:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-23 03:13:40,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 452. [2021-11-23 03:13:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.5920177383592016) internal successors, (1620), 451 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1620 transitions. [2021-11-23 03:13:40,203 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1620 transitions. Word has length 22 [2021-11-23 03:13:40,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:40,204 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1620 transitions. [2021-11-23 03:13:40,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:40,204 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1620 transitions. [2021-11-23 03:13:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:13:40,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:40,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:40,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:40,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 03:13:40,424 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:40,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:40,424 INFO L85 PathProgramCache]: Analyzing trace with hash 817181446, now seen corresponding path program 6 times [2021-11-23 03:13:40,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:40,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611696019] [2021-11-23 03:13:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:40,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:40,562 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:40,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611696019] [2021-11-23 03:13:40,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611696019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:13:40,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079463431] [2021-11-23 03:13:40,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:13:40,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:40,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:40,568 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:40,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:13:40,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:13:40,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:13:40,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 03:13:40,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:40,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:41,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079463431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:41,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1621862564] [2021-11-23 03:13:41,010 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:13:41,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:13:41,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2021-11-23 03:13:41,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953830964] [2021-11-23 03:13:41,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:41,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:13:41,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:41,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:13:41,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:13:41,012 INFO L87 Difference]: Start difference. First operand 452 states and 1620 transitions. Second operand has 10 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:41,402 INFO L93 Difference]: Finished difference Result 594 states and 2058 transitions. [2021-11-23 03:13:41,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:13:41,403 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 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 22 [2021-11-23 03:13:41,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:41,409 INFO L225 Difference]: With dead ends: 594 [2021-11-23 03:13:41,409 INFO L226 Difference]: Without dead ends: 580 [2021-11-23 03:13:41,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:13:41,410 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:41,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 40 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:13:41,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-23 03:13:41,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 466. [2021-11-23 03:13:41,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.6559139784946235) internal successors, (1700), 465 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1700 transitions. [2021-11-23 03:13:41,437 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1700 transitions. Word has length 22 [2021-11-23 03:13:41,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:41,438 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 1700 transitions. [2021-11-23 03:13:41,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:41,438 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1700 transitions. [2021-11-23 03:13:41,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:13:41,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:41,441 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:41,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:41,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:41,664 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:41,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:41,664 INFO L85 PathProgramCache]: Analyzing trace with hash -137308790, now seen corresponding path program 7 times [2021-11-23 03:13:41,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:41,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255753484] [2021-11-23 03:13:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:41,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:41,753 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:41,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255753484] [2021-11-23 03:13:41,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255753484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:13:41,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902813578] [2021-11-23 03:13:41,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:13:41,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:41,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:41,755 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:41,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:13:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:41,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:13:41,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:41,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:42,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902813578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:42,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [706836843] [2021-11-23 03:13:42,119 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:13:42,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:13:42,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-11-23 03:13:42,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952438779] [2021-11-23 03:13:42,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:42,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:13:42,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:42,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:13:42,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:13:42,121 INFO L87 Difference]: Start difference. First operand 466 states and 1700 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:48,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:48,240 INFO L93 Difference]: Finished difference Result 1512 states and 4990 transitions. [2021-11-23 03:13:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-23 03:13:48,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 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 23 [2021-11-23 03:13:48,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:48,256 INFO L225 Difference]: With dead ends: 1512 [2021-11-23 03:13:48,257 INFO L226 Difference]: Without dead ends: 1492 [2021-11-23 03:13:48,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6240 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1928, Invalid=14584, Unknown=0, NotChecked=0, Total=16512 [2021-11-23 03:13:48,264 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 304 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:48,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 185 Invalid, 2817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2706 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 03:13:48,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-11-23 03:13:48,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 772. [2021-11-23 03:13:48,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.9766536964980546) internal successors, (3066), 771 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:48,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 3066 transitions. [2021-11-23 03:13:48,317 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 3066 transitions. Word has length 23 [2021-11-23 03:13:48,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:48,317 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 3066 transitions. [2021-11-23 03:13:48,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:48,318 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 3066 transitions. [2021-11-23 03:13:48,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:13:48,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:48,322 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:48,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:48,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:48,536 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:48,537 INFO L85 PathProgramCache]: Analyzing trace with hash -726849305, now seen corresponding path program 8 times [2021-11-23 03:13:48,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:48,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194069076] [2021-11-23 03:13:48,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:48,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:48,645 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:48,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194069076] [2021-11-23 03:13:48,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194069076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:13:48,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630054873] [2021-11-23 03:13:48,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:13:48,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:48,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:48,648 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:48,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 03:13:48,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:13:48,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:13:48,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:13:48,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:48,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:49,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630054873] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:49,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1917164021] [2021-11-23 03:13:49,007 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:13:49,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:13:49,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-23 03:13:49,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754715327] [2021-11-23 03:13:49,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:49,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:13:49,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:49,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:13:49,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:13:49,009 INFO L87 Difference]: Start difference. First operand 772 states and 3066 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:50,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:50,041 INFO L93 Difference]: Finished difference Result 1520 states and 5751 transitions. [2021-11-23 03:13:50,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:13:50,041 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 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 23 [2021-11-23 03:13:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:50,062 INFO L225 Difference]: With dead ends: 1520 [2021-11-23 03:13:50,063 INFO L226 Difference]: Without dead ends: 1496 [2021-11-23 03:13:50,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:13:50,064 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 149 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:50,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 64 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:13:50,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-11-23 03:13:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1024. [2021-11-23 03:13:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 4.13782991202346) internal successors, (4233), 1023 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 4233 transitions. [2021-11-23 03:13:50,179 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 4233 transitions. Word has length 23 [2021-11-23 03:13:50,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:50,181 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 4233 transitions. [2021-11-23 03:13:50,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:50,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 4233 transitions. [2021-11-23 03:13:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:13:50,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:50,190 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:50,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:50,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-23 03:13:50,405 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:50,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:50,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1731413455, now seen corresponding path program 9 times [2021-11-23 03:13:50,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:50,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550241372] [2021-11-23 03:13:50,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:50,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:50,533 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:50,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550241372] [2021-11-23 03:13:50,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550241372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:13:50,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801814131] [2021-11-23 03:13:50,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:13:50,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:50,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:50,540 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:50,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 03:13:50,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:13:50,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:13:50,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:13:50,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:50,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:50,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801814131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:50,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [465330286] [2021-11-23 03:13:50,912 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:13:50,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:13:50,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2021-11-23 03:13:50,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636884773] [2021-11-23 03:13:50,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:50,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:13:50,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:50,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:13:50,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:13:50,915 INFO L87 Difference]: Start difference. First operand 1024 states and 4233 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:51,949 INFO L93 Difference]: Finished difference Result 1884 states and 7098 transitions. [2021-11-23 03:13:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 03:13:51,949 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 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 23 [2021-11-23 03:13:51,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:51,972 INFO L225 Difference]: With dead ends: 1884 [2021-11-23 03:13:51,972 INFO L226 Difference]: Without dead ends: 1884 [2021-11-23 03:13:51,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2021-11-23 03:13:51,974 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:51,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 88 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:13:51,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-11-23 03:13:52,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1128. [2021-11-23 03:13:52,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 4.165927240461402) internal successors, (4695), 1127 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:52,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 4695 transitions. [2021-11-23 03:13:52,049 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 4695 transitions. Word has length 23 [2021-11-23 03:13:52,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:52,050 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 4695 transitions. [2021-11-23 03:13:52,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:52,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 4695 transitions. [2021-11-23 03:13:52,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:13:52,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:52,056 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:52,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:52,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:52,272 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:52,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:52,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1714628302, now seen corresponding path program 10 times [2021-11-23 03:13:52,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:52,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523370118] [2021-11-23 03:13:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:52,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:52,410 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:52,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523370118] [2021-11-23 03:13:52,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523370118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:13:52,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146845802] [2021-11-23 03:13:52,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:13:52,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:52,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:52,416 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:52,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 03:13:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:52,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:13:52,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:52,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:52,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146845802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:52,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1901955965] [2021-11-23 03:13:52,767 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:13:52,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:13:52,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2021-11-23 03:13:52,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092413126] [2021-11-23 03:13:52,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:52,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:13:52,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:52,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:13:52,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:13:52,770 INFO L87 Difference]: Start difference. First operand 1128 states and 4695 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:54,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:54,220 INFO L93 Difference]: Finished difference Result 2234 states and 8322 transitions. [2021-11-23 03:13:54,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 03:13:54,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 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 23 [2021-11-23 03:13:54,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:54,238 INFO L225 Difference]: With dead ends: 2234 [2021-11-23 03:13:54,239 INFO L226 Difference]: Without dead ends: 2198 [2021-11-23 03:13:54,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 03:13:54,240 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 194 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:54,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 72 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 03:13:54,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2198 states. [2021-11-23 03:13:54,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2198 to 1394. [2021-11-23 03:13:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 4.241923905240488) internal successors, (5909), 1393 states have internal predecessors, (5909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:54,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 5909 transitions. [2021-11-23 03:13:54,332 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 5909 transitions. Word has length 23 [2021-11-23 03:13:54,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:54,332 INFO L470 AbstractCegarLoop]: Abstraction has 1394 states and 5909 transitions. [2021-11-23 03:13:54,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:54,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 5909 transitions. [2021-11-23 03:13:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:13:54,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:54,339 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:54,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:54,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 03:13:54,568 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:13:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:54,568 INFO L85 PathProgramCache]: Analyzing trace with hash 17777995, now seen corresponding path program 11 times [2021-11-23 03:13:54,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:54,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050849881] [2021-11-23 03:13:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:54,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:54,663 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:54,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050849881] [2021-11-23 03:13:54,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050849881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:13:54,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911430381] [2021-11-23 03:13:54,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:13:54,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:54,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:54,671 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:54,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 03:13:54,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:13:54,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:13:54,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:13:54,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:54,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:13:55,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911430381] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:55,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [622601030] [2021-11-23 03:13:55,026 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:13:55,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:13:55,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2021-11-23 03:13:55,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117290474] [2021-11-23 03:13:55,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:55,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:13:55,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:55,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:13:55,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:13:55,028 INFO L87 Difference]: Start difference. First operand 1394 states and 5909 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:00,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:00,248 INFO L93 Difference]: Finished difference Result 4256 states and 15775 transitions. [2021-11-23 03:14:00,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-23 03:14:00,249 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 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 23 [2021-11-23 03:14:00,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:00,278 INFO L225 Difference]: With dead ends: 4256 [2021-11-23 03:14:00,278 INFO L226 Difference]: Without dead ends: 4114 [2021-11-23 03:14:00,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4470 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2125, Invalid=9865, Unknown=0, NotChecked=0, Total=11990 [2021-11-23 03:14:00,283 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 458 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 1825 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:00,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 177 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1825 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 03:14:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4114 states. [2021-11-23 03:14:00,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4114 to 1908. [2021-11-23 03:14:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1907 states have (on average 4.322496067121133) internal successors, (8243), 1907 states have internal predecessors, (8243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:00,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 8243 transitions. [2021-11-23 03:14:00,434 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 8243 transitions. Word has length 23 [2021-11-23 03:14:00,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:00,435 INFO L470 AbstractCegarLoop]: Abstraction has 1908 states and 8243 transitions. [2021-11-23 03:14:00,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:00,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 8243 transitions. [2021-11-23 03:14:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:00,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:00,445 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:00,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:00,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-23 03:14:00,672 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:00,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:00,672 INFO L85 PathProgramCache]: Analyzing trace with hash 151353233, now seen corresponding path program 12 times [2021-11-23 03:14:00,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:00,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570103968] [2021-11-23 03:14:00,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:00,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:00,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:00,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570103968] [2021-11-23 03:14:00,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570103968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:00,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123706589] [2021-11-23 03:14:00,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:14:00,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:00,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:00,789 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:00,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 03:14:00,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:14:00,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:00,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:00,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:00,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:01,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123706589] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:01,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [239197278] [2021-11-23 03:14:01,135 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:01,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:01,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-23 03:14:01,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278674694] [2021-11-23 03:14:01,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:01,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:14:01,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:01,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:14:01,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:14:01,137 INFO L87 Difference]: Start difference. First operand 1908 states and 8243 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:02,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:02,103 INFO L93 Difference]: Finished difference Result 3370 states and 13222 transitions. [2021-11-23 03:14:02,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 03:14:02,103 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 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 23 [2021-11-23 03:14:02,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:02,121 INFO L225 Difference]: With dead ends: 3370 [2021-11-23 03:14:02,121 INFO L226 Difference]: Without dead ends: 3340 [2021-11-23 03:14:02,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:14:02,122 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 195 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:02,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 79 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:14:02,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2021-11-23 03:14:02,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 2078. [2021-11-23 03:14:02,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 4.396726047183438) internal successors, (9132), 2077 states have internal predecessors, (9132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:02,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 9132 transitions. [2021-11-23 03:14:02,264 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 9132 transitions. Word has length 23 [2021-11-23 03:14:02,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:02,264 INFO L470 AbstractCegarLoop]: Abstraction has 2078 states and 9132 transitions. [2021-11-23 03:14:02,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:02,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 9132 transitions. [2021-11-23 03:14:02,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:02,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:02,276 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:02,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:02,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-23 03:14:02,504 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:02,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:02,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1879569964, now seen corresponding path program 13 times [2021-11-23 03:14:02,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:02,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037806475] [2021-11-23 03:14:02,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:02,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:02,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:02,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037806475] [2021-11-23 03:14:02,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037806475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:02,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358238397] [2021-11-23 03:14:02,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:14:02,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:02,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:02,615 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:02,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 03:14:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:02,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:02,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:02,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:02,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358238397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:02,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1361372890] [2021-11-23 03:14:02,943 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:02,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:02,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2021-11-23 03:14:02,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573603751] [2021-11-23 03:14:02,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:02,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:14:02,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:02,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:14:02,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:14:02,945 INFO L87 Difference]: Start difference. First operand 2078 states and 9132 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:03,764 INFO L93 Difference]: Finished difference Result 2896 states and 11397 transitions. [2021-11-23 03:14:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 03:14:03,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 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 23 [2021-11-23 03:14:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:03,779 INFO L225 Difference]: With dead ends: 2896 [2021-11-23 03:14:03,779 INFO L226 Difference]: Without dead ends: 2864 [2021-11-23 03:14:03,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2021-11-23 03:14:03,780 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 233 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:03,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 43 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:14:03,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2021-11-23 03:14:03,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 1914. [2021-11-23 03:14:03,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 4.2728698379508625) internal successors, (8174), 1913 states have internal predecessors, (8174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 8174 transitions. [2021-11-23 03:14:03,888 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 8174 transitions. Word has length 23 [2021-11-23 03:14:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:03,889 INFO L470 AbstractCegarLoop]: Abstraction has 1914 states and 8174 transitions. [2021-11-23 03:14:03,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:03,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 8174 transitions. [2021-11-23 03:14:03,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:03,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:03,897 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:03,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:04,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 03:14:04,111 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:04,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:04,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1290029449, now seen corresponding path program 14 times [2021-11-23 03:14:04,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:04,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941278244] [2021-11-23 03:14:04,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:04,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:04,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:04,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941278244] [2021-11-23 03:14:04,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941278244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:04,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694427230] [2021-11-23 03:14:04,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:14:04,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:04,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:04,252 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:04,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 03:14:04,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:14:04,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:04,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:04,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:04,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:04,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694427230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:04,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [849070905] [2021-11-23 03:14:04,582 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:04,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:04,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-11-23 03:14:04,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895755313] [2021-11-23 03:14:04,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:04,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:14:04,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:04,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:14:04,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:14:04,584 INFO L87 Difference]: Start difference. First operand 1914 states and 8174 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:05,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:05,364 INFO L93 Difference]: Finished difference Result 3092 states and 11931 transitions. [2021-11-23 03:14:05,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:14:05,364 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 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 23 [2021-11-23 03:14:05,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:05,380 INFO L225 Difference]: With dead ends: 3092 [2021-11-23 03:14:05,381 INFO L226 Difference]: Without dead ends: 3062 [2021-11-23 03:14:05,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:14:05,382 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 197 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:05,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 63 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:14:05,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-11-23 03:14:05,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 1924. [2021-11-23 03:14:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 4.253770150806032) internal successors, (8180), 1923 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 8180 transitions. [2021-11-23 03:14:05,520 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 8180 transitions. Word has length 23 [2021-11-23 03:14:05,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:05,520 INFO L470 AbstractCegarLoop]: Abstraction has 1924 states and 8180 transitions. [2021-11-23 03:14:05,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:05,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 8180 transitions. [2021-11-23 03:14:05,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:05,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:05,528 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:05,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:05,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 03:14:05,744 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash -932262394, now seen corresponding path program 15 times [2021-11-23 03:14:05,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:05,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594674745] [2021-11-23 03:14:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:05,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:05,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:05,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594674745] [2021-11-23 03:14:05,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594674745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:05,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730833370] [2021-11-23 03:14:05,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:14:05,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:05,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:05,886 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:05,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 03:14:05,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:14:05,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:05,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:05,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:06,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:06,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730833370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:06,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [162512425] [2021-11-23 03:14:06,186 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:06,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:06,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2021-11-23 03:14:06,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135404834] [2021-11-23 03:14:06,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:06,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:14:06,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:06,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:14:06,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:14:06,188 INFO L87 Difference]: Start difference. First operand 1924 states and 8180 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:06,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:06,834 INFO L93 Difference]: Finished difference Result 3574 states and 14002 transitions. [2021-11-23 03:14:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:14:06,835 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 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 23 [2021-11-23 03:14:06,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:06,847 INFO L225 Difference]: With dead ends: 3574 [2021-11-23 03:14:06,847 INFO L226 Difference]: Without dead ends: 3554 [2021-11-23 03:14:06,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:14:06,848 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 270 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:06,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 61 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:14:06,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3554 states. [2021-11-23 03:14:06,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3554 to 2268. [2021-11-23 03:14:06,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2268 states, 2267 states have (on average 4.385972651080723) internal successors, (9943), 2267 states have internal predecessors, (9943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 9943 transitions. [2021-11-23 03:14:06,985 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 9943 transitions. Word has length 23 [2021-11-23 03:14:06,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:06,985 INFO L470 AbstractCegarLoop]: Abstraction has 2268 states and 9943 transitions. [2021-11-23 03:14:06,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:06,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 9943 transitions. [2021-11-23 03:14:06,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:07,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:07,020 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:07,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:07,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 03:14:07,220 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:07,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:07,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1400811881, now seen corresponding path program 16 times [2021-11-23 03:14:07,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:07,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782860828] [2021-11-23 03:14:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:07,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:14:07,314 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:07,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782860828] [2021-11-23 03:14:07,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782860828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:07,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308531745] [2021-11-23 03:14:07,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:14:07,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:07,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:07,316 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:07,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 03:14:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:07,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:07,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:14:07,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:14:07,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308531745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:07,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1261031663] [2021-11-23 03:14:07,647 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:07,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:07,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2021-11-23 03:14:07,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820717390] [2021-11-23 03:14:07,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:07,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:14:07,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:07,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:14:07,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:14:07,649 INFO L87 Difference]: Start difference. First operand 2268 states and 9943 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-11-23 03:14:08,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:08,327 INFO L93 Difference]: Finished difference Result 3382 states and 13796 transitions. [2021-11-23 03:14:08,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:14:08,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 23 [2021-11-23 03:14:08,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:08,337 INFO L225 Difference]: With dead ends: 3382 [2021-11-23 03:14:08,337 INFO L226 Difference]: Without dead ends: 3362 [2021-11-23 03:14:08,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:14:08,338 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 128 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:08,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 57 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:14:08,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3362 states. [2021-11-23 03:14:08,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3362 to 2478. [2021-11-23 03:14:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 4.432781590633831) internal successors, (10980), 2477 states have internal predecessors, (10980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:08,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 10980 transitions. [2021-11-23 03:14:08,436 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 10980 transitions. Word has length 23 [2021-11-23 03:14:08,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:08,436 INFO L470 AbstractCegarLoop]: Abstraction has 2478 states and 10980 transitions. [2021-11-23 03:14:08,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-11-23 03:14:08,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 10980 transitions. [2021-11-23 03:14:08,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:08,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:08,446 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:08,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:08,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 03:14:08,646 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:08,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:08,647 INFO L85 PathProgramCache]: Analyzing trace with hash 613809418, now seen corresponding path program 17 times [2021-11-23 03:14:08,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:08,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119162847] [2021-11-23 03:14:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:08,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:08,750 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:08,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119162847] [2021-11-23 03:14:08,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119162847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:08,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673282570] [2021-11-23 03:14:08,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:14:08,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:08,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:08,751 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:08,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 03:14:08,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:14:08,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:08,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:08,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:08,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:09,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673282570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:09,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [451689293] [2021-11-23 03:14:09,099 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:09,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:09,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2021-11-23 03:14:09,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920455688] [2021-11-23 03:14:09,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:09,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:14:09,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:09,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:14:09,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:14:09,104 INFO L87 Difference]: Start difference. First operand 2478 states and 10980 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:09,950 INFO L93 Difference]: Finished difference Result 4676 states and 18800 transitions. [2021-11-23 03:14:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:14:09,950 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 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 23 [2021-11-23 03:14:09,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:09,961 INFO L225 Difference]: With dead ends: 4676 [2021-11-23 03:14:09,961 INFO L226 Difference]: Without dead ends: 4658 [2021-11-23 03:14:09,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:14:09,962 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 276 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:09,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 76 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:14:09,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4658 states. [2021-11-23 03:14:10,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4658 to 2488. [2021-11-23 03:14:10,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 4.439083232810615) internal successors, (11040), 2487 states have internal predecessors, (11040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 11040 transitions. [2021-11-23 03:14:10,095 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 11040 transitions. Word has length 23 [2021-11-23 03:14:10,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:10,096 INFO L470 AbstractCegarLoop]: Abstraction has 2488 states and 11040 transitions. [2021-11-23 03:14:10,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:10,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 11040 transitions. [2021-11-23 03:14:10,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:10,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:10,110 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:10,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:10,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:10,336 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:10,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:10,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1194557403, now seen corresponding path program 18 times [2021-11-23 03:14:10,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:10,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532856911] [2021-11-23 03:14:10,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:10,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:10,450 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:10,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532856911] [2021-11-23 03:14:10,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532856911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:10,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590751579] [2021-11-23 03:14:10,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:14:10,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:10,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:10,456 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:10,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 03:14:10,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:14:10,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:10,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:10,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:10,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:10,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590751579] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:10,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [267668571] [2021-11-23 03:14:10,784 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:10,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:10,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2021-11-23 03:14:10,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333115900] [2021-11-23 03:14:10,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:10,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:14:10,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:10,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:14:10,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:14:10,787 INFO L87 Difference]: Start difference. First operand 2488 states and 11040 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-11-23 03:14:11,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:11,688 INFO L93 Difference]: Finished difference Result 3142 states and 13299 transitions. [2021-11-23 03:14:11,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 03:14:11,688 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 23 [2021-11-23 03:14:11,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:11,696 INFO L225 Difference]: With dead ends: 3142 [2021-11-23 03:14:11,696 INFO L226 Difference]: Without dead ends: 3112 [2021-11-23 03:14:11,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:14:11,697 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 142 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:11,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 59 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:14:11,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-11-23 03:14:11,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2778. [2021-11-23 03:14:11,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2778 states, 2777 states have (on average 4.4375225063017645) internal successors, (12323), 2777 states have internal predecessors, (12323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 12323 transitions. [2021-11-23 03:14:11,810 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 12323 transitions. Word has length 23 [2021-11-23 03:14:11,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:11,810 INFO L470 AbstractCegarLoop]: Abstraction has 2778 states and 12323 transitions. [2021-11-23 03:14:11,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-11-23 03:14:11,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 12323 transitions. [2021-11-23 03:14:11,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:11,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:11,821 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:11,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:12,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:12,044 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:12,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:12,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1110532571, now seen corresponding path program 19 times [2021-11-23 03:14:12,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:12,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13941983] [2021-11-23 03:14:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:12,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:12,154 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:12,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13941983] [2021-11-23 03:14:12,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13941983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:12,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545430428] [2021-11-23 03:14:12,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:14:12,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:12,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:12,156 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:12,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 03:14:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:12,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:12,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:12,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:12,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545430428] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:12,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1404020007] [2021-11-23 03:14:12,469 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:12,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:12,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2021-11-23 03:14:12,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220376634] [2021-11-23 03:14:12,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:12,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:14:12,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:12,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:14:12,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:14:12,472 INFO L87 Difference]: Start difference. First operand 2778 states and 12323 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-11-23 03:14:13,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:13,390 INFO L93 Difference]: Finished difference Result 3848 states and 15878 transitions. [2021-11-23 03:14:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 03:14:13,391 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 23 [2021-11-23 03:14:13,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:13,401 INFO L225 Difference]: With dead ends: 3848 [2021-11-23 03:14:13,401 INFO L226 Difference]: Without dead ends: 3814 [2021-11-23 03:14:13,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:14:13,402 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 167 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:13,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 74 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:14:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3814 states. [2021-11-23 03:14:13,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3814 to 2850. [2021-11-23 03:14:13,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 2849 states have (on average 4.487539487539488) internal successors, (12785), 2849 states have internal predecessors, (12785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:13,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 12785 transitions. [2021-11-23 03:14:13,555 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 12785 transitions. Word has length 23 [2021-11-23 03:14:13,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:13,556 INFO L470 AbstractCegarLoop]: Abstraction has 2850 states and 12785 transitions. [2021-11-23 03:14:13,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-11-23 03:14:13,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 12785 transitions. [2021-11-23 03:14:13,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:13,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:13,566 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:13,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:13,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-23 03:14:13,783 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:13,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:13,784 INFO L85 PathProgramCache]: Analyzing trace with hash 554745893, now seen corresponding path program 20 times [2021-11-23 03:14:13,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:13,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070634621] [2021-11-23 03:14:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:13,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:13,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:13,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070634621] [2021-11-23 03:14:13,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070634621] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:13,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733032169] [2021-11-23 03:14:13,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:14:13,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:13,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:13,916 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:13,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 03:14:13,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:14:13,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:13,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:13,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:14,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:14,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733032169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:14,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1356383559] [2021-11-23 03:14:14,230 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:14,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:14,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2021-11-23 03:14:14,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118333591] [2021-11-23 03:14:14,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:14,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:14:14,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:14,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:14:14,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:14:14,232 INFO L87 Difference]: Start difference. First operand 2850 states and 12785 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-11-23 03:14:14,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:14,788 INFO L93 Difference]: Finished difference Result 3634 states and 15297 transitions. [2021-11-23 03:14:14,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:14:14,788 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 23 [2021-11-23 03:14:14,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:14,798 INFO L225 Difference]: With dead ends: 3634 [2021-11-23 03:14:14,798 INFO L226 Difference]: Without dead ends: 3620 [2021-11-23 03:14:14,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:14:14,800 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 165 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:14,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 58 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:14:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2021-11-23 03:14:14,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 2854. [2021-11-23 03:14:14,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2854 states, 2853 states have (on average 4.490361023484052) internal successors, (12811), 2853 states have internal predecessors, (12811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2854 states to 2854 states and 12811 transitions. [2021-11-23 03:14:14,977 INFO L78 Accepts]: Start accepts. Automaton has 2854 states and 12811 transitions. Word has length 23 [2021-11-23 03:14:14,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:14,977 INFO L470 AbstractCegarLoop]: Abstraction has 2854 states and 12811 transitions. [2021-11-23 03:14:14,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-11-23 03:14:14,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2854 states and 12811 transitions. [2021-11-23 03:14:14,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:14,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:14,989 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:15,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:15,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:15,212 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:15,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:15,212 INFO L85 PathProgramCache]: Analyzing trace with hash 161718883, now seen corresponding path program 21 times [2021-11-23 03:14:15,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:15,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302752857] [2021-11-23 03:14:15,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:15,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:15,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:15,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302752857] [2021-11-23 03:14:15,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302752857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:15,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564516228] [2021-11-23 03:14:15,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:14:15,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:15,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:15,340 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:15,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 03:14:15,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:14:15,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:15,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:15,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:15,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:15,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564516228] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:15,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [725979051] [2021-11-23 03:14:15,701 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:15,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:15,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2021-11-23 03:14:15,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006888650] [2021-11-23 03:14:15,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:15,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:14:15,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:15,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:14:15,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:14:15,703 INFO L87 Difference]: Start difference. First operand 2854 states and 12811 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:16,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:16,787 INFO L93 Difference]: Finished difference Result 4298 states and 17893 transitions. [2021-11-23 03:14:16,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 03:14:16,788 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 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 23 [2021-11-23 03:14:16,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:16,801 INFO L225 Difference]: With dead ends: 4298 [2021-11-23 03:14:16,801 INFO L226 Difference]: Without dead ends: 4276 [2021-11-23 03:14:16,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:14:16,802 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 195 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:16,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 70 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:14:16,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-11-23 03:14:16,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3016. [2021-11-23 03:14:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3016 states, 3015 states have (on average 4.500497512437811) internal successors, (13569), 3015 states have internal predecessors, (13569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 13569 transitions. [2021-11-23 03:14:16,916 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 13569 transitions. Word has length 23 [2021-11-23 03:14:16,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:16,916 INFO L470 AbstractCegarLoop]: Abstraction has 3016 states and 13569 transitions. [2021-11-23 03:14:16,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:16,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 13569 transitions. [2021-11-23 03:14:16,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:16,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:16,930 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:16,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:17,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-23 03:14:17,156 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:17,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:17,156 INFO L85 PathProgramCache]: Analyzing trace with hash -409467993, now seen corresponding path program 22 times [2021-11-23 03:14:17,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:17,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227421317] [2021-11-23 03:14:17,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:17,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:17,276 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:17,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227421317] [2021-11-23 03:14:17,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227421317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:17,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778077067] [2021-11-23 03:14:17,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:14:17,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:17,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:17,283 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:17,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 03:14:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:17,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:17,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:17,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:17,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778077067] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:17,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1124955597] [2021-11-23 03:14:17,568 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:17,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:17,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2021-11-23 03:14:17,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474222477] [2021-11-23 03:14:17,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:17,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:14:17,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:17,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:14:17,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:14:17,571 INFO L87 Difference]: Start difference. First operand 3016 states and 13569 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:18,321 INFO L93 Difference]: Finished difference Result 4506 states and 18538 transitions. [2021-11-23 03:14:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 03:14:18,322 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 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 23 [2021-11-23 03:14:18,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:18,333 INFO L225 Difference]: With dead ends: 4506 [2021-11-23 03:14:18,333 INFO L226 Difference]: Without dead ends: 4450 [2021-11-23 03:14:18,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:14:18,334 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 263 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:18,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 61 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:14:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2021-11-23 03:14:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3154. [2021-11-23 03:14:18,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3154 states, 3153 states have (on average 4.490960989533777) internal successors, (14160), 3153 states have internal predecessors, (14160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:18,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3154 states to 3154 states and 14160 transitions. [2021-11-23 03:14:18,434 INFO L78 Accepts]: Start accepts. Automaton has 3154 states and 14160 transitions. Word has length 23 [2021-11-23 03:14:18,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:18,434 INFO L470 AbstractCegarLoop]: Abstraction has 3154 states and 14160 transitions. [2021-11-23 03:14:18,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:18,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3154 states and 14160 transitions. [2021-11-23 03:14:18,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:18,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:18,447 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:18,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:18,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-23 03:14:18,675 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:18,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2016344360, now seen corresponding path program 23 times [2021-11-23 03:14:18,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:18,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628270413] [2021-11-23 03:14:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:18,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:18,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:18,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628270413] [2021-11-23 03:14:18,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628270413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:18,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615717315] [2021-11-23 03:14:18,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:14:18,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:18,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:18,780 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:18,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 03:14:18,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:14:18,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:18,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:18,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:14:18,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:14:19,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615717315] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:19,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1599380496] [2021-11-23 03:14:19,073 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:19,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:19,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2021-11-23 03:14:19,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128622446] [2021-11-23 03:14:19,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:19,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:14:19,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:19,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:14:19,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:14:19,076 INFO L87 Difference]: Start difference. First operand 3154 states and 14160 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:21,120 INFO L93 Difference]: Finished difference Result 5846 states and 24425 transitions. [2021-11-23 03:14:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-23 03:14:21,121 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 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 23 [2021-11-23 03:14:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:21,139 INFO L225 Difference]: With dead ends: 5846 [2021-11-23 03:14:21,139 INFO L226 Difference]: Without dead ends: 5718 [2021-11-23 03:14:21,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=394, Invalid=1958, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 03:14:21,141 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 199 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:21,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 116 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 03:14:21,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5718 states. [2021-11-23 03:14:21,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5718 to 4096. [2021-11-23 03:14:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4096 states, 4095 states have (on average 4.615628815628815) internal successors, (18901), 4095 states have internal predecessors, (18901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4096 states to 4096 states and 18901 transitions. [2021-11-23 03:14:21,353 INFO L78 Accepts]: Start accepts. Automaton has 4096 states and 18901 transitions. Word has length 23 [2021-11-23 03:14:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:21,353 INFO L470 AbstractCegarLoop]: Abstraction has 4096 states and 18901 transitions. [2021-11-23 03:14:21,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 4096 states and 18901 transitions. [2021-11-23 03:14:21,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:21,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:21,365 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:21,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:21,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-23 03:14:21,566 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:21,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:21,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1349794554, now seen corresponding path program 24 times [2021-11-23 03:14:21,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:21,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519514448] [2021-11-23 03:14:21,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:21,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:21,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:21,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519514448] [2021-11-23 03:14:21,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519514448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:21,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156961161] [2021-11-23 03:14:21,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:14:21,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:21,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:21,696 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:21,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 03:14:21,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:14:21,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:21,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:21,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:21,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:21,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156961161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:21,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1025591152] [2021-11-23 03:14:21,984 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:21,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:21,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2021-11-23 03:14:21,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944109689] [2021-11-23 03:14:21,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:21,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:14:21,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:21,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:14:21,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:14:21,986 INFO L87 Difference]: Start difference. First operand 4096 states and 18901 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:22,841 INFO L93 Difference]: Finished difference Result 6186 states and 26524 transitions. [2021-11-23 03:14:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 03:14:22,842 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 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 23 [2021-11-23 03:14:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:22,861 INFO L225 Difference]: With dead ends: 6186 [2021-11-23 03:14:22,861 INFO L226 Difference]: Without dead ends: 6086 [2021-11-23 03:14:22,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:14:22,862 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 208 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:22,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 77 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:14:22,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-11-23 03:14:23,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 4496. [2021-11-23 03:14:23,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4496 states, 4495 states have (on average 4.660511679644049) internal successors, (20949), 4495 states have internal predecessors, (20949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4496 states to 4496 states and 20949 transitions. [2021-11-23 03:14:23,089 INFO L78 Accepts]: Start accepts. Automaton has 4496 states and 20949 transitions. Word has length 23 [2021-11-23 03:14:23,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:23,090 INFO L470 AbstractCegarLoop]: Abstraction has 4496 states and 20949 transitions. [2021-11-23 03:14:23,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4496 states and 20949 transitions. [2021-11-23 03:14:23,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:23,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:23,111 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:23,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-23 03:14:23,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-23 03:14:23,328 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:23,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:23,328 INFO L85 PathProgramCache]: Analyzing trace with hash 250553158, now seen corresponding path program 25 times [2021-11-23 03:14:23,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:23,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051279961] [2021-11-23 03:14:23,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:23,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:23,415 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:23,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051279961] [2021-11-23 03:14:23,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051279961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:23,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376436105] [2021-11-23 03:14:23,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:14:23,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:23,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:23,417 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:23,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 03:14:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:23,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:23,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:23,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:23,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376436105] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:23,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1998962187] [2021-11-23 03:14:23,714 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:23,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:23,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-11-23 03:14:23,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116728267] [2021-11-23 03:14:23,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:23,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:14:23,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:23,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:14:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:14:23,720 INFO L87 Difference]: Start difference. First operand 4496 states and 20949 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:24,346 INFO L93 Difference]: Finished difference Result 5314 states and 23463 transitions. [2021-11-23 03:14:24,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:14:24,347 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 23 [2021-11-23 03:14:24,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:24,365 INFO L225 Difference]: With dead ends: 5314 [2021-11-23 03:14:24,365 INFO L226 Difference]: Without dead ends: 5186 [2021-11-23 03:14:24,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:14:24,366 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 114 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:24,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 92 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:14:24,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5186 states. [2021-11-23 03:14:24,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5186 to 4490. [2021-11-23 03:14:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4490 states, 4489 states have (on average 4.6787703274671415) internal successors, (21003), 4489 states have internal predecessors, (21003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4490 states to 4490 states and 21003 transitions. [2021-11-23 03:14:24,508 INFO L78 Accepts]: Start accepts. Automaton has 4490 states and 21003 transitions. Word has length 23 [2021-11-23 03:14:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:24,508 INFO L470 AbstractCegarLoop]: Abstraction has 4490 states and 21003 transitions. [2021-11-23 03:14:24,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:24,508 INFO L276 IsEmpty]: Start isEmpty. Operand 4490 states and 21003 transitions. [2021-11-23 03:14:24,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:24,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:24,564 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:24,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:24,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-23 03:14:24,764 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:24,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:24,765 INFO L85 PathProgramCache]: Analyzing trace with hash 879863174, now seen corresponding path program 26 times [2021-11-23 03:14:24,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:24,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661254144] [2021-11-23 03:14:24,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:24,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:24,879 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:24,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661254144] [2021-11-23 03:14:24,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661254144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:24,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512107804] [2021-11-23 03:14:24,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:14:24,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:24,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:24,882 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:24,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-23 03:14:24,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:14:24,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:24,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:24,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:25,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:25,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512107804] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:25,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [177741464] [2021-11-23 03:14:25,257 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:25,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:25,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-11-23 03:14:25,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389204868] [2021-11-23 03:14:25,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:25,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:14:25,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:25,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:14:25,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:14:25,259 INFO L87 Difference]: Start difference. First operand 4490 states and 21003 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-11-23 03:14:26,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:26,146 INFO L93 Difference]: Finished difference Result 6434 states and 27003 transitions. [2021-11-23 03:14:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 03:14:26,146 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 23 [2021-11-23 03:14:26,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:26,166 INFO L225 Difference]: With dead ends: 6434 [2021-11-23 03:14:26,167 INFO L226 Difference]: Without dead ends: 6332 [2021-11-23 03:14:26,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:14:26,171 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 248 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:26,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 80 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:14:26,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6332 states. [2021-11-23 03:14:26,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6332 to 4004. [2021-11-23 03:14:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4004 states, 4003 states have (on average 4.587309517861604) internal successors, (18363), 4003 states have internal predecessors, (18363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4004 states to 4004 states and 18363 transitions. [2021-11-23 03:14:26,319 INFO L78 Accepts]: Start accepts. Automaton has 4004 states and 18363 transitions. Word has length 23 [2021-11-23 03:14:26,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:26,319 INFO L470 AbstractCegarLoop]: Abstraction has 4004 states and 18363 transitions. [2021-11-23 03:14:26,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-11-23 03:14:26,319 INFO L276 IsEmpty]: Start isEmpty. Operand 4004 states and 18363 transitions. [2021-11-23 03:14:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:26,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:26,329 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:26,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:26,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-23 03:14:26,529 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:26,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:26,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1502515437, now seen corresponding path program 27 times [2021-11-23 03:14:26,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:26,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929876781] [2021-11-23 03:14:26,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:26,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:26,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:26,616 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:26,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929876781] [2021-11-23 03:14:26,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929876781] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:26,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659651230] [2021-11-23 03:14:26,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:14:26,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:26,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:26,618 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:26,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 03:14:26,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:14:26,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:26,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:26,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:26,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:26,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659651230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:26,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1040065509] [2021-11-23 03:14:26,908 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:26,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:26,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2021-11-23 03:14:26,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264528928] [2021-11-23 03:14:26,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:26,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:14:26,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:26,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:14:26,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:14:26,911 INFO L87 Difference]: Start difference. First operand 4004 states and 18363 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:27,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:27,469 INFO L93 Difference]: Finished difference Result 4722 states and 20587 transitions. [2021-11-23 03:14:27,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:14:27,470 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 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 23 [2021-11-23 03:14:27,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:27,482 INFO L225 Difference]: With dead ends: 4722 [2021-11-23 03:14:27,482 INFO L226 Difference]: Without dead ends: 4678 [2021-11-23 03:14:27,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:14:27,483 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 220 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:27,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 70 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:14:27,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-11-23 03:14:27,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 4034. [2021-11-23 03:14:27,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4034 states, 4033 states have (on average 4.572030746342673) internal successors, (18439), 4033 states have internal predecessors, (18439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4034 states to 4034 states and 18439 transitions. [2021-11-23 03:14:27,630 INFO L78 Accepts]: Start accepts. Automaton has 4034 states and 18439 transitions. Word has length 23 [2021-11-23 03:14:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:27,631 INFO L470 AbstractCegarLoop]: Abstraction has 4034 states and 18439 transitions. [2021-11-23 03:14:27,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4034 states and 18439 transitions. [2021-11-23 03:14:27,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:27,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:27,646 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:27,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:27,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-23 03:14:27,859 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:27,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:27,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1418490605, now seen corresponding path program 28 times [2021-11-23 03:14:27,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:27,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000725184] [2021-11-23 03:14:27,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:27,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:27,990 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:27,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000725184] [2021-11-23 03:14:27,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000725184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:27,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307237626] [2021-11-23 03:14:27,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:14:27,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:27,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:27,996 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:28,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-23 03:14:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:28,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:28,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:28,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:28,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307237626] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:28,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1472190175] [2021-11-23 03:14:28,324 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:28,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:28,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2021-11-23 03:14:28,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143255878] [2021-11-23 03:14:28,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:28,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:14:28,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:28,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:14:28,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:14:28,326 INFO L87 Difference]: Start difference. First operand 4034 states and 18439 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:29,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:29,576 INFO L93 Difference]: Finished difference Result 5900 states and 24810 transitions. [2021-11-23 03:14:29,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 03:14:29,577 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 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 23 [2021-11-23 03:14:29,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:29,604 INFO L225 Difference]: With dead ends: 5900 [2021-11-23 03:14:29,605 INFO L226 Difference]: Without dead ends: 5824 [2021-11-23 03:14:29,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2021-11-23 03:14:29,610 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 259 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:29,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 79 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:14:29,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5824 states. [2021-11-23 03:14:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5824 to 4084. [2021-11-23 03:14:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4084 states, 4083 states have (on average 4.6061719324026456) internal successors, (18807), 4083 states have internal predecessors, (18807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:29,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4084 states to 4084 states and 18807 transitions. [2021-11-23 03:14:29,846 INFO L78 Accepts]: Start accepts. Automaton has 4084 states and 18807 transitions. Word has length 23 [2021-11-23 03:14:29,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:29,846 INFO L470 AbstractCegarLoop]: Abstraction has 4084 states and 18807 transitions. [2021-11-23 03:14:29,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:29,847 INFO L276 IsEmpty]: Start isEmpty. Operand 4084 states and 18807 transitions. [2021-11-23 03:14:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:29,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:29,863 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:29,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:30,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:30,092 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:30,092 INFO L85 PathProgramCache]: Analyzing trace with hash 246787859, now seen corresponding path program 29 times [2021-11-23 03:14:30,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:30,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709486243] [2021-11-23 03:14:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:30,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:30,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:30,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709486243] [2021-11-23 03:14:30,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709486243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:30,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487295433] [2021-11-23 03:14:30,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:14:30,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:30,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:30,244 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:30,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-23 03:14:30,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:14:30,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:30,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:30,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:30,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:30,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487295433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:30,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1777141504] [2021-11-23 03:14:30,580 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:30,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:30,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2021-11-23 03:14:30,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721332857] [2021-11-23 03:14:30,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:30,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:14:30,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:30,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:14:30,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:14:30,584 INFO L87 Difference]: Start difference. First operand 4084 states and 18807 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:31,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:31,387 INFO L93 Difference]: Finished difference Result 5738 states and 24492 transitions. [2021-11-23 03:14:31,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:14:31,388 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 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 23 [2021-11-23 03:14:31,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:31,406 INFO L225 Difference]: With dead ends: 5738 [2021-11-23 03:14:31,406 INFO L226 Difference]: Without dead ends: 5720 [2021-11-23 03:14:31,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:14:31,407 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 247 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:31,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 70 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:14:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5720 states. [2021-11-23 03:14:31,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5720 to 3988. [2021-11-23 03:14:31,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3987 states have (on average 4.581640331075997) internal successors, (18267), 3987 states have internal predecessors, (18267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 18267 transitions. [2021-11-23 03:14:31,625 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 18267 transitions. Word has length 23 [2021-11-23 03:14:31,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:31,626 INFO L470 AbstractCegarLoop]: Abstraction has 3988 states and 18267 transitions. [2021-11-23 03:14:31,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:31,626 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 18267 transitions. [2021-11-23 03:14:31,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:31,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:31,639 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:31,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-23 03:14:31,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:31,852 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:31,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:31,852 INFO L85 PathProgramCache]: Analyzing trace with hash -146239151, now seen corresponding path program 30 times [2021-11-23 03:14:31,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:31,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413052831] [2021-11-23 03:14:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:31,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:31,952 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:31,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413052831] [2021-11-23 03:14:31,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413052831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:31,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946166904] [2021-11-23 03:14:31,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:14:31,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:31,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:31,954 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:31,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-23 03:14:32,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:14:32,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:32,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:32,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:32,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:32,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946166904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:32,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [114146325] [2021-11-23 03:14:32,250 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:32,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:32,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2021-11-23 03:14:32,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316675354] [2021-11-23 03:14:32,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:32,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:14:32,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:32,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:14:32,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:14:32,252 INFO L87 Difference]: Start difference. First operand 3988 states and 18267 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 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) [2021-11-23 03:14:35,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:35,909 INFO L93 Difference]: Finished difference Result 8026 states and 32702 transitions. [2021-11-23 03:14:35,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-23 03:14:35,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 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 23 [2021-11-23 03:14:35,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:35,935 INFO L225 Difference]: With dead ends: 8026 [2021-11-23 03:14:35,935 INFO L226 Difference]: Without dead ends: 7986 [2021-11-23 03:14:35,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=845, Invalid=3711, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 03:14:35,938 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 320 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:35,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 115 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 03:14:35,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7986 states. [2021-11-23 03:14:36,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7986 to 4526. [2021-11-23 03:14:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4526 states, 4525 states have (on average 4.64) internal successors, (20996), 4525 states have internal predecessors, (20996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:36,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4526 states to 4526 states and 20996 transitions. [2021-11-23 03:14:36,143 INFO L78 Accepts]: Start accepts. Automaton has 4526 states and 20996 transitions. Word has length 23 [2021-11-23 03:14:36,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:36,143 INFO L470 AbstractCegarLoop]: Abstraction has 4526 states and 20996 transitions. [2021-11-23 03:14:36,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 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) [2021-11-23 03:14:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4526 states and 20996 transitions. [2021-11-23 03:14:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:36,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:36,159 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:36,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:36,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-23 03:14:36,364 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:36,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:36,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1875813741, now seen corresponding path program 31 times [2021-11-23 03:14:36,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:36,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540611408] [2021-11-23 03:14:36,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:36,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:36,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:36,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:36,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540611408] [2021-11-23 03:14:36,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540611408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:36,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333862512] [2021-11-23 03:14:36,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:14:36,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:36,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:36,467 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:36,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 03:14:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:36,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:36,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:36,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:36,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333862512] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:36,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1527257435] [2021-11-23 03:14:36,797 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:36,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:36,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2021-11-23 03:14:36,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006527187] [2021-11-23 03:14:36,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:36,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:14:36,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:36,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:14:36,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:14:36,799 INFO L87 Difference]: Start difference. First operand 4526 states and 20996 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:37,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:37,341 INFO L93 Difference]: Finished difference Result 5004 states and 22507 transitions. [2021-11-23 03:14:37,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:14:37,342 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 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 23 [2021-11-23 03:14:37,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:37,358 INFO L225 Difference]: With dead ends: 5004 [2021-11-23 03:14:37,358 INFO L226 Difference]: Without dead ends: 4876 [2021-11-23 03:14:37,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:14:37,359 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 139 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:37,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 78 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:14:37,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2021-11-23 03:14:37,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 4440. [2021-11-23 03:14:37,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4440 states, 4439 states have (on average 4.657580536156792) internal successors, (20675), 4439 states have internal predecessors, (20675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:37,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4440 states to 4440 states and 20675 transitions. [2021-11-23 03:14:37,521 INFO L78 Accepts]: Start accepts. Automaton has 4440 states and 20675 transitions. Word has length 23 [2021-11-23 03:14:37,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:37,521 INFO L470 AbstractCegarLoop]: Abstraction has 4440 states and 20675 transitions. [2021-11-23 03:14:37,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:37,522 INFO L276 IsEmpty]: Start isEmpty. Operand 4440 states and 20675 transitions. [2021-11-23 03:14:37,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:37,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:37,532 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:37,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:37,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:37,733 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:37,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:37,734 INFO L85 PathProgramCache]: Analyzing trace with hash 197655461, now seen corresponding path program 32 times [2021-11-23 03:14:37,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:37,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450556611] [2021-11-23 03:14:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:37,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:37,821 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:37,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450556611] [2021-11-23 03:14:37,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450556611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:37,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263876437] [2021-11-23 03:14:37,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:14:37,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:37,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:37,827 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:37,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-23 03:14:37,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:14:37,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:37,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:37,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:14:38,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:14:38,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263876437] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:38,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1716121951] [2021-11-23 03:14:38,183 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:38,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:38,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2021-11-23 03:14:38,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977271919] [2021-11-23 03:14:38,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:38,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:14:38,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:38,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:14:38,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:14:38,185 INFO L87 Difference]: Start difference. First operand 4440 states and 20675 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) [2021-11-23 03:14:41,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:41,613 INFO L93 Difference]: Finished difference Result 8388 states and 35557 transitions. [2021-11-23 03:14:41,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-23 03:14:41,614 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 23 [2021-11-23 03:14:41,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:41,638 INFO L225 Difference]: With dead ends: 8388 [2021-11-23 03:14:41,639 INFO L226 Difference]: Without dead ends: 8352 [2021-11-23 03:14:41,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=686, Invalid=2506, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 03:14:41,643 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 314 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:41,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 85 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 03:14:41,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-11-23 03:14:41,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 4826. [2021-11-23 03:14:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 4.674818652849741) internal successors, (22556), 4825 states have internal predecessors, (22556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 22556 transitions. [2021-11-23 03:14:41,899 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 22556 transitions. Word has length 23 [2021-11-23 03:14:41,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:41,900 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 22556 transitions. [2021-11-23 03:14:41,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) [2021-11-23 03:14:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 22556 transitions. [2021-11-23 03:14:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:41,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:41,917 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:41,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:42,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-23 03:14:42,144 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:42,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:42,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1211736849, now seen corresponding path program 33 times [2021-11-23 03:14:42,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:42,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665408826] [2021-11-23 03:14:42,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:42,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:42,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:42,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665408826] [2021-11-23 03:14:42,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665408826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:42,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138714208] [2021-11-23 03:14:42,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:14:42,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:42,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:42,248 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:42,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-23 03:14:42,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:14:42,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:42,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:42,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:14:42,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:14:42,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138714208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:42,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [353982476] [2021-11-23 03:14:42,627 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:42,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:42,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2021-11-23 03:14:42,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44495088] [2021-11-23 03:14:42,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:42,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:14:42,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:42,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:14:42,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:14:42,629 INFO L87 Difference]: Start difference. First operand 4826 states and 22556 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) [2021-11-23 03:14:45,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:45,863 INFO L93 Difference]: Finished difference Result 8364 states and 35149 transitions. [2021-11-23 03:14:45,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-23 03:14:45,864 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 23 [2021-11-23 03:14:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:45,894 INFO L225 Difference]: With dead ends: 8364 [2021-11-23 03:14:45,894 INFO L226 Difference]: Without dead ends: 8290 [2021-11-23 03:14:45,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=833, Invalid=3457, Unknown=0, NotChecked=0, Total=4290 [2021-11-23 03:14:45,896 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 278 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 1711 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:45,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 107 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1711 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 03:14:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-23 03:14:46,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 5288. [2021-11-23 03:14:46,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5288 states, 5287 states have (on average 4.644221675808587) internal successors, (24554), 5287 states have internal predecessors, (24554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:46,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 24554 transitions. [2021-11-23 03:14:46,072 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 24554 transitions. Word has length 23 [2021-11-23 03:14:46,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:46,072 INFO L470 AbstractCegarLoop]: Abstraction has 5288 states and 24554 transitions. [2021-11-23 03:14:46,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) [2021-11-23 03:14:46,072 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 24554 transitions. [2021-11-23 03:14:46,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:46,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:46,085 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:46,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:46,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-23 03:14:46,285 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:46,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:46,286 INFO L85 PathProgramCache]: Analyzing trace with hash -111566529, now seen corresponding path program 34 times [2021-11-23 03:14:46,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:46,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325614475] [2021-11-23 03:14:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:46,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:46,380 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:46,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325614475] [2021-11-23 03:14:46,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325614475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:46,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423323244] [2021-11-23 03:14:46,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:14:46,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:46,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:46,382 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:46,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-23 03:14:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:46,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:46,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:46,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:46,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423323244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:46,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1677608994] [2021-11-23 03:14:46,645 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:46,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:46,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2021-11-23 03:14:46,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113414101] [2021-11-23 03:14:46,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:46,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:14:46,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:46,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:14:46,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:14:46,647 INFO L87 Difference]: Start difference. First operand 5288 states and 24554 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:47,683 INFO L93 Difference]: Finished difference Result 7752 states and 34426 transitions. [2021-11-23 03:14:47,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 03:14:47,684 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 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 23 [2021-11-23 03:14:47,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:47,721 INFO L225 Difference]: With dead ends: 7752 [2021-11-23 03:14:47,722 INFO L226 Difference]: Without dead ends: 7732 [2021-11-23 03:14:47,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2021-11-23 03:14:47,724 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 160 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:47,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 72 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:14:47,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7732 states. [2021-11-23 03:14:48,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7732 to 5318. [2021-11-23 03:14:48,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5318 states, 5317 states have (on average 4.638894113221742) internal successors, (24665), 5317 states have internal predecessors, (24665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5318 states to 5318 states and 24665 transitions. [2021-11-23 03:14:48,037 INFO L78 Accepts]: Start accepts. Automaton has 5318 states and 24665 transitions. Word has length 23 [2021-11-23 03:14:48,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:48,037 INFO L470 AbstractCegarLoop]: Abstraction has 5318 states and 24665 transitions. [2021-11-23 03:14:48,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:48,037 INFO L276 IsEmpty]: Start isEmpty. Operand 5318 states and 24665 transitions. [2021-11-23 03:14:48,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:48,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:48,051 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:48,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-23 03:14:48,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-23 03:14:48,251 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:48,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:48,252 INFO L85 PathProgramCache]: Analyzing trace with hash -442168103, now seen corresponding path program 35 times [2021-11-23 03:14:48,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:48,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288062228] [2021-11-23 03:14:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:48,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:14:48,338 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:48,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288062228] [2021-11-23 03:14:48,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288062228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:48,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506336190] [2021-11-23 03:14:48,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:14:48,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:48,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:48,339 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:48,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-23 03:14:48,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:14:48,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:48,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:48,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:14:48,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:14:48,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506336190] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:48,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [707854723] [2021-11-23 03:14:48,613 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:14:48,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:14:48,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2021-11-23 03:14:48,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978758786] [2021-11-23 03:14:48,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:48,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:14:48,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:48,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:14:48,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:14:48,615 INFO L87 Difference]: Start difference. First operand 5318 states and 24665 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:49,422 INFO L93 Difference]: Finished difference Result 8738 states and 38680 transitions. [2021-11-23 03:14:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 03:14:49,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 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 23 [2021-11-23 03:14:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:49,450 INFO L225 Difference]: With dead ends: 8738 [2021-11-23 03:14:49,450 INFO L226 Difference]: Without dead ends: 8730 [2021-11-23 03:14:49,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:14:49,451 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 269 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:49,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 68 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:14:49,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8730 states. [2021-11-23 03:14:49,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8730 to 5124. [2021-11-23 03:14:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5124 states, 5123 states have (on average 4.613312512199883) internal successors, (23634), 5123 states have internal predecessors, (23634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:49,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 23634 transitions. [2021-11-23 03:14:49,633 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 23634 transitions. Word has length 23 [2021-11-23 03:14:49,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:49,633 INFO L470 AbstractCegarLoop]: Abstraction has 5124 states and 23634 transitions. [2021-11-23 03:14:49,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:14:49,634 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 23634 transitions. [2021-11-23 03:14:49,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:14:49,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:49,678 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:49,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:49,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-23 03:14:49,879 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:14:49,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:49,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1205900251, now seen corresponding path program 36 times [2021-11-23 03:14:49,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:49,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527249099] [2021-11-23 03:14:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:49,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:49,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:49,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527249099] [2021-11-23 03:14:49,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527249099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:14:49,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359089604] [2021-11-23 03:14:49,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:14:49,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:49,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:49,968 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:49,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-23 03:14:50,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:14:50,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:50,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:50,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:50,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:15:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:12,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359089604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:15:12,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [795676353] [2021-11-23 03:15:12,901 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:15:12,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:15:12,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-11-23 03:15:12,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305178793] [2021-11-23 03:15:12,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:15:12,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:15:12,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:12,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:15:12,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=94, Unknown=6, NotChecked=0, Total=132 [2021-11-23 03:15:12,905 INFO L87 Difference]: Start difference. First operand 5124 states and 23634 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-11-23 03:15:20,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:20,177 INFO L93 Difference]: Finished difference Result 5662 states and 25426 transitions. [2021-11-23 03:15:20,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:15:20,178 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 23 [2021-11-23 03:15:20,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:20,206 INFO L225 Difference]: With dead ends: 5662 [2021-11-23 03:15:20,206 INFO L226 Difference]: Without dead ends: 5630 [2021-11-23 03:15:20,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=93, Invalid=240, Unknown=9, NotChecked=0, Total=342 [2021-11-23 03:15:20,207 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 114 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:20,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 60 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 342 Invalid, 0 Unknown, 68 Unchecked, 0.5s Time] [2021-11-23 03:15:20,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5630 states. [2021-11-23 03:15:20,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5630 to 5174. [2021-11-23 03:15:20,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5174 states, 5173 states have (on average 4.610670790643727) internal successors, (23851), 5173 states have internal predecessors, (23851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:20,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 23851 transitions. [2021-11-23 03:15:20,422 INFO L78 Accepts]: Start accepts. Automaton has 5174 states and 23851 transitions. Word has length 23 [2021-11-23 03:15:20,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:20,422 INFO L470 AbstractCegarLoop]: Abstraction has 5174 states and 23851 transitions. [2021-11-23 03:15:20,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-11-23 03:15:20,423 INFO L276 IsEmpty]: Start isEmpty. Operand 5174 states and 23851 transitions. [2021-11-23 03:15:20,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:15:20,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:20,440 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:20,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-23 03:15:20,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:20,656 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:15:20,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:20,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1125225557, now seen corresponding path program 37 times [2021-11-23 03:15:20,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:20,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609] [2021-11-23 03:15:20,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:20,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:20,763 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:20,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609] [2021-11-23 03:15:20,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:15:20,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124955098] [2021-11-23 03:15:20,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:15:20,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:20,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:15:20,766 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:15:20,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-23 03:15:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:20,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:15:20,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:15:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:20,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:15:21,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:21,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124955098] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:15:21,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [491086274] [2021-11-23 03:15:21,136 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:15:21,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:15:21,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2021-11-23 03:15:21,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820467222] [2021-11-23 03:15:21,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:15:21,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:15:21,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:21,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:15:21,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:15:21,138 INFO L87 Difference]: Start difference. First operand 5174 states and 23851 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:21,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:21,945 INFO L93 Difference]: Finished difference Result 6968 states and 31383 transitions. [2021-11-23 03:15:21,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:15:21,946 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 23 [2021-11-23 03:15:21,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:21,970 INFO L225 Difference]: With dead ends: 6968 [2021-11-23 03:15:21,970 INFO L226 Difference]: Without dead ends: 6952 [2021-11-23 03:15:21,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:15:21,971 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 164 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:21,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 55 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:15:21,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6952 states. [2021-11-23 03:15:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6952 to 5102. [2021-11-23 03:15:22,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5102 states, 5101 states have (on average 4.6079200156832) internal successors, (23505), 5101 states have internal predecessors, (23505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5102 states to 5102 states and 23505 transitions. [2021-11-23 03:15:22,238 INFO L78 Accepts]: Start accepts. Automaton has 5102 states and 23505 transitions. Word has length 23 [2021-11-23 03:15:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:22,238 INFO L470 AbstractCegarLoop]: Abstraction has 5102 states and 23505 transitions. [2021-11-23 03:15:22,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:22,239 INFO L276 IsEmpty]: Start isEmpty. Operand 5102 states and 23505 transitions. [2021-11-23 03:15:22,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:15:22,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:22,251 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:22,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-23 03:15:22,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-23 03:15:22,452 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:15:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:22,453 INFO L85 PathProgramCache]: Analyzing trace with hash 481784365, now seen corresponding path program 38 times [2021-11-23 03:15:22,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:22,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65642952] [2021-11-23 03:15:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:22,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:22,602 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:22,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65642952] [2021-11-23 03:15:22,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65642952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:15:22,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221077231] [2021-11-23 03:15:22,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:15:22,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:22,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:15:22,604 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:15:22,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-23 03:15:22,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:15:22,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:15:22,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:15:22,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:15:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:22,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:15:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:23,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221077231] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:15:23,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2011477879] [2021-11-23 03:15:23,061 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:15:23,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:15:23,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-11-23 03:15:23,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616109830] [2021-11-23 03:15:23,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:15:23,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:15:23,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:23,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:15:23,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:15:23,064 INFO L87 Difference]: Start difference. First operand 5102 states and 23505 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:24,399 INFO L93 Difference]: Finished difference Result 7128 states and 31097 transitions. [2021-11-23 03:15:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 03:15:24,400 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 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 23 [2021-11-23 03:15:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:24,422 INFO L225 Difference]: With dead ends: 7128 [2021-11-23 03:15:24,422 INFO L226 Difference]: Without dead ends: 7086 [2021-11-23 03:15:24,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:15:24,423 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 198 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:24,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 88 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:15:24,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7086 states. [2021-11-23 03:15:24,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7086 to 5550. [2021-11-23 03:15:24,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 4.667687871688592) internal successors, (25901), 5549 states have internal predecessors, (25901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:24,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 25901 transitions. [2021-11-23 03:15:24,619 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 25901 transitions. Word has length 23 [2021-11-23 03:15:24,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:24,620 INFO L470 AbstractCegarLoop]: Abstraction has 5550 states and 25901 transitions. [2021-11-23 03:15:24,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:24,620 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 25901 transitions. [2021-11-23 03:15:24,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:15:24,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:24,636 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:24,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-23 03:15:24,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-23 03:15:24,853 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:15:24,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:24,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1620460581, now seen corresponding path program 39 times [2021-11-23 03:15:24,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:24,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118398043] [2021-11-23 03:15:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:24,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:25,031 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:25,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118398043] [2021-11-23 03:15:25,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118398043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:15:25,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539238990] [2021-11-23 03:15:25,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:15:25,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:25,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:15:25,033 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:15:25,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-23 03:15:25,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:15:25,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:15:25,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:15:25,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:15:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:25,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:15:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:25,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539238990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:15:25,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127791764] [2021-11-23 03:15:25,577 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:15:25,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:15:25,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-23 03:15:25,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037780699] [2021-11-23 03:15:25,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:15:25,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:15:25,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:25,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:15:25,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:15:25,579 INFO L87 Difference]: Start difference. First operand 5550 states and 25901 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:26,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:26,662 INFO L93 Difference]: Finished difference Result 7290 states and 31746 transitions. [2021-11-23 03:15:26,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:15:26,663 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 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 23 [2021-11-23 03:15:26,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:26,690 INFO L225 Difference]: With dead ends: 7290 [2021-11-23 03:15:26,691 INFO L226 Difference]: Without dead ends: 7258 [2021-11-23 03:15:26,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:15:26,692 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 300 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:26,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 76 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:15:26,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7258 states. [2021-11-23 03:15:26,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7258 to 5078. [2021-11-23 03:15:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5078 states, 5077 states have (on average 4.592672838290329) internal successors, (23317), 5077 states have internal predecessors, (23317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5078 states to 5078 states and 23317 transitions. [2021-11-23 03:15:26,886 INFO L78 Accepts]: Start accepts. Automaton has 5078 states and 23317 transitions. Word has length 23 [2021-11-23 03:15:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:26,886 INFO L470 AbstractCegarLoop]: Abstraction has 5078 states and 23317 transitions. [2021-11-23 03:15:26,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:26,886 INFO L276 IsEmpty]: Start isEmpty. Operand 5078 states and 23317 transitions. [2021-11-23 03:15:26,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:15:26,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:26,899 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:26,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-23 03:15:27,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:27,112 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:15:27,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:27,112 INFO L85 PathProgramCache]: Analyzing trace with hash 166342876, now seen corresponding path program 40 times [2021-11-23 03:15:27,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:27,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517711531] [2021-11-23 03:15:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:27,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:27,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:27,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517711531] [2021-11-23 03:15:27,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517711531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:15:27,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703339207] [2021-11-23 03:15:27,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:15:27,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:27,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:15:27,263 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:15:27,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-23 03:15:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:27,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:15:27,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:15:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:27,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:15:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:27,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703339207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:15:27,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [431958779] [2021-11-23 03:15:27,650 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:15:27,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:15:27,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-23 03:15:27,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38483142] [2021-11-23 03:15:27,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:15:27,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:15:27,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:27,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:15:27,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:15:27,653 INFO L87 Difference]: Start difference. First operand 5078 states and 23317 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:28,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:28,850 INFO L93 Difference]: Finished difference Result 8060 states and 35128 transitions. [2021-11-23 03:15:28,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:15:28,851 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 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 23 [2021-11-23 03:15:28,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:28,876 INFO L225 Difference]: With dead ends: 8060 [2021-11-23 03:15:28,876 INFO L226 Difference]: Without dead ends: 8002 [2021-11-23 03:15:28,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:15:28,877 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 239 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:28,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 80 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 03:15:28,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2021-11-23 03:15:29,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 5798. [2021-11-23 03:15:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5798 states, 5797 states have (on average 4.669829222011385) internal successors, (27071), 5797 states have internal predecessors, (27071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5798 states to 5798 states and 27071 transitions. [2021-11-23 03:15:29,144 INFO L78 Accepts]: Start accepts. Automaton has 5798 states and 27071 transitions. Word has length 23 [2021-11-23 03:15:29,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:29,144 INFO L470 AbstractCegarLoop]: Abstraction has 5798 states and 27071 transitions. [2021-11-23 03:15:29,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 5798 states and 27071 transitions. [2021-11-23 03:15:29,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:15:29,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:29,156 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:29,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-23 03:15:29,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:29,356 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:15:29,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:29,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1489956635, now seen corresponding path program 41 times [2021-11-23 03:15:29,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:29,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069169462] [2021-11-23 03:15:29,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:29,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:29,491 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:29,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069169462] [2021-11-23 03:15:29,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069169462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:15:29,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332243656] [2021-11-23 03:15:29,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:15:29,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:29,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:15:29,496 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:15:29,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-23 03:15:29,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:15:29,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:15:29,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:15:29,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:15:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:29,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:15:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:29,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332243656] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:15:29,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1996322962] [2021-11-23 03:15:29,841 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:15:29,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:15:29,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2021-11-23 03:15:29,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255042950] [2021-11-23 03:15:29,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:15:29,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:15:29,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:29,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:15:29,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:15:29,843 INFO L87 Difference]: Start difference. First operand 5798 states and 27071 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:35,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:35,195 INFO L93 Difference]: Finished difference Result 10690 states and 44325 transitions. [2021-11-23 03:15:35,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-23 03:15:35,195 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 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 23 [2021-11-23 03:15:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:35,224 INFO L225 Difference]: With dead ends: 10690 [2021-11-23 03:15:35,224 INFO L226 Difference]: Without dead ends: 10550 [2021-11-23 03:15:35,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1167, Invalid=6315, Unknown=0, NotChecked=0, Total=7482 [2021-11-23 03:15:35,225 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 368 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:35,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 108 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1732 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 03:15:35,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10550 states. [2021-11-23 03:15:35,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10550 to 6310. [2021-11-23 03:15:35,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6310 states, 6309 states have (on average 4.6831510540497705) internal successors, (29546), 6309 states have internal predecessors, (29546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6310 states to 6310 states and 29546 transitions. [2021-11-23 03:15:35,504 INFO L78 Accepts]: Start accepts. Automaton has 6310 states and 29546 transitions. Word has length 23 [2021-11-23 03:15:35,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:35,505 INFO L470 AbstractCegarLoop]: Abstraction has 6310 states and 29546 transitions. [2021-11-23 03:15:35,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:35,505 INFO L276 IsEmpty]: Start isEmpty. Operand 6310 states and 29546 transitions. [2021-11-23 03:15:35,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:15:35,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:35,519 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:35,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-23 03:15:35,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-23 03:15:35,719 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:15:35,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:35,720 INFO L85 PathProgramCache]: Analyzing trace with hash 176674079, now seen corresponding path program 42 times [2021-11-23 03:15:35,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:35,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543393707] [2021-11-23 03:15:35,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:35,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:35,834 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:35,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543393707] [2021-11-23 03:15:35,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543393707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:15:35,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605570900] [2021-11-23 03:15:35,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:15:35,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:35,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:15:35,836 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:15:35,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-23 03:15:35,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:15:35,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:15:35,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:15:35,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:15:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:36,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:15:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:36,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605570900] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:15:36,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [658309824] [2021-11-23 03:15:36,200 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:15:36,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:15:36,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-11-23 03:15:36,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485800476] [2021-11-23 03:15:36,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:15:36,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:15:36,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:36,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:15:36,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:15:36,202 INFO L87 Difference]: Start difference. First operand 6310 states and 29546 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:40,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:40,131 INFO L93 Difference]: Finished difference Result 9158 states and 39711 transitions. [2021-11-23 03:15:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-23 03:15:40,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 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 23 [2021-11-23 03:15:40,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:40,163 INFO L225 Difference]: With dead ends: 9158 [2021-11-23 03:15:40,163 INFO L226 Difference]: Without dead ends: 9026 [2021-11-23 03:15:40,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=587, Invalid=3073, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 03:15:40,165 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 215 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 1879 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:40,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 132 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1879 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 03:15:40,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9026 states. [2021-11-23 03:15:40,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9026 to 6146. [2021-11-23 03:15:40,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6146 states, 6145 states have (on average 4.6566314076484945) internal successors, (28615), 6145 states have internal predecessors, (28615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:40,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6146 states to 6146 states and 28615 transitions. [2021-11-23 03:15:40,381 INFO L78 Accepts]: Start accepts. Automaton has 6146 states and 28615 transitions. Word has length 23 [2021-11-23 03:15:40,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:40,382 INFO L470 AbstractCegarLoop]: Abstraction has 6146 states and 28615 transitions. [2021-11-23 03:15:40,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:40,382 INFO L276 IsEmpty]: Start isEmpty. Operand 6146 states and 28615 transitions. [2021-11-23 03:15:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:15:40,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:40,398 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:40,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-23 03:15:40,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:40,598 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:15:40,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:40,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2095365289, now seen corresponding path program 43 times [2021-11-23 03:15:40,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:40,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114579271] [2021-11-23 03:15:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:40,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:40,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:40,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114579271] [2021-11-23 03:15:40,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114579271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:15:40,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665486807] [2021-11-23 03:15:40,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:15:40,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:40,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:15:40,712 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:15:40,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-23 03:15:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:40,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:15:40,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:15:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:40,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:15:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:41,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665486807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:15:41,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1803054022] [2021-11-23 03:15:41,138 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:15:41,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:15:41,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2021-11-23 03:15:41,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468189218] [2021-11-23 03:15:41,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:15:41,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:15:41,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:41,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:15:41,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:15:41,140 INFO L87 Difference]: Start difference. First operand 6146 states and 28615 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:42,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:42,423 INFO L93 Difference]: Finished difference Result 8664 states and 37393 transitions. [2021-11-23 03:15:42,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 03:15:42,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 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 23 [2021-11-23 03:15:42,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:42,446 INFO L225 Difference]: With dead ends: 8664 [2021-11-23 03:15:42,446 INFO L226 Difference]: Without dead ends: 8608 [2021-11-23 03:15:42,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:15:42,446 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 233 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:42,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 82 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 03:15:42,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8608 states. [2021-11-23 03:15:42,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8608 to 6000. [2021-11-23 03:15:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6000 states, 5999 states have (on average 4.652942157026171) internal successors, (27913), 5999 states have internal predecessors, (27913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6000 states to 6000 states and 27913 transitions. [2021-11-23 03:15:42,649 INFO L78 Accepts]: Start accepts. Automaton has 6000 states and 27913 transitions. Word has length 23 [2021-11-23 03:15:42,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:42,649 INFO L470 AbstractCegarLoop]: Abstraction has 6000 states and 27913 transitions. [2021-11-23 03:15:42,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:42,649 INFO L276 IsEmpty]: Start isEmpty. Operand 6000 states and 27913 transitions. [2021-11-23 03:15:42,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:15:42,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:42,664 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:42,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-23 03:15:42,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-23 03:15:42,864 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:15:42,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:42,865 INFO L85 PathProgramCache]: Analyzing trace with hash 301205068, now seen corresponding path program 44 times [2021-11-23 03:15:42,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:42,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816977312] [2021-11-23 03:15:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:42,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:42,979 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:42,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816977312] [2021-11-23 03:15:42,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816977312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:15:42,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404418825] [2021-11-23 03:15:42,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:15:42,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:42,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:15:42,981 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:15:42,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-23 03:15:43,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:15:43,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:15:43,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:15:43,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:15:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:43,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:15:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:43,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404418825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:15:43,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271224509] [2021-11-23 03:15:43,340 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:15:43,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:15:43,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2021-11-23 03:15:43,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860928952] [2021-11-23 03:15:43,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:15:43,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:15:43,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:43,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:15:43,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:15:43,342 INFO L87 Difference]: Start difference. First operand 6000 states and 27913 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:44,788 INFO L93 Difference]: Finished difference Result 9052 states and 39302 transitions. [2021-11-23 03:15:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 03:15:44,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 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 23 [2021-11-23 03:15:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:44,829 INFO L225 Difference]: With dead ends: 9052 [2021-11-23 03:15:44,829 INFO L226 Difference]: Without dead ends: 8912 [2021-11-23 03:15:44,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:15:44,830 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 205 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:44,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 94 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:15:44,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8912 states. [2021-11-23 03:15:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8912 to 6622. [2021-11-23 03:15:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6622 states, 6621 states have (on average 4.640537683129437) internal successors, (30725), 6621 states have internal predecessors, (30725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:45,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6622 states to 6622 states and 30725 transitions. [2021-11-23 03:15:45,121 INFO L78 Accepts]: Start accepts. Automaton has 6622 states and 30725 transitions. Word has length 23 [2021-11-23 03:15:45,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:45,121 INFO L470 AbstractCegarLoop]: Abstraction has 6622 states and 30725 transitions. [2021-11-23 03:15:45,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:45,121 INFO L276 IsEmpty]: Start isEmpty. Operand 6622 states and 30725 transitions. [2021-11-23 03:15:45,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:15:45,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:45,138 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:45,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-23 03:15:45,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-23 03:15:45,339 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:15:45,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:45,339 INFO L85 PathProgramCache]: Analyzing trace with hash -467290296, now seen corresponding path program 45 times [2021-11-23 03:15:45,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:45,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942795758] [2021-11-23 03:15:45,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:45,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:45,429 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:45,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942795758] [2021-11-23 03:15:45,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942795758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:15:45,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396722735] [2021-11-23 03:15:45,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:15:45,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:45,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:15:45,432 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:15:45,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-23 03:15:45,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:15:45,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:15:45,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:15:45,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:15:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:45,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:15:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:45,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396722735] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:15:45,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [491246078] [2021-11-23 03:15:45,822 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:15:45,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:15:45,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2021-11-23 03:15:45,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103709196] [2021-11-23 03:15:45,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:15:45,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:15:45,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:45,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:15:45,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:15:45,824 INFO L87 Difference]: Start difference. First operand 6622 states and 30725 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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) [2021-11-23 03:15:47,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:47,296 INFO L93 Difference]: Finished difference Result 9492 states and 42108 transitions. [2021-11-23 03:15:47,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 03:15:47,297 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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 23 [2021-11-23 03:15:47,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:47,327 INFO L225 Difference]: With dead ends: 9492 [2021-11-23 03:15:47,327 INFO L226 Difference]: Without dead ends: 9380 [2021-11-23 03:15:47,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2021-11-23 03:15:47,328 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 196 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:47,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 74 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:15:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9380 states. [2021-11-23 03:15:47,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9380 to 7774. [2021-11-23 03:15:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7774 states, 7773 states have (on average 4.697156824906728) internal successors, (36511), 7773 states have internal predecessors, (36511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:47,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7774 states to 7774 states and 36511 transitions. [2021-11-23 03:15:47,551 INFO L78 Accepts]: Start accepts. Automaton has 7774 states and 36511 transitions. Word has length 23 [2021-11-23 03:15:47,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:47,551 INFO L470 AbstractCegarLoop]: Abstraction has 7774 states and 36511 transitions. [2021-11-23 03:15:47,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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) [2021-11-23 03:15:47,552 INFO L276 IsEmpty]: Start isEmpty. Operand 7774 states and 36511 transitions. [2021-11-23 03:15:47,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:15:47,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:47,569 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:47,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-23 03:15:47,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-23 03:15:47,770 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:15:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2067728150, now seen corresponding path program 46 times [2021-11-23 03:15:47,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:47,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317715731] [2021-11-23 03:15:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:47,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:47,849 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:47,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317715731] [2021-11-23 03:15:47,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317715731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:15:47,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633207351] [2021-11-23 03:15:47,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:15:47,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:47,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:15:47,850 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:15:47,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-23 03:15:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:47,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:15:47,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:15:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:47,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:15:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:48,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633207351] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:15:48,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [487128544] [2021-11-23 03:15:48,134 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:15:48,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:15:48,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2021-11-23 03:15:48,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652325580] [2021-11-23 03:15:48,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:15:48,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:15:48,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:48,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:15:48,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:15:48,137 INFO L87 Difference]: Start difference. First operand 7774 states and 36511 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:49,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:49,079 INFO L93 Difference]: Finished difference Result 9208 states and 41118 transitions. [2021-11-23 03:15:49,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:15:49,079 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 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 23 [2021-11-23 03:15:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:49,113 INFO L225 Difference]: With dead ends: 9208 [2021-11-23 03:15:49,114 INFO L226 Difference]: Without dead ends: 9156 [2021-11-23 03:15:49,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:15:49,114 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 226 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:49,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 45 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:15:49,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9156 states. [2021-11-23 03:15:49,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9156 to 7558. [2021-11-23 03:15:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7558 states, 7557 states have (on average 4.676855895196507) internal successors, (35343), 7557 states have internal predecessors, (35343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:49,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7558 states to 7558 states and 35343 transitions. [2021-11-23 03:15:49,364 INFO L78 Accepts]: Start accepts. Automaton has 7558 states and 35343 transitions. Word has length 23 [2021-11-23 03:15:49,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:49,364 INFO L470 AbstractCegarLoop]: Abstraction has 7558 states and 35343 transitions. [2021-11-23 03:15:49,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:49,364 INFO L276 IsEmpty]: Start isEmpty. Operand 7558 states and 35343 transitions. [2021-11-23 03:15:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:15:49,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:49,383 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:49,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-23 03:15:49,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-23 03:15:49,583 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:15:49,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:49,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1295894222, now seen corresponding path program 47 times [2021-11-23 03:15:49,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:49,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162956104] [2021-11-23 03:15:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:49,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:49,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:49,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162956104] [2021-11-23 03:15:49,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162956104] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:15:49,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812278298] [2021-11-23 03:15:49,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:15:49,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:49,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:15:49,722 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:15:49,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-23 03:15:49,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:15:49,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:15:49,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:15:49,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:15:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:49,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:15:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:50,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812278298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:15:50,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1412959956] [2021-11-23 03:15:50,025 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:15:50,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:15:50,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-23 03:15:50,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136833848] [2021-11-23 03:15:50,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:15:50,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:15:50,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:50,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:15:50,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:15:50,026 INFO L87 Difference]: Start difference. First operand 7558 states and 35343 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) [2021-11-23 03:15:51,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:51,211 INFO L93 Difference]: Finished difference Result 10860 states and 48047 transitions. [2021-11-23 03:15:51,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 03:15:51,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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 23 [2021-11-23 03:15:51,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:51,247 INFO L225 Difference]: With dead ends: 10860 [2021-11-23 03:15:51,248 INFO L226 Difference]: Without dead ends: 10774 [2021-11-23 03:15:51,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:15:51,248 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 202 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:51,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 75 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:15:51,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10774 states. [2021-11-23 03:15:51,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10774 to 7796. [2021-11-23 03:15:51,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7796 states, 7795 states have (on average 4.674534958306607) internal successors, (36438), 7795 states have internal predecessors, (36438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:51,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7796 states to 7796 states and 36438 transitions. [2021-11-23 03:15:51,630 INFO L78 Accepts]: Start accepts. Automaton has 7796 states and 36438 transitions. Word has length 23 [2021-11-23 03:15:51,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:51,630 INFO L470 AbstractCegarLoop]: Abstraction has 7796 states and 36438 transitions. [2021-11-23 03:15:51,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) [2021-11-23 03:15:51,631 INFO L276 IsEmpty]: Start isEmpty. Operand 7796 states and 36438 transitions. [2021-11-23 03:15:51,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:15:51,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:51,649 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:51,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-23 03:15:51,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:51,850 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:15:51,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:51,850 INFO L85 PathProgramCache]: Analyzing trace with hash 782410870, now seen corresponding path program 48 times [2021-11-23 03:15:51,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:51,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295382063] [2021-11-23 03:15:51,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:51,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:51,961 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:51,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295382063] [2021-11-23 03:15:51,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295382063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:15:51,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962836447] [2021-11-23 03:15:51,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:15:51,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:51,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:15:51,963 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:15:51,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-23 03:15:52,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:15:52,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:15:52,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:15:52,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:15:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:52,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:15:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:52,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962836447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:15:52,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2001534458] [2021-11-23 03:15:52,392 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:15:52,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:15:52,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2021-11-23 03:15:52,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005086835] [2021-11-23 03:15:52,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:15:52,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:15:52,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:52,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:15:52,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:15:52,394 INFO L87 Difference]: Start difference. First operand 7796 states and 36438 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:56,654 INFO L93 Difference]: Finished difference Result 13266 states and 58127 transitions. [2021-11-23 03:15:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-23 03:15:56,655 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 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 23 [2021-11-23 03:15:56,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:56,705 INFO L225 Difference]: With dead ends: 13266 [2021-11-23 03:15:56,705 INFO L226 Difference]: Without dead ends: 13198 [2021-11-23 03:15:56,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=813, Invalid=3743, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 03:15:56,706 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 302 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:56,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 96 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1432 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 03:15:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13198 states. [2021-11-23 03:15:56,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13198 to 7984. [2021-11-23 03:15:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7984 states, 7983 states have (on average 4.669297256670425) internal successors, (37275), 7983 states have internal predecessors, (37275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:57,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7984 states to 7984 states and 37275 transitions. [2021-11-23 03:15:57,006 INFO L78 Accepts]: Start accepts. Automaton has 7984 states and 37275 transitions. Word has length 23 [2021-11-23 03:15:57,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:57,006 INFO L470 AbstractCegarLoop]: Abstraction has 7984 states and 37275 transitions. [2021-11-23 03:15:57,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:57,006 INFO L276 IsEmpty]: Start isEmpty. Operand 7984 states and 37275 transitions. [2021-11-23 03:15:57,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:15:57,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:57,027 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:57,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-23 03:15:57,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-11-23 03:15:57,227 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:15:57,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:57,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2058358388, now seen corresponding path program 49 times [2021-11-23 03:15:57,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:57,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178511828] [2021-11-23 03:15:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:57,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:57,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:57,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178511828] [2021-11-23 03:15:57,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178511828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:15:57,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122061682] [2021-11-23 03:15:57,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:15:57,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:57,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:15:57,332 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:15:57,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-23 03:15:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:57,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:15:57,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:15:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:57,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:15:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:15:57,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122061682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:15:57,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [812077182] [2021-11-23 03:15:57,724 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:15:57,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:15:57,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2021-11-23 03:15:57,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913009208] [2021-11-23 03:15:57,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:15:57,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:15:57,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:57,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:15:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:15:57,726 INFO L87 Difference]: Start difference. First operand 7984 states and 37275 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:01,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:01,509 INFO L93 Difference]: Finished difference Result 15152 states and 65399 transitions. [2021-11-23 03:16:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-23 03:16:01,510 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 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 23 [2021-11-23 03:16:01,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:01,558 INFO L225 Difference]: With dead ends: 15152 [2021-11-23 03:16:01,558 INFO L226 Difference]: Without dead ends: 14952 [2021-11-23 03:16:01,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1153, Invalid=4397, Unknown=0, NotChecked=0, Total=5550 [2021-11-23 03:16:01,560 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 388 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:01,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 113 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 03:16:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14952 states. [2021-11-23 03:16:01,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14952 to 8472. [2021-11-23 03:16:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8472 states, 8471 states have (on average 4.702160311651517) internal successors, (39832), 8471 states have internal predecessors, (39832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:01,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8472 states to 8472 states and 39832 transitions. [2021-11-23 03:16:01,881 INFO L78 Accepts]: Start accepts. Automaton has 8472 states and 39832 transitions. Word has length 23 [2021-11-23 03:16:01,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:01,881 INFO L470 AbstractCegarLoop]: Abstraction has 8472 states and 39832 transitions. [2021-11-23 03:16:01,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:01,881 INFO L276 IsEmpty]: Start isEmpty. Operand 8472 states and 39832 transitions. [2021-11-23 03:16:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:16:01,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:01,902 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:01,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:02,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-23 03:16:02,104 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:02,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:02,105 INFO L85 PathProgramCache]: Analyzing trace with hash -954192398, now seen corresponding path program 50 times [2021-11-23 03:16:02,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:02,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250628358] [2021-11-23 03:16:02,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:02,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:02,212 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:02,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250628358] [2021-11-23 03:16:02,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250628358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:02,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919444498] [2021-11-23 03:16:02,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:16:02,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:02,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:02,216 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:02,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-23 03:16:02,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:16:02,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:16:02,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:16:02,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:02,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:02,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919444498] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:02,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [161303548] [2021-11-23 03:16:02,591 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:02,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:02,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2021-11-23 03:16:02,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990506895] [2021-11-23 03:16:02,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:02,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:16:02,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:02,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:16:02,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:16:02,593 INFO L87 Difference]: Start difference. First operand 8472 states and 39832 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:03,763 INFO L93 Difference]: Finished difference Result 12818 states and 57534 transitions. [2021-11-23 03:16:03,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 03:16:03,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 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 23 [2021-11-23 03:16:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:03,807 INFO L225 Difference]: With dead ends: 12818 [2021-11-23 03:16:03,807 INFO L226 Difference]: Without dead ends: 12804 [2021-11-23 03:16:03,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:16:03,808 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 295 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:03,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 65 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:16:03,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12804 states. [2021-11-23 03:16:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12804 to 7704. [2021-11-23 03:16:04,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7704 states, 7703 states have (on average 4.648578475918473) internal successors, (35808), 7703 states have internal predecessors, (35808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7704 states to 7704 states and 35808 transitions. [2021-11-23 03:16:04,087 INFO L78 Accepts]: Start accepts. Automaton has 7704 states and 35808 transitions. Word has length 23 [2021-11-23 03:16:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:04,088 INFO L470 AbstractCegarLoop]: Abstraction has 7704 states and 35808 transitions. [2021-11-23 03:16:04,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:04,088 INFO L276 IsEmpty]: Start isEmpty. Operand 7704 states and 35808 transitions. [2021-11-23 03:16:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:16:04,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:04,106 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:04,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-11-23 03:16:04,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:04,307 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:04,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:04,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1296601166, now seen corresponding path program 51 times [2021-11-23 03:16:04,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:04,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936306073] [2021-11-23 03:16:04,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:04,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:04,443 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:04,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936306073] [2021-11-23 03:16:04,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936306073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:04,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451410576] [2021-11-23 03:16:04,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:16:04,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:04,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:04,445 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:04,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-23 03:16:04,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:16:04,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:16:04,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:16:04,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:04,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:04,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451410576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:04,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1886419519] [2021-11-23 03:16:04,776 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:04,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:04,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2021-11-23 03:16:04,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612019449] [2021-11-23 03:16:04,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:04,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:16:04,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:04,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:16:04,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:16:04,779 INFO L87 Difference]: Start difference. First operand 7704 states and 35808 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:06,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:06,126 INFO L93 Difference]: Finished difference Result 12888 states and 57380 transitions. [2021-11-23 03:16:06,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 03:16:06,126 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 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 23 [2021-11-23 03:16:06,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:06,173 INFO L225 Difference]: With dead ends: 12888 [2021-11-23 03:16:06,173 INFO L226 Difference]: Without dead ends: 12864 [2021-11-23 03:16:06,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:16:06,174 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 342 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:06,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 69 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:16:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12864 states. [2021-11-23 03:16:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12864 to 8204. [2021-11-23 03:16:06,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8204 states, 8203 states have (on average 4.674265512617335) internal successors, (38343), 8203 states have internal predecessors, (38343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:06,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8204 states to 8204 states and 38343 transitions. [2021-11-23 03:16:06,572 INFO L78 Accepts]: Start accepts. Automaton has 8204 states and 38343 transitions. Word has length 23 [2021-11-23 03:16:06,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:06,572 INFO L470 AbstractCegarLoop]: Abstraction has 8204 states and 38343 transitions. [2021-11-23 03:16:06,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:06,573 INFO L276 IsEmpty]: Start isEmpty. Operand 8204 states and 38343 transitions. [2021-11-23 03:16:06,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:16:06,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:06,593 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:06,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:06,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:06,793 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:06,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:06,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1570640882, now seen corresponding path program 52 times [2021-11-23 03:16:06,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:06,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258162552] [2021-11-23 03:16:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:06,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:06,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:06,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258162552] [2021-11-23 03:16:06,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258162552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:06,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896632517] [2021-11-23 03:16:06,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:16:06,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:06,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:06,892 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:06,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-23 03:16:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:06,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:16:06,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:07,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:07,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896632517] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:07,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [390362452] [2021-11-23 03:16:07,186 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:07,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:07,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-11-23 03:16:07,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210110778] [2021-11-23 03:16:07,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:07,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:16:07,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:07,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:16:07,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:16:07,189 INFO L87 Difference]: Start difference. First operand 8204 states and 38343 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:08,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:08,494 INFO L93 Difference]: Finished difference Result 12048 states and 54735 transitions. [2021-11-23 03:16:08,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 03:16:08,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 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 23 [2021-11-23 03:16:08,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:08,532 INFO L225 Difference]: With dead ends: 12048 [2021-11-23 03:16:08,532 INFO L226 Difference]: Without dead ends: 12048 [2021-11-23 03:16:08,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=696, Unknown=0, NotChecked=0, Total=930 [2021-11-23 03:16:08,532 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 249 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:08,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 62 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:16:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12048 states. [2021-11-23 03:16:08,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12048 to 8126. [2021-11-23 03:16:08,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8126 states, 8125 states have (on average 4.681969230769231) internal successors, (38041), 8125 states have internal predecessors, (38041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8126 states to 8126 states and 38041 transitions. [2021-11-23 03:16:08,795 INFO L78 Accepts]: Start accepts. Automaton has 8126 states and 38041 transitions. Word has length 23 [2021-11-23 03:16:08,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:08,795 INFO L470 AbstractCegarLoop]: Abstraction has 8126 states and 38041 transitions. [2021-11-23 03:16:08,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:08,795 INFO L276 IsEmpty]: Start isEmpty. Operand 8126 states and 38041 transitions. [2021-11-23 03:16:08,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:16:08,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:08,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:08,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:09,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-23 03:16:09,015 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:09,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:09,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1806024974, now seen corresponding path program 53 times [2021-11-23 03:16:09,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:09,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250891758] [2021-11-23 03:16:09,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:09,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:09,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:09,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250891758] [2021-11-23 03:16:09,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250891758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:09,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488693514] [2021-11-23 03:16:09,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:16:09,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:09,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:09,092 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:09,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-23 03:16:09,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:16:09,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:16:09,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:16:09,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:09,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:09,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488693514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:09,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [482889114] [2021-11-23 03:16:09,399 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:09,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:09,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2021-11-23 03:16:09,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763099637] [2021-11-23 03:16:09,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:09,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:16:09,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:09,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:16:09,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:16:09,401 INFO L87 Difference]: Start difference. First operand 8126 states and 38041 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:10,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:10,063 INFO L93 Difference]: Finished difference Result 10512 states and 48168 transitions. [2021-11-23 03:16:10,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:16:10,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 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 24 [2021-11-23 03:16:10,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:10,099 INFO L225 Difference]: With dead ends: 10512 [2021-11-23 03:16:10,099 INFO L226 Difference]: Without dead ends: 10512 [2021-11-23 03:16:10,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:16:10,100 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 155 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:10,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 60 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:16:10,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10512 states. [2021-11-23 03:16:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10512 to 8170. [2021-11-23 03:16:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8170 states, 8169 states have (on average 4.679520137103685) internal successors, (38227), 8169 states have internal predecessors, (38227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:10,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8170 states to 8170 states and 38227 transitions. [2021-11-23 03:16:10,338 INFO L78 Accepts]: Start accepts. Automaton has 8170 states and 38227 transitions. Word has length 24 [2021-11-23 03:16:10,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:10,339 INFO L470 AbstractCegarLoop]: Abstraction has 8170 states and 38227 transitions. [2021-11-23 03:16:10,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:10,339 INFO L276 IsEmpty]: Start isEmpty. Operand 8170 states and 38227 transitions. [2021-11-23 03:16:10,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:16:10,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:10,359 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:10,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:10,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:10,560 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:10,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:10,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1320805134, now seen corresponding path program 54 times [2021-11-23 03:16:10,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:10,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668524484] [2021-11-23 03:16:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:10,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:10,662 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:10,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668524484] [2021-11-23 03:16:10,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668524484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:10,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954335986] [2021-11-23 03:16:10,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:16:10,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:10,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:10,664 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:10,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-23 03:16:10,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:16:10,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:16:10,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:16:10,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:10,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:11,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954335986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:11,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [645369403] [2021-11-23 03:16:11,061 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:11,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:11,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2021-11-23 03:16:11,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012104865] [2021-11-23 03:16:11,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:11,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:16:11,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:11,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:16:11,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:16:11,062 INFO L87 Difference]: Start difference. First operand 8170 states and 38227 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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) [2021-11-23 03:16:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:12,297 INFO L93 Difference]: Finished difference Result 11624 states and 52346 transitions. [2021-11-23 03:16:12,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 03:16:12,298 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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 24 [2021-11-23 03:16:12,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:12,334 INFO L225 Difference]: With dead ends: 11624 [2021-11-23 03:16:12,334 INFO L226 Difference]: Without dead ends: 11612 [2021-11-23 03:16:12,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2021-11-23 03:16:12,335 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 168 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:12,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 80 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:16:12,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11612 states. [2021-11-23 03:16:12,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11612 to 8730. [2021-11-23 03:16:12,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8730 states, 8729 states have (on average 4.679115591705808) internal successors, (40844), 8729 states have internal predecessors, (40844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8730 states to 8730 states and 40844 transitions. [2021-11-23 03:16:12,724 INFO L78 Accepts]: Start accepts. Automaton has 8730 states and 40844 transitions. Word has length 24 [2021-11-23 03:16:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:12,724 INFO L470 AbstractCegarLoop]: Abstraction has 8730 states and 40844 transitions. [2021-11-23 03:16:12,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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) [2021-11-23 03:16:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 8730 states and 40844 transitions. [2021-11-23 03:16:12,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:16:12,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:12,751 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:12,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:12,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-23 03:16:12,953 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:12,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:12,953 INFO L85 PathProgramCache]: Analyzing trace with hash 500579998, now seen corresponding path program 55 times [2021-11-23 03:16:12,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:12,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849856774] [2021-11-23 03:16:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:12,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:13,058 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:13,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849856774] [2021-11-23 03:16:13,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849856774] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:13,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782854238] [2021-11-23 03:16:13,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:16:13,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:13,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:13,060 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:13,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-23 03:16:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:13,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:16:13,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:13,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:13,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782854238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:13,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1911823457] [2021-11-23 03:16:13,408 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:13,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:13,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2021-11-23 03:16:13,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394656430] [2021-11-23 03:16:13,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:13,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:16:13,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:13,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:16:13,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:16:13,409 INFO L87 Difference]: Start difference. First operand 8730 states and 40844 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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) [2021-11-23 03:16:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:15,115 INFO L93 Difference]: Finished difference Result 13984 states and 62067 transitions. [2021-11-23 03:16:15,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 03:16:15,116 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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 24 [2021-11-23 03:16:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:15,164 INFO L225 Difference]: With dead ends: 13984 [2021-11-23 03:16:15,164 INFO L226 Difference]: Without dead ends: 13952 [2021-11-23 03:16:15,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-11-23 03:16:15,165 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 195 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:15,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 97 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:16:15,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13952 states. [2021-11-23 03:16:15,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13952 to 9300. [2021-11-23 03:16:15,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9300 states, 9299 states have (on average 4.681686202817508) internal successors, (43535), 9299 states have internal predecessors, (43535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9300 states to 9300 states and 43535 transitions. [2021-11-23 03:16:15,485 INFO L78 Accepts]: Start accepts. Automaton has 9300 states and 43535 transitions. Word has length 24 [2021-11-23 03:16:15,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:15,486 INFO L470 AbstractCegarLoop]: Abstraction has 9300 states and 43535 transitions. [2021-11-23 03:16:15,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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) [2021-11-23 03:16:15,486 INFO L276 IsEmpty]: Start isEmpty. Operand 9300 states and 43535 transitions. [2021-11-23 03:16:15,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:16:15,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:15,507 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:15,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:15,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-23 03:16:15,708 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:15,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:15,709 INFO L85 PathProgramCache]: Analyzing trace with hash 325382038, now seen corresponding path program 56 times [2021-11-23 03:16:15,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:15,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083431755] [2021-11-23 03:16:15,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:15,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:16:15,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:15,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083431755] [2021-11-23 03:16:15,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083431755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:15,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305310635] [2021-11-23 03:16:15,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:16:15,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:15,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:15,812 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:15,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-23 03:16:15,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:16:15,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:16:15,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:16:15,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:16:16,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:16:16,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305310635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:16,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [473704656] [2021-11-23 03:16:16,197 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:16,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:16,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2021-11-23 03:16:16,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779763877] [2021-11-23 03:16:16,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:16,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:16:16,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:16,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:16:16,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:16:16,200 INFO L87 Difference]: Start difference. First operand 9300 states and 43535 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:17,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:17,766 INFO L93 Difference]: Finished difference Result 13692 states and 60082 transitions. [2021-11-23 03:16:17,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 03:16:17,766 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 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 24 [2021-11-23 03:16:17,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:17,926 INFO L225 Difference]: With dead ends: 13692 [2021-11-23 03:16:17,926 INFO L226 Difference]: Without dead ends: 13668 [2021-11-23 03:16:17,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:16:17,927 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 148 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:17,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 105 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:16:17,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13668 states. [2021-11-23 03:16:18,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13668 to 9700. [2021-11-23 03:16:18,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9700 states, 9699 states have (on average 4.6918238993710695) internal successors, (45506), 9699 states have internal predecessors, (45506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9700 states to 9700 states and 45506 transitions. [2021-11-23 03:16:18,249 INFO L78 Accepts]: Start accepts. Automaton has 9700 states and 45506 transitions. Word has length 24 [2021-11-23 03:16:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:18,250 INFO L470 AbstractCegarLoop]: Abstraction has 9700 states and 45506 transitions. [2021-11-23 03:16:18,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:18,250 INFO L276 IsEmpty]: Start isEmpty. Operand 9700 states and 45506 transitions. [2021-11-23 03:16:18,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:16:18,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:18,276 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:18,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:18,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-23 03:16:18,477 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:18,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:18,477 INFO L85 PathProgramCache]: Analyzing trace with hash 195832456, now seen corresponding path program 57 times [2021-11-23 03:16:18,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:18,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416401950] [2021-11-23 03:16:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:18,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:16:18,621 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:18,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416401950] [2021-11-23 03:16:18,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416401950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:18,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436731317] [2021-11-23 03:16:18,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:16:18,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:18,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:18,624 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:18,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-23 03:16:18,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:16:18,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:16:18,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:16:18,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:16:18,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:16:19,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436731317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:19,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448062795] [2021-11-23 03:16:19,090 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:19,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:19,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-11-23 03:16:19,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258214311] [2021-11-23 03:16:19,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:19,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:16:19,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:19,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:16:19,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:16:19,092 INFO L87 Difference]: Start difference. First operand 9700 states and 45506 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:20,437 INFO L93 Difference]: Finished difference Result 12642 states and 57532 transitions. [2021-11-23 03:16:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:16:20,438 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 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 24 [2021-11-23 03:16:20,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:20,486 INFO L225 Difference]: With dead ends: 12642 [2021-11-23 03:16:20,486 INFO L226 Difference]: Without dead ends: 12630 [2021-11-23 03:16:20,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:16:20,487 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:20,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 66 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 03:16:20,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12630 states. [2021-11-23 03:16:20,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12630 to 10334. [2021-11-23 03:16:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10334 states, 10333 states have (on average 4.738604471111971) internal successors, (48964), 10333 states have internal predecessors, (48964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:20,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10334 states to 10334 states and 48964 transitions. [2021-11-23 03:16:20,853 INFO L78 Accepts]: Start accepts. Automaton has 10334 states and 48964 transitions. Word has length 24 [2021-11-23 03:16:20,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:20,854 INFO L470 AbstractCegarLoop]: Abstraction has 10334 states and 48964 transitions. [2021-11-23 03:16:20,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:20,854 INFO L276 IsEmpty]: Start isEmpty. Operand 10334 states and 48964 transitions. [2021-11-23 03:16:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:16:20,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:20,879 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:20,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:21,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-23 03:16:21,081 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:21,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:21,082 INFO L85 PathProgramCache]: Analyzing trace with hash 328950350, now seen corresponding path program 58 times [2021-11-23 03:16:21,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:21,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198152421] [2021-11-23 03:16:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:21,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:21,239 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:21,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198152421] [2021-11-23 03:16:21,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198152421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:21,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778671061] [2021-11-23 03:16:21,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:16:21,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:21,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:21,247 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:21,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-23 03:16:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:21,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:16:21,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:21,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:21,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778671061] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:21,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [834708771] [2021-11-23 03:16:21,576 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:21,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:21,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2021-11-23 03:16:21,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881369238] [2021-11-23 03:16:21,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:21,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:16:21,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:21,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:16:21,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:16:21,577 INFO L87 Difference]: Start difference. First operand 10334 states and 48964 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:23,911 INFO L93 Difference]: Finished difference Result 15592 states and 69816 transitions. [2021-11-23 03:16:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 03:16:23,912 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 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 24 [2021-11-23 03:16:23,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:23,964 INFO L225 Difference]: With dead ends: 15592 [2021-11-23 03:16:23,964 INFO L226 Difference]: Without dead ends: 15584 [2021-11-23 03:16:23,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 03:16:23,967 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 205 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:23,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 65 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 03:16:23,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15584 states. [2021-11-23 03:16:24,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15584 to 9648. [2021-11-23 03:16:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9648 states, 9647 states have (on average 4.737742303306727) internal successors, (45705), 9647 states have internal predecessors, (45705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9648 states to 9648 states and 45705 transitions. [2021-11-23 03:16:24,311 INFO L78 Accepts]: Start accepts. Automaton has 9648 states and 45705 transitions. Word has length 24 [2021-11-23 03:16:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:24,311 INFO L470 AbstractCegarLoop]: Abstraction has 9648 states and 45705 transitions. [2021-11-23 03:16:24,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 9648 states and 45705 transitions. [2021-11-23 03:16:24,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:16:24,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:24,333 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:24,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:24,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:24,533 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:24,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:24,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1910951254, now seen corresponding path program 59 times [2021-11-23 03:16:24,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:24,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995370969] [2021-11-23 03:16:24,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:24,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:24,642 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:24,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995370969] [2021-11-23 03:16:24,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995370969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:24,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318965391] [2021-11-23 03:16:24,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:16:24,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:24,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:24,644 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:24,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-23 03:16:24,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:16:24,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:16:24,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:16:24,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:24,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:24,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318965391] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:24,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1488277587] [2021-11-23 03:16:24,946 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:24,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:24,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2021-11-23 03:16:24,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95397014] [2021-11-23 03:16:24,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:24,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:16:24,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:24,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:16:24,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:16:24,948 INFO L87 Difference]: Start difference. First operand 9648 states and 45705 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:26,280 INFO L93 Difference]: Finished difference Result 11932 states and 54559 transitions. [2021-11-23 03:16:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 03:16:26,280 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 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 24 [2021-11-23 03:16:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:26,317 INFO L225 Difference]: With dead ends: 11932 [2021-11-23 03:16:26,317 INFO L226 Difference]: Without dead ends: 11860 [2021-11-23 03:16:26,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:16:26,317 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 177 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:26,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 81 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:16:26,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11860 states. [2021-11-23 03:16:26,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11860 to 10342. [2021-11-23 03:16:26,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10342 states, 10341 states have (on average 4.766753698868581) internal successors, (49293), 10341 states have internal predecessors, (49293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10342 states to 10342 states and 49293 transitions. [2021-11-23 03:16:26,689 INFO L78 Accepts]: Start accepts. Automaton has 10342 states and 49293 transitions. Word has length 24 [2021-11-23 03:16:26,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:26,689 INFO L470 AbstractCegarLoop]: Abstraction has 10342 states and 49293 transitions. [2021-11-23 03:16:26,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 10342 states and 49293 transitions. [2021-11-23 03:16:26,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:16:26,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:26,713 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:26,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:26,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-11-23 03:16:26,913 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:26,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:26,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1652655280, now seen corresponding path program 60 times [2021-11-23 03:16:26,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:26,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609434751] [2021-11-23 03:16:26,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:26,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:27,046 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:27,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609434751] [2021-11-23 03:16:27,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609434751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:27,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046892807] [2021-11-23 03:16:27,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:16:27,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:27,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:27,048 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:27,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-23 03:16:27,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:16:27,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:16:27,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:16:27,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:16:27,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:16:27,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046892807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:27,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2018687948] [2021-11-23 03:16:27,387 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:27,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:27,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2021-11-23 03:16:27,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480629017] [2021-11-23 03:16:27,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:27,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:16:27,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:27,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:16:27,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:16:27,389 INFO L87 Difference]: Start difference. First operand 10342 states and 49293 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:32,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:32,197 INFO L93 Difference]: Finished difference Result 14226 states and 64952 transitions. [2021-11-23 03:16:32,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-23 03:16:32,198 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 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 24 [2021-11-23 03:16:32,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:32,255 INFO L225 Difference]: With dead ends: 14226 [2021-11-23 03:16:32,255 INFO L226 Difference]: Without dead ends: 14160 [2021-11-23 03:16:32,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=691, Invalid=3731, Unknown=0, NotChecked=0, Total=4422 [2021-11-23 03:16:32,257 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 214 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 1825 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:32,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 105 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1825 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 03:16:32,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14160 states. [2021-11-23 03:16:32,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14160 to 11560. [2021-11-23 03:16:32,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11560 states, 11559 states have (on average 4.790898866683969) internal successors, (55378), 11559 states have internal predecessors, (55378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11560 states to 11560 states and 55378 transitions. [2021-11-23 03:16:32,842 INFO L78 Accepts]: Start accepts. Automaton has 11560 states and 55378 transitions. Word has length 24 [2021-11-23 03:16:32,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:32,842 INFO L470 AbstractCegarLoop]: Abstraction has 11560 states and 55378 transitions. [2021-11-23 03:16:32,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 11560 states and 55378 transitions. [2021-11-23 03:16:32,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:16:32,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:32,884 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:32,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:33,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-11-23 03:16:33,088 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:33,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:33,088 INFO L85 PathProgramCache]: Analyzing trace with hash -720536880, now seen corresponding path program 61 times [2021-11-23 03:16:33,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:33,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651810595] [2021-11-23 03:16:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:33,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:16:33,214 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:33,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651810595] [2021-11-23 03:16:33,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651810595] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:33,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357614195] [2021-11-23 03:16:33,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:16:33,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:33,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:33,216 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:33,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-23 03:16:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:33,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:16:33,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:16:33,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:16:33,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357614195] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:33,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1406567379] [2021-11-23 03:16:33,567 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:33,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:33,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-11-23 03:16:33,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464203381] [2021-11-23 03:16:33,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:33,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:16:33,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:33,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:16:33,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:16:33,569 INFO L87 Difference]: Start difference. First operand 11560 states and 55378 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:34,477 INFO L93 Difference]: Finished difference Result 13264 states and 61413 transitions. [2021-11-23 03:16:34,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:16:34,478 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 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 24 [2021-11-23 03:16:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:34,523 INFO L225 Difference]: With dead ends: 13264 [2021-11-23 03:16:34,524 INFO L226 Difference]: Without dead ends: 13248 [2021-11-23 03:16:34,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:16:34,524 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 179 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:34,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 58 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:16:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13248 states. [2021-11-23 03:16:34,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13248 to 11428. [2021-11-23 03:16:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11428 states, 11427 states have (on average 4.791546337621423) internal successors, (54753), 11427 states have internal predecessors, (54753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:34,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11428 states to 11428 states and 54753 transitions. [2021-11-23 03:16:34,859 INFO L78 Accepts]: Start accepts. Automaton has 11428 states and 54753 transitions. Word has length 24 [2021-11-23 03:16:34,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:34,859 INFO L470 AbstractCegarLoop]: Abstraction has 11428 states and 54753 transitions. [2021-11-23 03:16:34,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:34,859 INFO L276 IsEmpty]: Start isEmpty. Operand 11428 states and 54753 transitions. [2021-11-23 03:16:34,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:16:34,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:34,886 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:34,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-11-23 03:16:35,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:35,087 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:35,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:35,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2066656866, now seen corresponding path program 62 times [2021-11-23 03:16:35,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:35,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759208314] [2021-11-23 03:16:35,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:35,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:16:35,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:35,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759208314] [2021-11-23 03:16:35,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759208314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:35,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109494718] [2021-11-23 03:16:35,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:16:35,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:35,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:35,222 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:35,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-23 03:16:35,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:16:35,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:16:35,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:16:35,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:16:35,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:35,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:16:35,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109494718] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:35,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1442952729] [2021-11-23 03:16:35,605 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:35,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:35,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-23 03:16:35,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359180915] [2021-11-23 03:16:35,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:35,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:16:35,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:35,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:16:35,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:16:35,608 INFO L87 Difference]: Start difference. First operand 11428 states and 54753 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:36,731 INFO L93 Difference]: Finished difference Result 14396 states and 66686 transitions. [2021-11-23 03:16:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:16:36,731 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 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 24 [2021-11-23 03:16:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:36,783 INFO L225 Difference]: With dead ends: 14396 [2021-11-23 03:16:36,783 INFO L226 Difference]: Without dead ends: 14384 [2021-11-23 03:16:36,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:16:36,784 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 207 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:36,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 102 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 03:16:36,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14384 states. [2021-11-23 03:16:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14384 to 11656. [2021-11-23 03:16:37,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11656 states, 11655 states have (on average 4.798541398541398) internal successors, (55927), 11655 states have internal predecessors, (55927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11656 states to 11656 states and 55927 transitions. [2021-11-23 03:16:37,240 INFO L78 Accepts]: Start accepts. Automaton has 11656 states and 55927 transitions. Word has length 24 [2021-11-23 03:16:37,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:37,240 INFO L470 AbstractCegarLoop]: Abstraction has 11656 states and 55927 transitions. [2021-11-23 03:16:37,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:37,241 INFO L276 IsEmpty]: Start isEmpty. Operand 11656 states and 55927 transitions. [2021-11-23 03:16:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:16:37,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:37,267 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:37,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:37,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:37,468 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:37,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:37,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1154346658, now seen corresponding path program 63 times [2021-11-23 03:16:37,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:37,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478479561] [2021-11-23 03:16:37,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:37,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:37,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:37,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478479561] [2021-11-23 03:16:37,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478479561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:37,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819250605] [2021-11-23 03:16:37,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:16:37,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:37,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:37,599 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:37,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-23 03:16:37,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:16:37,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:16:37,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:16:37,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:37,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:16:37,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819250605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:37,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2084261283] [2021-11-23 03:16:37,906 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:37,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:37,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-23 03:16:37,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403999067] [2021-11-23 03:16:37,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:37,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:16:37,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:37,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:16:37,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:16:37,907 INFO L87 Difference]: Start difference. First operand 11656 states and 55927 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:38,995 INFO L93 Difference]: Finished difference Result 14852 states and 68997 transitions. [2021-11-23 03:16:38,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:16:38,995 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 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 24 [2021-11-23 03:16:38,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:39,045 INFO L225 Difference]: With dead ends: 14852 [2021-11-23 03:16:39,045 INFO L226 Difference]: Without dead ends: 14842 [2021-11-23 03:16:39,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:16:39,045 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 216 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:39,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 83 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:16:39,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14842 states. [2021-11-23 03:16:39,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14842 to 11548. [2021-11-23 03:16:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11548 states, 11547 states have (on average 4.787304061661038) internal successors, (55279), 11547 states have internal predecessors, (55279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11548 states to 11548 states and 55279 transitions. [2021-11-23 03:16:39,402 INFO L78 Accepts]: Start accepts. Automaton has 11548 states and 55279 transitions. Word has length 24 [2021-11-23 03:16:39,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:39,402 INFO L470 AbstractCegarLoop]: Abstraction has 11548 states and 55279 transitions. [2021-11-23 03:16:39,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 11548 states and 55279 transitions. [2021-11-23 03:16:39,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:16:39,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:39,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:39,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:39,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-11-23 03:16:39,629 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:39,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:39,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1135144916, now seen corresponding path program 64 times [2021-11-23 03:16:39,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:39,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730279969] [2021-11-23 03:16:39,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:39,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:39,819 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:39,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730279969] [2021-11-23 03:16:39,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730279969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:39,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800663419] [2021-11-23 03:16:39,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:16:39,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:39,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:39,821 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:39,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-23 03:16:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:39,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:16:39,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:40,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:40,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:40,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800663419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:40,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [266459139] [2021-11-23 03:16:40,703 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:40,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:40,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2021-11-23 03:16:40,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535603253] [2021-11-23 03:16:40,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:40,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:16:40,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:40,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:16:40,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:16:40,705 INFO L87 Difference]: Start difference. First operand 11548 states and 55279 transitions. Second operand has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:42,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:42,291 INFO L93 Difference]: Finished difference Result 12646 states and 59472 transitions. [2021-11-23 03:16:42,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 03:16:42,292 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 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 25 [2021-11-23 03:16:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:42,339 INFO L225 Difference]: With dead ends: 12646 [2021-11-23 03:16:42,339 INFO L226 Difference]: Without dead ends: 12612 [2021-11-23 03:16:42,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:16:42,339 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 96 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:42,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 100 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 03:16:42,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12612 states. [2021-11-23 03:16:42,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12612 to 12134. [2021-11-23 03:16:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12134 states, 12133 states have (on average 4.78018626885354) internal successors, (57998), 12133 states have internal predecessors, (57998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12134 states to 12134 states and 57998 transitions. [2021-11-23 03:16:42,699 INFO L78 Accepts]: Start accepts. Automaton has 12134 states and 57998 transitions. Word has length 25 [2021-11-23 03:16:42,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:42,700 INFO L470 AbstractCegarLoop]: Abstraction has 12134 states and 57998 transitions. [2021-11-23 03:16:42,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:42,700 INFO L276 IsEmpty]: Start isEmpty. Operand 12134 states and 57998 transitions. [2021-11-23 03:16:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:16:42,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:42,729 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:42,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:42,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:42,930 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:42,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:42,930 INFO L85 PathProgramCache]: Analyzing trace with hash 581202220, now seen corresponding path program 65 times [2021-11-23 03:16:42,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:42,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157241273] [2021-11-23 03:16:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:42,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:43,227 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:43,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157241273] [2021-11-23 03:16:43,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157241273] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:43,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813511983] [2021-11-23 03:16:43,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:16:43,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:43,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:43,235 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:43,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-23 03:16:43,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:16:43,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:16:43,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:16:43,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:43,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:44,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813511983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:44,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [718616877] [2021-11-23 03:16:44,185 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:44,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:44,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2021-11-23 03:16:44,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935341563] [2021-11-23 03:16:44,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:44,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:16:44,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:44,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:16:44,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:16:44,187 INFO L87 Difference]: Start difference. First operand 12134 states and 57998 transitions. Second operand has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:45,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:45,778 INFO L93 Difference]: Finished difference Result 12879 states and 60579 transitions. [2021-11-23 03:16:45,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:16:45,778 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 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 25 [2021-11-23 03:16:45,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:45,831 INFO L225 Difference]: With dead ends: 12879 [2021-11-23 03:16:45,831 INFO L226 Difference]: Without dead ends: 12858 [2021-11-23 03:16:45,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:16:45,832 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 109 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:45,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 97 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 03:16:45,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12858 states. [2021-11-23 03:16:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12858 to 12436. [2021-11-23 03:16:46,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12436 states, 12435 states have (on average 4.772255729794933) internal successors, (59343), 12435 states have internal predecessors, (59343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12436 states to 12436 states and 59343 transitions. [2021-11-23 03:16:46,451 INFO L78 Accepts]: Start accepts. Automaton has 12436 states and 59343 transitions. Word has length 25 [2021-11-23 03:16:46,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:46,452 INFO L470 AbstractCegarLoop]: Abstraction has 12436 states and 59343 transitions. [2021-11-23 03:16:46,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:46,452 INFO L276 IsEmpty]: Start isEmpty. Operand 12436 states and 59343 transitions. [2021-11-23 03:16:46,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:16:46,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:46,488 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:46,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:46,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-23 03:16:46,688 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:46,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:46,689 INFO L85 PathProgramCache]: Analyzing trace with hash -158356244, now seen corresponding path program 66 times [2021-11-23 03:16:46,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:46,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616383155] [2021-11-23 03:16:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:46,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:46,979 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:46,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616383155] [2021-11-23 03:16:46,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616383155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:46,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882770906] [2021-11-23 03:16:46,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:16:46,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:46,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:46,981 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:46,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-23 03:16:47,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:16:47,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:16:47,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:16:47,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:47,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:47,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882770906] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:47,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1633787899] [2021-11-23 03:16:47,978 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:47,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:47,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2021-11-23 03:16:47,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517539849] [2021-11-23 03:16:47,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:47,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:16:47,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:47,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:16:47,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:16:47,979 INFO L87 Difference]: Start difference. First operand 12436 states and 59343 transitions. Second operand has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:49,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:49,280 INFO L93 Difference]: Finished difference Result 13175 states and 61949 transitions. [2021-11-23 03:16:49,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:16:49,281 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 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 25 [2021-11-23 03:16:49,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:49,333 INFO L225 Difference]: With dead ends: 13175 [2021-11-23 03:16:49,333 INFO L226 Difference]: Without dead ends: 13154 [2021-11-23 03:16:49,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:16:49,334 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 108 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:49,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 89 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 03:16:49,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13154 states. [2021-11-23 03:16:49,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13154 to 12720. [2021-11-23 03:16:49,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12720 states, 12719 states have (on average 4.767434546741096) internal successors, (60637), 12719 states have internal predecessors, (60637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:50,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12720 states to 12720 states and 60637 transitions. [2021-11-23 03:16:50,005 INFO L78 Accepts]: Start accepts. Automaton has 12720 states and 60637 transitions. Word has length 25 [2021-11-23 03:16:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:50,005 INFO L470 AbstractCegarLoop]: Abstraction has 12720 states and 60637 transitions. [2021-11-23 03:16:50,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 12720 states and 60637 transitions. [2021-11-23 03:16:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:16:50,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:50,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:50,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:50,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:50,250 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:50,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:50,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2064337158, now seen corresponding path program 67 times [2021-11-23 03:16:50,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:50,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510729190] [2021-11-23 03:16:50,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:50,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:50,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:50,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510729190] [2021-11-23 03:16:50,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510729190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:50,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880221576] [2021-11-23 03:16:50,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:16:50,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:50,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:50,482 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:50,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-23 03:16:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:50,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:16:50,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:51,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:51,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880221576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:51,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1336461285] [2021-11-23 03:16:51,414 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:51,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:51,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2021-11-23 03:16:51,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650208670] [2021-11-23 03:16:51,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:51,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:16:51,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:51,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:16:51,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:16:51,416 INFO L87 Difference]: Start difference. First operand 12720 states and 60637 transitions. Second operand has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:52,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:52,589 INFO L93 Difference]: Finished difference Result 13581 states and 63722 transitions. [2021-11-23 03:16:52,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:16:52,589 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 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 25 [2021-11-23 03:16:52,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:52,651 INFO L225 Difference]: With dead ends: 13581 [2021-11-23 03:16:52,651 INFO L226 Difference]: Without dead ends: 13544 [2021-11-23 03:16:52,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:16:52,652 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 109 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:52,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 66 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:16:52,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13544 states. [2021-11-23 03:16:53,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13544 to 12986. [2021-11-23 03:16:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12986 states, 12985 states have (on average 4.770427416249519) internal successors, (61944), 12985 states have internal predecessors, (61944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12986 states to 12986 states and 61944 transitions. [2021-11-23 03:16:53,322 INFO L78 Accepts]: Start accepts. Automaton has 12986 states and 61944 transitions. Word has length 25 [2021-11-23 03:16:53,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:53,322 INFO L470 AbstractCegarLoop]: Abstraction has 12986 states and 61944 transitions. [2021-11-23 03:16:53,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:53,323 INFO L276 IsEmpty]: Start isEmpty. Operand 12986 states and 61944 transitions. [2021-11-23 03:16:53,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:16:53,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:53,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:53,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:53,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-23 03:16:53,565 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:53,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:53,566 INFO L85 PathProgramCache]: Analyzing trace with hash -2046611412, now seen corresponding path program 68 times [2021-11-23 03:16:53,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:53,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607777759] [2021-11-23 03:16:53,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:53,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:53,863 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:53,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607777759] [2021-11-23 03:16:53,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607777759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:53,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642272064] [2021-11-23 03:16:53,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:16:53,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:53,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:53,866 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:53,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-23 03:16:54,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:16:54,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:16:54,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:16:54,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:54,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:54,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642272064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:54,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1072603784] [2021-11-23 03:16:54,786 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:54,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:54,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2021-11-23 03:16:54,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009881123] [2021-11-23 03:16:54,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:54,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:16:54,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:54,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:16:54,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:16:54,788 INFO L87 Difference]: Start difference. First operand 12986 states and 61944 transitions. Second operand has 19 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:56,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:56,617 INFO L93 Difference]: Finished difference Result 13848 states and 65099 transitions. [2021-11-23 03:16:56,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:16:56,618 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 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 25 [2021-11-23 03:16:56,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:56,666 INFO L225 Difference]: With dead ends: 13848 [2021-11-23 03:16:56,667 INFO L226 Difference]: Without dead ends: 13832 [2021-11-23 03:16:56,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:16:56,667 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 105 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:56,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 111 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 03:16:56,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13832 states. [2021-11-23 03:16:57,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13832 to 13314. [2021-11-23 03:16:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13314 states, 13313 states have (on average 4.769022759708555) internal successors, (63490), 13313 states have internal predecessors, (63490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:57,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13314 states to 13314 states and 63490 transitions. [2021-11-23 03:16:57,191 INFO L78 Accepts]: Start accepts. Automaton has 13314 states and 63490 transitions. Word has length 25 [2021-11-23 03:16:57,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:57,192 INFO L470 AbstractCegarLoop]: Abstraction has 13314 states and 63490 transitions. [2021-11-23 03:16:57,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:57,192 INFO L276 IsEmpty]: Start isEmpty. Operand 13314 states and 63490 transitions. [2021-11-23 03:16:57,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:16:57,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:57,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:57,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:57,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:57,427 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:16:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:57,428 INFO L85 PathProgramCache]: Analyzing trace with hash -514236952, now seen corresponding path program 69 times [2021-11-23 03:16:57,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:57,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270015997] [2021-11-23 03:16:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:57,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:57,641 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:57,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270015997] [2021-11-23 03:16:57,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270015997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:57,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259987045] [2021-11-23 03:16:57,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:16:57,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:57,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:57,652 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:57,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-23 03:16:57,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:16:57,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:16:57,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:16:57,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:58,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:58,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259987045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:58,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1728600375] [2021-11-23 03:16:58,401 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:16:58,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:58,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:16:58,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192903536] [2021-11-23 03:16:58,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:58,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:16:58,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:58,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:16:58,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:16:58,402 INFO L87 Difference]: Start difference. First operand 13314 states and 63490 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:16:59,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:59,571 INFO L93 Difference]: Finished difference Result 13722 states and 64794 transitions. [2021-11-23 03:16:59,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:16:59,571 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:16:59,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:59,818 INFO L225 Difference]: With dead ends: 13722 [2021-11-23 03:16:59,823 INFO L226 Difference]: Without dead ends: 13708 [2021-11-23 03:16:59,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:16:59,824 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 86 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:59,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 87 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:16:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13708 states. [2021-11-23 03:17:00,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13708 to 13398. [2021-11-23 03:17:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13398 states, 13397 states have (on average 4.769649921624244) internal successors, (63899), 13397 states have internal predecessors, (63899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:00,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13398 states to 13398 states and 63899 transitions. [2021-11-23 03:17:00,512 INFO L78 Accepts]: Start accepts. Automaton has 13398 states and 63899 transitions. Word has length 25 [2021-11-23 03:17:00,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:00,512 INFO L470 AbstractCegarLoop]: Abstraction has 13398 states and 63899 transitions. [2021-11-23 03:17:00,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:00,512 INFO L276 IsEmpty]: Start isEmpty. Operand 13398 states and 63899 transitions. [2021-11-23 03:17:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:17:00,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:00,569 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:00,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:00,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:00,774 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:17:00,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:00,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1231047084, now seen corresponding path program 70 times [2021-11-23 03:17:00,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:00,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379747487] [2021-11-23 03:17:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:00,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:01,006 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:01,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379747487] [2021-11-23 03:17:01,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379747487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:01,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705858597] [2021-11-23 03:17:01,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:17:01,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:01,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:01,008 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:01,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-23 03:17:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:01,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:17:01,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:01,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:01,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705858597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:01,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [594630858] [2021-11-23 03:17:01,971 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:17:01,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:01,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:17:01,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303092856] [2021-11-23 03:17:01,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:01,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:17:01,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:01,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:17:01,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:01,973 INFO L87 Difference]: Start difference. First operand 13398 states and 63899 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:03,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:03,541 INFO L93 Difference]: Finished difference Result 14147 states and 66360 transitions. [2021-11-23 03:17:03,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:17:03,542 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:17:03,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:03,604 INFO L225 Difference]: With dead ends: 14147 [2021-11-23 03:17:03,604 INFO L226 Difference]: Without dead ends: 14100 [2021-11-23 03:17:03,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:03,604 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 106 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:03,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 93 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 03:17:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14100 states. [2021-11-23 03:17:04,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14100 to 13542. [2021-11-23 03:17:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13542 states, 13541 states have (on average 4.768554759618935) internal successors, (64571), 13541 states have internal predecessors, (64571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13542 states to 13542 states and 64571 transitions. [2021-11-23 03:17:04,335 INFO L78 Accepts]: Start accepts. Automaton has 13542 states and 64571 transitions. Word has length 25 [2021-11-23 03:17:04,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:04,335 INFO L470 AbstractCegarLoop]: Abstraction has 13542 states and 64571 transitions. [2021-11-23 03:17:04,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:04,335 INFO L276 IsEmpty]: Start isEmpty. Operand 13542 states and 64571 transitions. [2021-11-23 03:17:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:17:04,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:04,375 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:04,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:04,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-11-23 03:17:04,575 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:17:04,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:04,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1798536424, now seen corresponding path program 71 times [2021-11-23 03:17:04,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:04,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044029267] [2021-11-23 03:17:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:04,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:04,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:04,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044029267] [2021-11-23 03:17:04,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044029267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:04,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129021580] [2021-11-23 03:17:04,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:17:04,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:04,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:04,779 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:04,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-23 03:17:04,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:17:04,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:17:04,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:17:04,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:05,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:17:05,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129021580] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:05,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2101161705] [2021-11-23 03:17:05,716 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:17:05,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:05,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2021-11-23 03:17:05,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208542858] [2021-11-23 03:17:05,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:05,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:17:05,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:05,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:17:05,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:05,718 INFO L87 Difference]: Start difference. First operand 13542 states and 64571 transitions. Second operand has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:08,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:08,020 INFO L93 Difference]: Finished difference Result 14586 states and 68234 transitions. [2021-11-23 03:17:08,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:17:08,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 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 25 [2021-11-23 03:17:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:08,079 INFO L225 Difference]: With dead ends: 14586 [2021-11-23 03:17:08,079 INFO L226 Difference]: Without dead ends: 14552 [2021-11-23 03:17:08,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:08,079 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 120 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:08,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 112 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1372 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 03:17:08,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14552 states. [2021-11-23 03:17:08,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14552 to 13796. [2021-11-23 03:17:08,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13796 states, 13795 states have (on average 4.774555998550199) internal successors, (65865), 13795 states have internal predecessors, (65865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:08,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13796 states to 13796 states and 65865 transitions. [2021-11-23 03:17:08,781 INFO L78 Accepts]: Start accepts. Automaton has 13796 states and 65865 transitions. Word has length 25 [2021-11-23 03:17:08,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:08,782 INFO L470 AbstractCegarLoop]: Abstraction has 13796 states and 65865 transitions. [2021-11-23 03:17:08,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:08,782 INFO L276 IsEmpty]: Start isEmpty. Operand 13796 states and 65865 transitions. [2021-11-23 03:17:08,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:17:08,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:08,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:08,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:09,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-11-23 03:17:09,033 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:17:09,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:09,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1146409620, now seen corresponding path program 72 times [2021-11-23 03:17:09,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:09,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622547887] [2021-11-23 03:17:09,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:09,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:09,317 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:09,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622547887] [2021-11-23 03:17:09,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622547887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:09,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168191287] [2021-11-23 03:17:09,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:17:09,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:09,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:09,320 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:09,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-23 03:17:09,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:17:09,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:17:09,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:17:09,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:09,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:10,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168191287] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:10,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [447479173] [2021-11-23 03:17:10,280 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:17:10,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:10,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:17:10,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771143537] [2021-11-23 03:17:10,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:10,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:17:10,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:10,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:17:10,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:10,281 INFO L87 Difference]: Start difference. First operand 13796 states and 65865 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:11,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:11,712 INFO L93 Difference]: Finished difference Result 14677 states and 68890 transitions. [2021-11-23 03:17:11,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:17:11,713 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:17:11,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:11,771 INFO L225 Difference]: With dead ends: 14677 [2021-11-23 03:17:11,771 INFO L226 Difference]: Without dead ends: 14618 [2021-11-23 03:17:11,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:11,772 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 101 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:11,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 73 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 03:17:11,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14618 states. [2021-11-23 03:17:12,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14618 to 13968. [2021-11-23 03:17:12,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13968 states, 13967 states have (on average 4.776759504546431) internal successors, (66717), 13967 states have internal predecessors, (66717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:12,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13968 states to 13968 states and 66717 transitions. [2021-11-23 03:17:12,423 INFO L78 Accepts]: Start accepts. Automaton has 13968 states and 66717 transitions. Word has length 25 [2021-11-23 03:17:12,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:12,423 INFO L470 AbstractCegarLoop]: Abstraction has 13968 states and 66717 transitions. [2021-11-23 03:17:12,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:12,423 INFO L276 IsEmpty]: Start isEmpty. Operand 13968 states and 66717 transitions. [2021-11-23 03:17:12,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:17:12,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:12,462 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:12,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:12,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:12,663 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:17:12,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:12,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1940692456, now seen corresponding path program 73 times [2021-11-23 03:17:12,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:12,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473673728] [2021-11-23 03:17:12,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:12,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:12,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:12,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473673728] [2021-11-23 03:17:12,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473673728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:12,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748570257] [2021-11-23 03:17:12,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:17:12,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:12,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:12,912 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:12,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-23 03:17:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:13,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:17:13,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:13,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:17:13,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748570257] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:13,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [5262375] [2021-11-23 03:17:13,770 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:17:13,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:13,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:17:13,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657722135] [2021-11-23 03:17:13,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:13,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:17:13,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:13,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:17:13,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:13,773 INFO L87 Difference]: Start difference. First operand 13968 states and 66717 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:15,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:15,323 INFO L93 Difference]: Finished difference Result 14785 states and 69416 transitions. [2021-11-23 03:17:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:17:15,323 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:17:15,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:15,390 INFO L225 Difference]: With dead ends: 14785 [2021-11-23 03:17:15,390 INFO L226 Difference]: Without dead ends: 14762 [2021-11-23 03:17:15,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:15,391 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 145 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:15,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 90 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 03:17:15,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14762 states. [2021-11-23 03:17:15,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14762 to 14122. [2021-11-23 03:17:15,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14122 states, 14121 states have (on average 4.776927979604844) internal successors, (67455), 14121 states have internal predecessors, (67455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:16,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14122 states to 14122 states and 67455 transitions. [2021-11-23 03:17:16,015 INFO L78 Accepts]: Start accepts. Automaton has 14122 states and 67455 transitions. Word has length 25 [2021-11-23 03:17:16,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:16,015 INFO L470 AbstractCegarLoop]: Abstraction has 14122 states and 67455 transitions. [2021-11-23 03:17:16,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:16,016 INFO L276 IsEmpty]: Start isEmpty. Operand 14122 states and 67455 transitions. [2021-11-23 03:17:16,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:17:16,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:16,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:16,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:16,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:16,252 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:17:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:16,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1830088300, now seen corresponding path program 74 times [2021-11-23 03:17:16,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:16,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518906591] [2021-11-23 03:17:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:16,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:16,468 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:16,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518906591] [2021-11-23 03:17:16,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518906591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:16,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773371659] [2021-11-23 03:17:16,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:17:16,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:16,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:16,469 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:16,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-23 03:17:16,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:17:16,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:17:16,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:17:16,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:16,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:17,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773371659] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:17,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759126301] [2021-11-23 03:17:17,204 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:17:17,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:17,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:17:17,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026349141] [2021-11-23 03:17:17,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:17,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:17:17,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:17,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:17:17,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:17,206 INFO L87 Difference]: Start difference. First operand 14122 states and 67455 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:18,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:18,823 INFO L93 Difference]: Finished difference Result 15387 states and 71937 transitions. [2021-11-23 03:17:18,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:17:18,824 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:17:18,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:18,874 INFO L225 Difference]: With dead ends: 15387 [2021-11-23 03:17:18,874 INFO L226 Difference]: Without dead ends: 15316 [2021-11-23 03:17:18,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:18,874 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 133 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:18,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 89 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 03:17:18,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15316 states. [2021-11-23 03:17:19,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15316 to 14268. [2021-11-23 03:17:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14268 states, 14267 states have (on average 4.783276091680101) internal successors, (68243), 14267 states have internal predecessors, (68243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:19,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14268 states to 14268 states and 68243 transitions. [2021-11-23 03:17:19,501 INFO L78 Accepts]: Start accepts. Automaton has 14268 states and 68243 transitions. Word has length 25 [2021-11-23 03:17:19,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:19,502 INFO L470 AbstractCegarLoop]: Abstraction has 14268 states and 68243 transitions. [2021-11-23 03:17:19,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:19,502 INFO L276 IsEmpty]: Start isEmpty. Operand 14268 states and 68243 transitions. [2021-11-23 03:17:19,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:17:19,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:19,539 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:19,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:19,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-11-23 03:17:19,739 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:17:19,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:19,740 INFO L85 PathProgramCache]: Analyzing trace with hash -672876948, now seen corresponding path program 75 times [2021-11-23 03:17:19,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:19,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199081505] [2021-11-23 03:17:19,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:19,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:19,934 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:19,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199081505] [2021-11-23 03:17:19,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199081505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:19,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562070453] [2021-11-23 03:17:19,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:17:19,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:19,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:19,935 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:19,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-23 03:17:20,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:17:20,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:17:20,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:17:20,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:20,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:17:21,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562070453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:21,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1695473835] [2021-11-23 03:17:21,031 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:17:21,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:21,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2021-11-23 03:17:21,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467710898] [2021-11-23 03:17:21,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:21,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:17:21,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:21,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:17:21,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:17:21,033 INFO L87 Difference]: Start difference. First operand 14268 states and 68243 transitions. Second operand has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:22,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:22,791 INFO L93 Difference]: Finished difference Result 15093 states and 70837 transitions. [2021-11-23 03:17:22,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:17:22,792 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 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 25 [2021-11-23 03:17:22,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:22,870 INFO L225 Difference]: With dead ends: 15093 [2021-11-23 03:17:22,870 INFO L226 Difference]: Without dead ends: 15066 [2021-11-23 03:17:22,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:17:22,871 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 99 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:22,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 75 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 03:17:22,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15066 states. [2021-11-23 03:17:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15066 to 14316. [2021-11-23 03:17:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14316 states, 14315 states have (on average 4.784701362207475) internal successors, (68493), 14315 states have internal predecessors, (68493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14316 states to 14316 states and 68493 transitions. [2021-11-23 03:17:23,571 INFO L78 Accepts]: Start accepts. Automaton has 14316 states and 68493 transitions. Word has length 25 [2021-11-23 03:17:23,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:23,572 INFO L470 AbstractCegarLoop]: Abstraction has 14316 states and 68493 transitions. [2021-11-23 03:17:23,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 14316 states and 68493 transitions. [2021-11-23 03:17:23,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:17:23,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:23,612 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:23,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:23,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:23,813 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:17:23,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:23,813 INFO L85 PathProgramCache]: Analyzing trace with hash -105387608, now seen corresponding path program 76 times [2021-11-23 03:17:23,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:23,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962309483] [2021-11-23 03:17:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:23,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:24,033 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:24,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962309483] [2021-11-23 03:17:24,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962309483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:24,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505420215] [2021-11-23 03:17:24,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:17:24,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:24,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:24,036 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:24,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-23 03:17:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:24,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:17:24,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:24,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:17:24,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505420215] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:24,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [777590182] [2021-11-23 03:17:24,989 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:17:24,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:24,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:17:24,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506393453] [2021-11-23 03:17:24,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:24,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:17:24,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:24,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:17:24,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:24,990 INFO L87 Difference]: Start difference. First operand 14316 states and 68493 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:26,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:26,407 INFO L93 Difference]: Finished difference Result 15095 states and 71187 transitions. [2021-11-23 03:17:26,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:17:26,408 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:17:26,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:26,469 INFO L225 Difference]: With dead ends: 15095 [2021-11-23 03:17:26,469 INFO L226 Difference]: Without dead ends: 15072 [2021-11-23 03:17:26,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:26,469 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 127 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:26,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 77 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 03:17:26,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15072 states. [2021-11-23 03:17:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15072 to 14410. [2021-11-23 03:17:27,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14410 states, 14409 states have (on average 4.794642237490457) internal successors, (69086), 14409 states have internal predecessors, (69086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:27,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14410 states to 14410 states and 69086 transitions. [2021-11-23 03:17:27,095 INFO L78 Accepts]: Start accepts. Automaton has 14410 states and 69086 transitions. Word has length 25 [2021-11-23 03:17:27,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:27,095 INFO L470 AbstractCegarLoop]: Abstraction has 14410 states and 69086 transitions. [2021-11-23 03:17:27,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:27,095 INFO L276 IsEmpty]: Start isEmpty. Operand 14410 states and 69086 transitions. [2021-11-23 03:17:27,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:17:27,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:27,136 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:27,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:27,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-11-23 03:17:27,340 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:17:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:27,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1304225602, now seen corresponding path program 77 times [2021-11-23 03:17:27,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:27,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506117972] [2021-11-23 03:17:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:27,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:27,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:27,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506117972] [2021-11-23 03:17:27,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506117972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:27,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504598990] [2021-11-23 03:17:27,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:17:27,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:27,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:27,560 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:27,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-23 03:17:27,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:17:27,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:17:27,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:17:27,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:28,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:17:28,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504598990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:28,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1672353309] [2021-11-23 03:17:28,327 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:17:28,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:28,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:17:28,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417863859] [2021-11-23 03:17:28,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:28,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:17:28,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:28,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:17:28,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:28,328 INFO L87 Difference]: Start difference. First operand 14410 states and 69086 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:29,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:29,857 INFO L93 Difference]: Finished difference Result 15485 states and 72774 transitions. [2021-11-23 03:17:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:17:29,858 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:17:29,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:29,937 INFO L225 Difference]: With dead ends: 15485 [2021-11-23 03:17:29,937 INFO L226 Difference]: Without dead ends: 15424 [2021-11-23 03:17:29,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:29,938 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 150 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:29,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 82 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 03:17:29,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15424 states. [2021-11-23 03:17:30,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15424 to 14526. [2021-11-23 03:17:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14526 states, 14525 states have (on average 4.8022030981067125) internal successors, (69752), 14525 states have internal predecessors, (69752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14526 states to 14526 states and 69752 transitions. [2021-11-23 03:17:30,747 INFO L78 Accepts]: Start accepts. Automaton has 14526 states and 69752 transitions. Word has length 25 [2021-11-23 03:17:30,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:30,747 INFO L470 AbstractCegarLoop]: Abstraction has 14526 states and 69752 transitions. [2021-11-23 03:17:30,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 14526 states and 69752 transitions. [2021-11-23 03:17:30,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:17:30,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:30,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:30,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:30,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:30,995 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:17:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:30,996 INFO L85 PathProgramCache]: Analyzing trace with hash 505075180, now seen corresponding path program 78 times [2021-11-23 03:17:30,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:30,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326123496] [2021-11-23 03:17:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:30,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:31,190 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:31,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326123496] [2021-11-23 03:17:31,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326123496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:31,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382050038] [2021-11-23 03:17:31,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:17:31,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:31,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:31,192 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:31,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-23 03:17:31,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:17:31,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:17:31,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:17:31,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:31,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:32,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382050038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:32,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [696457875] [2021-11-23 03:17:32,050 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:17:32,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:32,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:17:32,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501763110] [2021-11-23 03:17:32,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:32,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:17:32,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:32,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:17:32,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:32,052 INFO L87 Difference]: Start difference. First operand 14526 states and 69752 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:33,444 INFO L93 Difference]: Finished difference Result 15209 states and 71891 transitions. [2021-11-23 03:17:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:17:33,444 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:17:33,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:33,507 INFO L225 Difference]: With dead ends: 15209 [2021-11-23 03:17:33,508 INFO L226 Difference]: Without dead ends: 15184 [2021-11-23 03:17:33,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:33,508 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 96 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:33,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 81 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 03:17:33,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15184 states. [2021-11-23 03:17:34,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15184 to 14572. [2021-11-23 03:17:34,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14572 states, 14571 states have (on average 4.80509230663647) internal successors, (70015), 14571 states have internal predecessors, (70015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14572 states to 14572 states and 70015 transitions. [2021-11-23 03:17:34,129 INFO L78 Accepts]: Start accepts. Automaton has 14572 states and 70015 transitions. Word has length 25 [2021-11-23 03:17:34,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:34,129 INFO L470 AbstractCegarLoop]: Abstraction has 14572 states and 70015 transitions. [2021-11-23 03:17:34,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:34,129 INFO L276 IsEmpty]: Start isEmpty. Operand 14572 states and 70015 transitions. [2021-11-23 03:17:34,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:17:34,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:34,165 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:34,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:34,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:34,365 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:17:34,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:34,366 INFO L85 PathProgramCache]: Analyzing trace with hash 2052562152, now seen corresponding path program 79 times [2021-11-23 03:17:34,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:34,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469883226] [2021-11-23 03:17:34,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:34,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:34,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:34,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469883226] [2021-11-23 03:17:34,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469883226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:34,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41526882] [2021-11-23 03:17:34,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:17:34,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:34,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:34,602 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:34,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-23 03:17:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:34,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:17:34,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:35,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:17:35,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41526882] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:35,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1012563455] [2021-11-23 03:17:35,686 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:17:35,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:35,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2021-11-23 03:17:35,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867831307] [2021-11-23 03:17:35,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:35,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:17:35,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:35,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:17:35,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:35,689 INFO L87 Difference]: Start difference. First operand 14572 states and 70015 transitions. Second operand has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:37,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:37,827 INFO L93 Difference]: Finished difference Result 16036 states and 75354 transitions. [2021-11-23 03:17:37,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:17:37,827 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 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 25 [2021-11-23 03:17:37,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:37,896 INFO L225 Difference]: With dead ends: 16036 [2021-11-23 03:17:37,896 INFO L226 Difference]: Without dead ends: 15996 [2021-11-23 03:17:37,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:37,896 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 124 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:37,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 110 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 03:17:37,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15996 states. [2021-11-23 03:17:38,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15996 to 14932. [2021-11-23 03:17:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14932 states, 14931 states have (on average 4.811667001540419) internal successors, (71843), 14931 states have internal predecessors, (71843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14932 states to 14932 states and 71843 transitions. [2021-11-23 03:17:38,602 INFO L78 Accepts]: Start accepts. Automaton has 14932 states and 71843 transitions. Word has length 25 [2021-11-23 03:17:38,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:38,602 INFO L470 AbstractCegarLoop]: Abstraction has 14932 states and 71843 transitions. [2021-11-23 03:17:38,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:38,602 INFO L276 IsEmpty]: Start isEmpty. Operand 14932 states and 71843 transitions. [2021-11-23 03:17:38,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:17:38,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:38,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:38,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:38,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:38,846 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:17:38,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:38,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1486770840, now seen corresponding path program 80 times [2021-11-23 03:17:38,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:38,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540688724] [2021-11-23 03:17:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:38,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:39,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:39,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540688724] [2021-11-23 03:17:39,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540688724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:39,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425661412] [2021-11-23 03:17:39,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:17:39,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:39,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:39,105 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:39,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-23 03:17:39,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:17:39,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:17:39,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:17:39,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:39,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:40,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425661412] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:40,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [39165687] [2021-11-23 03:17:40,032 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:17:40,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:40,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:17:40,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672821653] [2021-11-23 03:17:40,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:40,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:17:40,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:40,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:17:40,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:40,035 INFO L87 Difference]: Start difference. First operand 14932 states and 71843 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:41,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:41,657 INFO L93 Difference]: Finished difference Result 15494 states and 73691 transitions. [2021-11-23 03:17:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:17:41,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:17:41,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:41,735 INFO L225 Difference]: With dead ends: 15494 [2021-11-23 03:17:41,735 INFO L226 Difference]: Without dead ends: 15480 [2021-11-23 03:17:41,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:17:41,735 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 99 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:41,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 88 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 03:17:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15480 states. [2021-11-23 03:17:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15480 to 15042. [2021-11-23 03:17:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15042 states, 15041 states have (on average 4.810517917691643) internal successors, (72355), 15041 states have internal predecessors, (72355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15042 states to 15042 states and 72355 transitions. [2021-11-23 03:17:42,384 INFO L78 Accepts]: Start accepts. Automaton has 15042 states and 72355 transitions. Word has length 25 [2021-11-23 03:17:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:42,384 INFO L470 AbstractCegarLoop]: Abstraction has 15042 states and 72355 transitions. [2021-11-23 03:17:42,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 15042 states and 72355 transitions. [2021-11-23 03:17:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:17:42,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:42,592 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:42,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:42,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:42,793 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:17:42,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:42,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1852465432, now seen corresponding path program 81 times [2021-11-23 03:17:42,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:42,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878938405] [2021-11-23 03:17:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:42,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:42,998 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:42,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878938405] [2021-11-23 03:17:42,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878938405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:42,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481372745] [2021-11-23 03:17:42,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:17:42,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:42,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:43,000 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:43,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-23 03:17:43,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:17:43,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:17:43,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:17:43,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:43,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:17:43,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481372745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:43,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2114396046] [2021-11-23 03:17:43,995 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:17:43,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:43,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2021-11-23 03:17:43,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966098566] [2021-11-23 03:17:43,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:43,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:17:43,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:43,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:17:43,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:17:43,999 INFO L87 Difference]: Start difference. First operand 15042 states and 72355 transitions. Second operand has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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) [2021-11-23 03:17:45,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:45,013 INFO L93 Difference]: Finished difference Result 15648 states and 74626 transitions. [2021-11-23 03:17:45,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 03:17:45,013 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 25 [2021-11-23 03:17:45,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:45,101 INFO L225 Difference]: With dead ends: 15648 [2021-11-23 03:17:45,102 INFO L226 Difference]: Without dead ends: 15624 [2021-11-23 03:17:45,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:17:45,103 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 87 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:45,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 93 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 634 Invalid, 0 Unknown, 219 Unchecked, 0.9s Time] [2021-11-23 03:17:45,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15624 states. [2021-11-23 03:17:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15624 to 15280. [2021-11-23 03:17:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15280 states, 15279 states have (on average 4.809411610707507) internal successors, (73483), 15279 states have internal predecessors, (73483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:45,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15280 states to 15280 states and 73483 transitions. [2021-11-23 03:17:45,783 INFO L78 Accepts]: Start accepts. Automaton has 15280 states and 73483 transitions. Word has length 25 [2021-11-23 03:17:45,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:45,784 INFO L470 AbstractCegarLoop]: Abstraction has 15280 states and 73483 transitions. [2021-11-23 03:17:45,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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) [2021-11-23 03:17:45,784 INFO L276 IsEmpty]: Start isEmpty. Operand 15280 states and 73483 transitions. [2021-11-23 03:17:45,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:17:45,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:45,826 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:45,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:46,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-11-23 03:17:46,027 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:17:46,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:46,027 INFO L85 PathProgramCache]: Analyzing trace with hash -107181396, now seen corresponding path program 82 times [2021-11-23 03:17:46,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:46,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371595181] [2021-11-23 03:17:46,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:46,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:46,283 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:46,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371595181] [2021-11-23 03:17:46,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371595181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:46,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89402846] [2021-11-23 03:17:46,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:17:46,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:46,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:46,284 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:46,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-23 03:17:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:46,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:17:46,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:46,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:17:47,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89402846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:47,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1471352946] [2021-11-23 03:17:47,154 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:17:47,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:47,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2021-11-23 03:17:47,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134962548] [2021-11-23 03:17:47,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:47,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:17:47,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:47,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:17:47,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:17:47,155 INFO L87 Difference]: Start difference. First operand 15280 states and 73483 transitions. Second operand has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:48,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:48,470 INFO L93 Difference]: Finished difference Result 15949 states and 75752 transitions. [2021-11-23 03:17:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:17:48,471 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 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 25 [2021-11-23 03:17:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:48,576 INFO L225 Difference]: With dead ends: 15949 [2021-11-23 03:17:48,577 INFO L226 Difference]: Without dead ends: 15924 [2021-11-23 03:17:48,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:17:48,577 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 107 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:48,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 90 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 891 Invalid, 0 Unknown, 125 Unchecked, 1.0s Time] [2021-11-23 03:17:48,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15924 states. [2021-11-23 03:17:49,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15924 to 15446. [2021-11-23 03:17:49,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15446 states, 15445 states have (on average 4.810100356102298) internal successors, (74292), 15445 states have internal predecessors, (74292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:49,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15446 states to 15446 states and 74292 transitions. [2021-11-23 03:17:49,327 INFO L78 Accepts]: Start accepts. Automaton has 15446 states and 74292 transitions. Word has length 25 [2021-11-23 03:17:49,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:49,328 INFO L470 AbstractCegarLoop]: Abstraction has 15446 states and 74292 transitions. [2021-11-23 03:17:49,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:49,328 INFO L276 IsEmpty]: Start isEmpty. Operand 15446 states and 74292 transitions. [2021-11-23 03:17:49,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:17:49,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:49,369 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:49,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:49,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-11-23 03:17:49,570 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:17:49,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:49,570 INFO L85 PathProgramCache]: Analyzing trace with hash 460307944, now seen corresponding path program 83 times [2021-11-23 03:17:49,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:49,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439116485] [2021-11-23 03:17:49,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:49,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:49,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:49,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439116485] [2021-11-23 03:17:49,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439116485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:49,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608397399] [2021-11-23 03:17:49,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:17:49,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:49,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:49,756 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:49,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-23 03:17:49,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:17:49,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:17:49,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:17:49,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:50,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:17:50,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608397399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:50,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [492928933] [2021-11-23 03:17:50,607 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:17:50,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:50,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 15 [2021-11-23 03:17:50,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397063461] [2021-11-23 03:17:50,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:50,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:17:50,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:50,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:17:50,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:17:50,609 INFO L87 Difference]: Start difference. First operand 15446 states and 74292 transitions. Second operand has 17 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:51,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:51,752 INFO L93 Difference]: Finished difference Result 15991 states and 76195 transitions. [2021-11-23 03:17:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 03:17:51,753 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 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 25 [2021-11-23 03:17:51,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:51,814 INFO L225 Difference]: With dead ends: 15991 [2021-11-23 03:17:51,815 INFO L226 Difference]: Without dead ends: 15977 [2021-11-23 03:17:51,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:17:51,815 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 107 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:51,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 80 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 820 Invalid, 0 Unknown, 112 Unchecked, 1.0s Time] [2021-11-23 03:17:51,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15977 states. [2021-11-23 03:17:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15977 to 15609. [2021-11-23 03:17:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15609 states, 15608 states have (on average 4.814133777549975) internal successors, (75139), 15608 states have internal predecessors, (75139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15609 states to 15609 states and 75139 transitions. [2021-11-23 03:17:52,471 INFO L78 Accepts]: Start accepts. Automaton has 15609 states and 75139 transitions. Word has length 25 [2021-11-23 03:17:52,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:52,471 INFO L470 AbstractCegarLoop]: Abstraction has 15609 states and 75139 transitions. [2021-11-23 03:17:52,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:52,471 INFO L276 IsEmpty]: Start isEmpty. Operand 15609 states and 75139 transitions. [2021-11-23 03:17:52,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:17:52,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:52,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:52,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:52,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:52,713 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:17:52,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:52,714 INFO L85 PathProgramCache]: Analyzing trace with hash -952152848, now seen corresponding path program 84 times [2021-11-23 03:17:52,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:52,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267927188] [2021-11-23 03:17:52,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:52,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:52,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:52,947 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:52,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267927188] [2021-11-23 03:17:52,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267927188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:52,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064011115] [2021-11-23 03:17:52,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:17:52,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:52,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:52,952 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:52,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-23 03:17:53,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:17:53,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:17:53,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:17:53,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:53,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:17:53,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064011115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:53,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [187607601] [2021-11-23 03:17:53,803 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:17:53,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:53,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2021-11-23 03:17:53,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535095834] [2021-11-23 03:17:53,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:53,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:17:53,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:17:53,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:17:53,804 INFO L87 Difference]: Start difference. First operand 15609 states and 75139 transitions. Second operand has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:55,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:55,280 INFO L93 Difference]: Finished difference Result 16250 states and 77355 transitions. [2021-11-23 03:17:55,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:17:55,280 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 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 25 [2021-11-23 03:17:55,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:55,344 INFO L225 Difference]: With dead ends: 16250 [2021-11-23 03:17:55,344 INFO L226 Difference]: Without dead ends: 16229 [2021-11-23 03:17:55,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:17:55,344 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 109 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:55,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 103 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1045 Invalid, 0 Unknown, 139 Unchecked, 1.2s Time] [2021-11-23 03:17:55,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16229 states. [2021-11-23 03:17:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16229 to 15833. [2021-11-23 03:17:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15833 states, 15832 states have (on average 4.812468418393128) internal successors, (76191), 15832 states have internal predecessors, (76191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:56,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15833 states to 15833 states and 76191 transitions. [2021-11-23 03:17:56,055 INFO L78 Accepts]: Start accepts. Automaton has 15833 states and 76191 transitions. Word has length 25 [2021-11-23 03:17:56,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:56,055 INFO L470 AbstractCegarLoop]: Abstraction has 15833 states and 76191 transitions. [2021-11-23 03:17:56,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:56,055 INFO L276 IsEmpty]: Start isEmpty. Operand 15833 states and 76191 transitions. [2021-11-23 03:17:56,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:17:56,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:56,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:56,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-11-23 03:17:56,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:56,301 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:17:56,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:17:56,302 INFO L85 PathProgramCache]: Analyzing trace with hash -384663508, now seen corresponding path program 85 times [2021-11-23 03:17:56,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:17:56,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571034722] [2021-11-23 03:17:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:17:56,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:17:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:56,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:17:56,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571034722] [2021-11-23 03:17:56,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571034722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:17:56,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133721737] [2021-11-23 03:17:56,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:17:56,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:17:56,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:17:56,482 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:17:56,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-23 03:17:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:17:56,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:17:56,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:17:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:17:56,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:17:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:17:57,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133721737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:17:57,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [509628860] [2021-11-23 03:17:57,411 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:17:57,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:17:57,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 15 [2021-11-23 03:17:57,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519959669] [2021-11-23 03:17:57,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:17:57,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:17:57,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:17:57,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:17:57,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:17:57,413 INFO L87 Difference]: Start difference. First operand 15833 states and 76191 transitions. Second operand has 17 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:58,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:17:58,776 INFO L93 Difference]: Finished difference Result 16752 states and 79578 transitions. [2021-11-23 03:17:58,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 03:17:58,777 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 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 25 [2021-11-23 03:17:58,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:17:58,847 INFO L225 Difference]: With dead ends: 16752 [2021-11-23 03:17:58,847 INFO L226 Difference]: Without dead ends: 16692 [2021-11-23 03:17:58,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:17:58,847 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 111 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:17:58,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 82 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 877 Invalid, 0 Unknown, 95 Unchecked, 1.2s Time] [2021-11-23 03:17:58,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16692 states. [2021-11-23 03:17:59,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16692 to 16128. [2021-11-23 03:17:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16128 states, 16127 states have (on average 4.818069076703664) internal successors, (77701), 16127 states have internal predecessors, (77701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:59,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16128 states to 16128 states and 77701 transitions. [2021-11-23 03:17:59,784 INFO L78 Accepts]: Start accepts. Automaton has 16128 states and 77701 transitions. Word has length 25 [2021-11-23 03:17:59,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:17:59,785 INFO L470 AbstractCegarLoop]: Abstraction has 16128 states and 77701 transitions. [2021-11-23 03:17:59,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:17:59,785 INFO L276 IsEmpty]: Start isEmpty. Operand 16128 states and 77701 transitions. [2021-11-23 03:17:59,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:17:59,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:17:59,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:17:59,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-11-23 03:18:00,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-11-23 03:18:00,043 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:18:00,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:00,044 INFO L85 PathProgramCache]: Analyzing trace with hash -911587480, now seen corresponding path program 86 times [2021-11-23 03:18:00,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:00,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814836658] [2021-11-23 03:18:00,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:00,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:00,301 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:00,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814836658] [2021-11-23 03:18:00,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814836658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:00,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132836538] [2021-11-23 03:18:00,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:18:00,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:00,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:00,308 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:00,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-23 03:18:00,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:18:00,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:18:00,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:18:00,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:01,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:03,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132836538] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:03,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [312907140] [2021-11-23 03:18:03,588 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:18:03,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:03,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-11-23 03:18:03,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642940196] [2021-11-23 03:18:03,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:03,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:18:03,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:03,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:18:03,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=289, Unknown=1, NotChecked=0, Total=342 [2021-11-23 03:18:03,591 INFO L87 Difference]: Start difference. First operand 16128 states and 77701 transitions. Second operand has 19 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:04,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:04,736 INFO L93 Difference]: Finished difference Result 16741 states and 79875 transitions. [2021-11-23 03:18:04,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 03:18:04,737 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 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 25 [2021-11-23 03:18:04,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:04,798 INFO L225 Difference]: With dead ends: 16741 [2021-11-23 03:18:04,799 INFO L226 Difference]: Without dead ends: 16721 [2021-11-23 03:18:04,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=52, Invalid=289, Unknown=1, NotChecked=0, Total=342 [2021-11-23 03:18:04,799 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 128 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:04,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 126 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 893 Invalid, 0 Unknown, 306 Unchecked, 1.0s Time] [2021-11-23 03:18:04,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16721 states. [2021-11-23 03:18:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16721 to 16407. [2021-11-23 03:18:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16407 states, 16406 states have (on average 4.808911373887602) internal successors, (78895), 16406 states have internal predecessors, (78895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:05,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16407 states to 16407 states and 78895 transitions. [2021-11-23 03:18:05,416 INFO L78 Accepts]: Start accepts. Automaton has 16407 states and 78895 transitions. Word has length 25 [2021-11-23 03:18:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:05,416 INFO L470 AbstractCegarLoop]: Abstraction has 16407 states and 78895 transitions. [2021-11-23 03:18:05,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 16407 states and 78895 transitions. [2021-11-23 03:18:05,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:18:05,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:05,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:05,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-11-23 03:18:05,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-11-23 03:18:05,657 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:18:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:05,657 INFO L85 PathProgramCache]: Analyzing trace with hash -118173558, now seen corresponding path program 87 times [2021-11-23 03:18:05,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:05,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484103551] [2021-11-23 03:18:05,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:05,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:05,849 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:05,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484103551] [2021-11-23 03:18:05,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484103551] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:05,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264243154] [2021-11-23 03:18:05,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:18:05,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:05,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:05,851 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:05,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-23 03:18:05,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:18:05,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:18:05,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:18:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:06,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:18:06,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264243154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:06,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1285824725] [2021-11-23 03:18:06,556 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:18:06,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:06,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:18:06,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528558367] [2021-11-23 03:18:06,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:06,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:18:06,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:06,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:18:06,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:06,558 INFO L87 Difference]: Start difference. First operand 16407 states and 78895 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:07,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:07,751 INFO L93 Difference]: Finished difference Result 16781 states and 80052 transitions. [2021-11-23 03:18:07,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:18:07,752 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:18:07,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:07,813 INFO L225 Difference]: With dead ends: 16781 [2021-11-23 03:18:07,813 INFO L226 Difference]: Without dead ends: 16767 [2021-11-23 03:18:07,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:07,813 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 92 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:07,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 71 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:18:07,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16767 states. [2021-11-23 03:18:08,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16767 to 16465. [2021-11-23 03:18:08,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16465 states, 16464 states have (on average 4.808673469387755) internal successors, (79170), 16464 states have internal predecessors, (79170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16465 states to 16465 states and 79170 transitions. [2021-11-23 03:18:08,298 INFO L78 Accepts]: Start accepts. Automaton has 16465 states and 79170 transitions. Word has length 25 [2021-11-23 03:18:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:08,298 INFO L470 AbstractCegarLoop]: Abstraction has 16465 states and 79170 transitions. [2021-11-23 03:18:08,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:08,298 INFO L276 IsEmpty]: Start isEmpty. Operand 16465 states and 79170 transitions. [2021-11-23 03:18:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:18:08,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:08,504 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:08,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-11-23 03:18:08,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-11-23 03:18:08,705 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:18:08,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:08,706 INFO L85 PathProgramCache]: Analyzing trace with hash -624519824, now seen corresponding path program 88 times [2021-11-23 03:18:08,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:08,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094127634] [2021-11-23 03:18:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:08,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:08,904 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:08,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094127634] [2021-11-23 03:18:08,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094127634] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:08,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175315435] [2021-11-23 03:18:08,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:18:08,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:08,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:08,908 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:08,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-23 03:18:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:09,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:18:09,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:09,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:18:09,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175315435] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:09,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [994789445] [2021-11-23 03:18:09,713 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:18:09,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:09,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:18:09,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116072970] [2021-11-23 03:18:09,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:09,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:18:09,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:09,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:18:09,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:09,714 INFO L87 Difference]: Start difference. First operand 16465 states and 79170 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:10,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:10,536 INFO L93 Difference]: Finished difference Result 16922 states and 80582 transitions. [2021-11-23 03:18:10,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:18:10,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:18:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:10,600 INFO L225 Difference]: With dead ends: 16922 [2021-11-23 03:18:10,600 INFO L226 Difference]: Without dead ends: 16887 [2021-11-23 03:18:10,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:10,601 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 86 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:10,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 64 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:18:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16887 states. [2021-11-23 03:18:11,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16887 to 16531. [2021-11-23 03:18:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16531 states, 16530 states have (on average 4.8098608590441625) internal successors, (79507), 16530 states have internal predecessors, (79507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:11,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16531 states to 16531 states and 79507 transitions. [2021-11-23 03:18:11,229 INFO L78 Accepts]: Start accepts. Automaton has 16531 states and 79507 transitions. Word has length 25 [2021-11-23 03:18:11,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:11,230 INFO L470 AbstractCegarLoop]: Abstraction has 16531 states and 79507 transitions. [2021-11-23 03:18:11,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:11,230 INFO L276 IsEmpty]: Start isEmpty. Operand 16531 states and 79507 transitions. [2021-11-23 03:18:11,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:18:11,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:11,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:11,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-11-23 03:18:11,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:11,472 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:18:11,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:11,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1598173578, now seen corresponding path program 89 times [2021-11-23 03:18:11,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:11,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588469614] [2021-11-23 03:18:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:11,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:11,697 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:11,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588469614] [2021-11-23 03:18:11,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588469614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:11,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899304198] [2021-11-23 03:18:11,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:18:11,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:11,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:11,699 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:11,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-23 03:18:11,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:18:11,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:18:11,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:18:11,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:12,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:18:12,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899304198] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:12,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [934601853] [2021-11-23 03:18:12,539 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:18:12,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:12,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 18 [2021-11-23 03:18:12,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98267783] [2021-11-23 03:18:12,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:12,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 03:18:12,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:12,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 03:18:12,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:18:12,541 INFO L87 Difference]: Start difference. First operand 16531 states and 79507 transitions. Second operand has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:14,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:14,517 INFO L93 Difference]: Finished difference Result 17857 states and 84488 transitions. [2021-11-23 03:18:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:18:14,518 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:18:14,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:14,586 INFO L225 Difference]: With dead ends: 17857 [2021-11-23 03:18:14,586 INFO L226 Difference]: Without dead ends: 17836 [2021-11-23 03:18:14,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:18:14,587 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:14,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 143 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1439 Invalid, 0 Unknown, 104 Unchecked, 1.7s Time] [2021-11-23 03:18:14,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17836 states. [2021-11-23 03:18:15,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17836 to 16976. [2021-11-23 03:18:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16976 states, 16975 states have (on average 4.811487481590574) internal successors, (81675), 16975 states have internal predecessors, (81675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16976 states to 16976 states and 81675 transitions. [2021-11-23 03:18:15,416 INFO L78 Accepts]: Start accepts. Automaton has 16976 states and 81675 transitions. Word has length 25 [2021-11-23 03:18:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:15,416 INFO L470 AbstractCegarLoop]: Abstraction has 16976 states and 81675 transitions. [2021-11-23 03:18:15,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 16976 states and 81675 transitions. [2021-11-23 03:18:15,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:18:15,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:15,462 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:15,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-11-23 03:18:15,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-11-23 03:18:15,662 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:18:15,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:15,663 INFO L85 PathProgramCache]: Analyzing trace with hash 390308358, now seen corresponding path program 90 times [2021-11-23 03:18:15,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:15,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213945645] [2021-11-23 03:18:15,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:15,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:15,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:15,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213945645] [2021-11-23 03:18:15,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213945645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:15,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118623283] [2021-11-23 03:18:15,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:18:15,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:15,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:15,859 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:15,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-23 03:18:16,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:18:16,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:18:16,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:18:16,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:16,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:18:16,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118623283] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:16,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1936228193] [2021-11-23 03:18:16,753 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:18:16,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:16,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:18:16,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882092031] [2021-11-23 03:18:16,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:16,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:18:16,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:16,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:18:16,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:16,755 INFO L87 Difference]: Start difference. First operand 16976 states and 81675 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:18,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:18,440 INFO L93 Difference]: Finished difference Result 18141 states and 85542 transitions. [2021-11-23 03:18:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:18:18,440 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:18:18,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:18,515 INFO L225 Difference]: With dead ends: 18141 [2021-11-23 03:18:18,515 INFO L226 Difference]: Without dead ends: 18046 [2021-11-23 03:18:18,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:18,516 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 129 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:18,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 86 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 03:18:18,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18046 states. [2021-11-23 03:18:19,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18046 to 17164. [2021-11-23 03:18:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17164 states, 17163 states have (on average 4.808133776146361) internal successors, (82522), 17163 states have internal predecessors, (82522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17164 states to 17164 states and 82522 transitions. [2021-11-23 03:18:19,338 INFO L78 Accepts]: Start accepts. Automaton has 17164 states and 82522 transitions. Word has length 25 [2021-11-23 03:18:19,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:19,338 INFO L470 AbstractCegarLoop]: Abstraction has 17164 states and 82522 transitions. [2021-11-23 03:18:19,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:19,338 INFO L276 IsEmpty]: Start isEmpty. Operand 17164 states and 82522 transitions. [2021-11-23 03:18:19,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:18:19,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:19,383 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:19,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-11-23 03:18:19,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-11-23 03:18:19,583 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:18:19,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:19,584 INFO L85 PathProgramCache]: Analyzing trace with hash 279704202, now seen corresponding path program 91 times [2021-11-23 03:18:19,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:19,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872007932] [2021-11-23 03:18:19,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:19,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:19,764 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:19,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872007932] [2021-11-23 03:18:19,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872007932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:19,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115913003] [2021-11-23 03:18:19,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:18:19,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:19,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:19,765 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:19,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-23 03:18:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:19,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:18:19,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:20,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:18:20,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115913003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:20,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [376160140] [2021-11-23 03:18:20,781 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:18:20,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:20,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:18:20,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718016385] [2021-11-23 03:18:20,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:20,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:18:20,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:20,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:18:20,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:20,783 INFO L87 Difference]: Start difference. First operand 17164 states and 82522 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:22,284 INFO L93 Difference]: Finished difference Result 18023 states and 85429 transitions. [2021-11-23 03:18:22,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:18:22,284 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:18:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:22,361 INFO L225 Difference]: With dead ends: 18023 [2021-11-23 03:18:22,361 INFO L226 Difference]: Without dead ends: 18002 [2021-11-23 03:18:22,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:22,361 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 141 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:22,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 86 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 03:18:22,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18002 states. [2021-11-23 03:18:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18002 to 17312. [2021-11-23 03:18:23,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17312 states, 17311 states have (on average 4.8131246028536765) internal successors, (83320), 17311 states have internal predecessors, (83320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17312 states to 17312 states and 83320 transitions. [2021-11-23 03:18:23,112 INFO L78 Accepts]: Start accepts. Automaton has 17312 states and 83320 transitions. Word has length 25 [2021-11-23 03:18:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:23,112 INFO L470 AbstractCegarLoop]: Abstraction has 17312 states and 83320 transitions. [2021-11-23 03:18:23,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 17312 states and 83320 transitions. [2021-11-23 03:18:23,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:18:23,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:23,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:23,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-11-23 03:18:23,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-11-23 03:18:23,358 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:18:23,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:23,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1588619702, now seen corresponding path program 92 times [2021-11-23 03:18:23,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:23,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730740566] [2021-11-23 03:18:23,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:23,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:23,563 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:23,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730740566] [2021-11-23 03:18:23,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730740566] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:23,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047938920] [2021-11-23 03:18:23,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:18:23,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:23,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:23,564 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:23,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-23 03:18:23,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:18:23,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:18:23,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:18:23,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:23,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:18:24,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047938920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:24,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [473427427] [2021-11-23 03:18:24,308 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:18:24,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:24,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:18:24,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76779959] [2021-11-23 03:18:24,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:24,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:18:24,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:24,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:18:24,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:24,310 INFO L87 Difference]: Start difference. First operand 17312 states and 83320 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:25,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:25,552 INFO L93 Difference]: Finished difference Result 17717 states and 84580 transitions. [2021-11-23 03:18:25,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:18:25,553 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:18:25,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:25,805 INFO L225 Difference]: With dead ends: 17717 [2021-11-23 03:18:25,805 INFO L226 Difference]: Without dead ends: 17682 [2021-11-23 03:18:25,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:25,806 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 60 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:25,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 98 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:18:25,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17682 states. [2021-11-23 03:18:26,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17682 to 17354. [2021-11-23 03:18:26,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17354 states, 17353 states have (on average 4.816458249294071) internal successors, (83580), 17353 states have internal predecessors, (83580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17354 states to 17354 states and 83580 transitions. [2021-11-23 03:18:26,353 INFO L78 Accepts]: Start accepts. Automaton has 17354 states and 83580 transitions. Word has length 25 [2021-11-23 03:18:26,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:26,354 INFO L470 AbstractCegarLoop]: Abstraction has 17354 states and 83580 transitions. [2021-11-23 03:18:26,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 17354 states and 83580 transitions. [2021-11-23 03:18:26,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:18:26,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:26,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:26,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-11-23 03:18:26,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-11-23 03:18:26,600 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:18:26,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:26,601 INFO L85 PathProgramCache]: Analyzing trace with hash -144607034, now seen corresponding path program 93 times [2021-11-23 03:18:26,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:26,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813356991] [2021-11-23 03:18:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:26,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:27,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:27,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813356991] [2021-11-23 03:18:27,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813356991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:27,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230766204] [2021-11-23 03:18:27,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:18:27,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:27,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:27,006 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:27,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-23 03:18:27,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:18:27,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:18:27,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:18:27,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:27,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:18:27,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230766204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:27,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [130289011] [2021-11-23 03:18:27,779 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:18:27,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:27,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:18:27,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007484328] [2021-11-23 03:18:27,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:27,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:18:27,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:27,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:18:27,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:27,780 INFO L87 Difference]: Start difference. First operand 17354 states and 83580 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:29,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:29,019 INFO L93 Difference]: Finished difference Result 18681 states and 88249 transitions. [2021-11-23 03:18:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:18:29,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:18:29,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:29,092 INFO L225 Difference]: With dead ends: 18681 [2021-11-23 03:18:29,092 INFO L226 Difference]: Without dead ends: 18634 [2021-11-23 03:18:29,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:29,093 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 141 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:29,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 80 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:18:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18634 states. [2021-11-23 03:18:29,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18634 to 17456. [2021-11-23 03:18:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17456 states, 17455 states have (on average 4.832368948725294) internal successors, (84349), 17455 states have internal predecessors, (84349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17456 states to 17456 states and 84349 transitions. [2021-11-23 03:18:29,801 INFO L78 Accepts]: Start accepts. Automaton has 17456 states and 84349 transitions. Word has length 25 [2021-11-23 03:18:29,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:29,801 INFO L470 AbstractCegarLoop]: Abstraction has 17456 states and 84349 transitions. [2021-11-23 03:18:29,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:29,801 INFO L276 IsEmpty]: Start isEmpty. Operand 17456 states and 84349 transitions. [2021-11-23 03:18:29,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:18:29,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:29,846 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:29,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-11-23 03:18:30,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-11-23 03:18:30,046 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:18:30,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:30,047 INFO L85 PathProgramCache]: Analyzing trace with hash -799717784, now seen corresponding path program 94 times [2021-11-23 03:18:30,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:30,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683981771] [2021-11-23 03:18:30,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:30,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:30,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:30,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683981771] [2021-11-23 03:18:30,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683981771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:30,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168547769] [2021-11-23 03:18:30,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:18:30,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:30,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:30,267 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:30,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-23 03:18:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:30,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:18:30,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:30,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:18:31,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168547769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:31,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [950470983] [2021-11-23 03:18:31,019 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:18:31,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:31,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:18:31,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993296901] [2021-11-23 03:18:31,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:31,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:18:31,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:31,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:18:31,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:31,021 INFO L87 Difference]: Start difference. First operand 17456 states and 84349 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:32,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:32,424 INFO L93 Difference]: Finished difference Result 18036 states and 86277 transitions. [2021-11-23 03:18:32,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:18:32,425 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:18:32,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:32,500 INFO L225 Difference]: With dead ends: 18036 [2021-11-23 03:18:32,500 INFO L226 Difference]: Without dead ends: 18018 [2021-11-23 03:18:32,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:32,501 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 116 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:32,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 64 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 03:18:32,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18018 states. [2021-11-23 03:18:32,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18018 to 17602. [2021-11-23 03:18:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17602 states, 17601 states have (on average 4.831770922106698) internal successors, (85044), 17601 states have internal predecessors, (85044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:33,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17602 states to 17602 states and 85044 transitions. [2021-11-23 03:18:33,075 INFO L78 Accepts]: Start accepts. Automaton has 17602 states and 85044 transitions. Word has length 25 [2021-11-23 03:18:33,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:33,076 INFO L470 AbstractCegarLoop]: Abstraction has 17602 states and 85044 transitions. [2021-11-23 03:18:33,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:33,076 INFO L276 IsEmpty]: Start isEmpty. Operand 17602 states and 85044 transitions. [2021-11-23 03:18:33,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:18:33,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:33,305 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:33,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-11-23 03:18:33,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:33,505 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:18:33,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:33,506 INFO L85 PathProgramCache]: Analyzing trace with hash 811223174, now seen corresponding path program 95 times [2021-11-23 03:18:33,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:33,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903458117] [2021-11-23 03:18:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:33,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:33,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:33,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:33,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903458117] [2021-11-23 03:18:33,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903458117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:33,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572825382] [2021-11-23 03:18:33,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:18:33,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:33,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:33,738 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:33,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-11-23 03:18:33,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:18:33,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:18:33,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:18:34,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:34,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:18:34,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572825382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:34,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [362244915] [2021-11-23 03:18:34,976 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:18:34,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:34,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2021-11-23 03:18:34,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320651386] [2021-11-23 03:18:34,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:34,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:18:34,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:34,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:18:34,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:18:34,978 INFO L87 Difference]: Start difference. First operand 17602 states and 85044 transitions. Second operand has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:36,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:36,520 INFO L93 Difference]: Finished difference Result 18610 states and 88520 transitions. [2021-11-23 03:18:36,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 03:18:36,521 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 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 25 [2021-11-23 03:18:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:36,602 INFO L225 Difference]: With dead ends: 18610 [2021-11-23 03:18:36,602 INFO L226 Difference]: Without dead ends: 18562 [2021-11-23 03:18:36,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:18:36,602 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 137 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:36,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 81 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 03:18:36,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18562 states. [2021-11-23 03:18:37,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18562 to 17870. [2021-11-23 03:18:37,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17870 states, 17869 states have (on average 4.828753707538195) internal successors, (86285), 17869 states have internal predecessors, (86285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17870 states to 17870 states and 86285 transitions. [2021-11-23 03:18:37,449 INFO L78 Accepts]: Start accepts. Automaton has 17870 states and 86285 transitions. Word has length 25 [2021-11-23 03:18:37,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:37,450 INFO L470 AbstractCegarLoop]: Abstraction has 17870 states and 86285 transitions. [2021-11-23 03:18:37,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:37,450 INFO L276 IsEmpty]: Start isEmpty. Operand 17870 states and 86285 transitions. [2021-11-23 03:18:37,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:18:37,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:37,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:37,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-11-23 03:18:37,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-11-23 03:18:37,703 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:18:37,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:37,704 INFO L85 PathProgramCache]: Analyzing trace with hash 700619018, now seen corresponding path program 96 times [2021-11-23 03:18:37,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:37,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100398117] [2021-11-23 03:18:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:37,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:37,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:37,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100398117] [2021-11-23 03:18:37,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100398117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:37,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184380792] [2021-11-23 03:18:37,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:18:37,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:37,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:37,863 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:37,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-11-23 03:18:38,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:18:38,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:18:38,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:18:38,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:38,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:18:38,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184380792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:38,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [288788179] [2021-11-23 03:18:38,700 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:18:38,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:38,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2021-11-23 03:18:38,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954788677] [2021-11-23 03:18:38,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:38,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:18:38,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:38,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:18:38,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:38,701 INFO L87 Difference]: Start difference. First operand 17870 states and 86285 transitions. Second operand has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:40,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:40,807 INFO L93 Difference]: Finished difference Result 19224 states and 91183 transitions. [2021-11-23 03:18:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:18:40,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 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 25 [2021-11-23 03:18:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:40,890 INFO L225 Difference]: With dead ends: 19224 [2021-11-23 03:18:40,890 INFO L226 Difference]: Without dead ends: 19202 [2021-11-23 03:18:40,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:40,890 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 111 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:40,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 135 Invalid, 1817 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [8 Valid, 1646 Invalid, 0 Unknown, 163 Unchecked, 1.8s Time] [2021-11-23 03:18:40,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19202 states. [2021-11-23 03:18:41,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19202 to 18090. [2021-11-23 03:18:41,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18090 states, 18089 states have (on average 4.8366963347890986) internal successors, (87491), 18089 states have internal predecessors, (87491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:41,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18090 states to 18090 states and 87491 transitions. [2021-11-23 03:18:41,736 INFO L78 Accepts]: Start accepts. Automaton has 18090 states and 87491 transitions. Word has length 25 [2021-11-23 03:18:41,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:41,737 INFO L470 AbstractCegarLoop]: Abstraction has 18090 states and 87491 transitions. [2021-11-23 03:18:41,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:41,737 INFO L276 IsEmpty]: Start isEmpty. Operand 18090 states and 87491 transitions. [2021-11-23 03:18:41,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:18:41,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:41,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:41,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-11-23 03:18:41,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:41,984 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:18:41,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:41,984 INFO L85 PathProgramCache]: Analyzing trace with hash 155744304, now seen corresponding path program 97 times [2021-11-23 03:18:41,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:41,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333578901] [2021-11-23 03:18:41,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:41,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:42,211 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:42,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333578901] [2021-11-23 03:18:42,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333578901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:42,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958408601] [2021-11-23 03:18:42,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:18:42,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:42,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:42,213 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:42,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-11-23 03:18:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:42,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:18:42,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:42,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:18:43,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958408601] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:43,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1086449608] [2021-11-23 03:18:43,299 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:18:43,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:43,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 18 [2021-11-23 03:18:43,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107328030] [2021-11-23 03:18:43,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:43,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 03:18:43,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:43,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 03:18:43,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:18:43,300 INFO L87 Difference]: Start difference. First operand 18090 states and 87491 transitions. Second operand has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:45,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:45,027 INFO L93 Difference]: Finished difference Result 19396 states and 92300 transitions. [2021-11-23 03:18:45,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:18:45,028 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:18:45,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:45,106 INFO L225 Difference]: With dead ends: 19396 [2021-11-23 03:18:45,106 INFO L226 Difference]: Without dead ends: 19355 [2021-11-23 03:18:45,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:18:45,106 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:45,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 126 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1419 Invalid, 0 Unknown, 83 Unchecked, 1.6s Time] [2021-11-23 03:18:45,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19355 states. [2021-11-23 03:18:45,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19355 to 18455. [2021-11-23 03:18:45,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18455 states, 18454 states have (on average 4.84502004985369) internal successors, (89410), 18454 states have internal predecessors, (89410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:45,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18455 states to 18455 states and 89410 transitions. [2021-11-23 03:18:45,882 INFO L78 Accepts]: Start accepts. Automaton has 18455 states and 89410 transitions. Word has length 25 [2021-11-23 03:18:45,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:45,882 INFO L470 AbstractCegarLoop]: Abstraction has 18455 states and 89410 transitions. [2021-11-23 03:18:45,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:45,882 INFO L276 IsEmpty]: Start isEmpty. Operand 18455 states and 89410 transitions. [2021-11-23 03:18:46,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:18:46,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:46,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:46,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-11-23 03:18:46,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:46,335 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:18:46,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:46,336 INFO L85 PathProgramCache]: Analyzing trace with hash 196309672, now seen corresponding path program 98 times [2021-11-23 03:18:46,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:46,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915596108] [2021-11-23 03:18:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:46,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:46,562 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:46,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915596108] [2021-11-23 03:18:46,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915596108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:46,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244240487] [2021-11-23 03:18:46,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:18:46,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:46,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:46,565 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:46,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-11-23 03:18:46,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:18:46,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:18:46,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:18:46,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:47,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:47,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244240487] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:47,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1483416793] [2021-11-23 03:18:47,480 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:18:47,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:47,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:18:47,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531275367] [2021-11-23 03:18:47,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:47,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:18:47,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:47,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:18:47,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:47,482 INFO L87 Difference]: Start difference. First operand 18455 states and 89410 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:48,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:48,910 INFO L93 Difference]: Finished difference Result 19135 states and 91685 transitions. [2021-11-23 03:18:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:18:48,910 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:18:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:48,973 INFO L225 Difference]: With dead ends: 19135 [2021-11-23 03:18:48,973 INFO L226 Difference]: Without dead ends: 19119 [2021-11-23 03:18:48,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:48,974 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 86 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:48,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 83 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 03:18:48,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19119 states. [2021-11-23 03:18:49,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19119 to 18572. [2021-11-23 03:18:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18572 states, 18571 states have (on average 4.847934952345054) internal successors, (90031), 18571 states have internal predecessors, (90031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18572 states to 18572 states and 90031 transitions. [2021-11-23 03:18:49,704 INFO L78 Accepts]: Start accepts. Automaton has 18572 states and 90031 transitions. Word has length 25 [2021-11-23 03:18:49,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:49,704 INFO L470 AbstractCegarLoop]: Abstraction has 18572 states and 90031 transitions. [2021-11-23 03:18:49,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:49,704 INFO L276 IsEmpty]: Start isEmpty. Operand 18572 states and 90031 transitions. [2021-11-23 03:18:49,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:18:49,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:49,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:49,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-11-23 03:18:49,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:49,949 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:18:49,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:49,950 INFO L85 PathProgramCache]: Analyzing trace with hash 944646222, now seen corresponding path program 99 times [2021-11-23 03:18:49,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:49,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171658428] [2021-11-23 03:18:49,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:49,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:50,181 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:50,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171658428] [2021-11-23 03:18:50,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171658428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:50,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040661652] [2021-11-23 03:18:50,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:18:50,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:50,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:50,183 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:50,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-11-23 03:18:50,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:18:50,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:18:50,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:18:50,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:50,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:51,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040661652] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:51,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [500998764] [2021-11-23 03:18:51,338 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:18:51,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:51,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:18:51,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703523851] [2021-11-23 03:18:51,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:51,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:18:51,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:51,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:18:51,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:51,340 INFO L87 Difference]: Start difference. First operand 18572 states and 90031 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:53,138 INFO L93 Difference]: Finished difference Result 19288 states and 92432 transitions. [2021-11-23 03:18:53,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:18:53,139 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:18:53,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:53,215 INFO L225 Difference]: With dead ends: 19288 [2021-11-23 03:18:53,215 INFO L226 Difference]: Without dead ends: 19266 [2021-11-23 03:18:53,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:18:53,216 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 93 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:53,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 81 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 03:18:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19266 states. [2021-11-23 03:18:53,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19266 to 18702. [2021-11-23 03:18:53,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18702 states, 18701 states have (on average 4.8527886209293625) internal successors, (90752), 18701 states have internal predecessors, (90752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18702 states to 18702 states and 90752 transitions. [2021-11-23 03:18:54,166 INFO L78 Accepts]: Start accepts. Automaton has 18702 states and 90752 transitions. Word has length 25 [2021-11-23 03:18:54,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:54,167 INFO L470 AbstractCegarLoop]: Abstraction has 18702 states and 90752 transitions. [2021-11-23 03:18:54,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:54,167 INFO L276 IsEmpty]: Start isEmpty. Operand 18702 states and 90752 transitions. [2021-11-23 03:18:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:18:54,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:54,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:54,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-11-23 03:18:54,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-11-23 03:18:54,430 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:18:54,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:54,431 INFO L85 PathProgramCache]: Analyzing trace with hash 699055088, now seen corresponding path program 100 times [2021-11-23 03:18:54,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:54,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125398915] [2021-11-23 03:18:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:54,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:54,642 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:54,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125398915] [2021-11-23 03:18:54,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125398915] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:54,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582056191] [2021-11-23 03:18:54,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:18:54,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:54,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:54,644 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:54,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-23 03:18:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:54,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:18:54,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:55,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:18:55,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582056191] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:55,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1071352257] [2021-11-23 03:18:55,728 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:18:55,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:18:55,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 18 [2021-11-23 03:18:55,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765348553] [2021-11-23 03:18:55,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:18:55,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 03:18:55,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:18:55,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 03:18:55,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:18:55,730 INFO L87 Difference]: Start difference. First operand 18702 states and 90752 transitions. Second operand has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:57,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:18:57,700 INFO L93 Difference]: Finished difference Result 19967 states and 95207 transitions. [2021-11-23 03:18:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:18:57,700 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:18:57,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:18:57,795 INFO L225 Difference]: With dead ends: 19967 [2021-11-23 03:18:57,795 INFO L226 Difference]: Without dead ends: 19940 [2021-11-23 03:18:57,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:18:57,799 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 107 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:18:57,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 140 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1507 Invalid, 0 Unknown, 264 Unchecked, 1.8s Time] [2021-11-23 03:18:57,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19940 states. [2021-11-23 03:18:58,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19940 to 18930. [2021-11-23 03:18:58,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18930 states, 18929 states have (on average 4.85604099529822) internal successors, (91920), 18929 states have internal predecessors, (91920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18930 states to 18930 states and 91920 transitions. [2021-11-23 03:18:58,752 INFO L78 Accepts]: Start accepts. Automaton has 18930 states and 91920 transitions. Word has length 25 [2021-11-23 03:18:58,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:18:58,752 INFO L470 AbstractCegarLoop]: Abstraction has 18930 states and 91920 transitions. [2021-11-23 03:18:58,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:18:58,752 INFO L276 IsEmpty]: Start isEmpty. Operand 18930 states and 91920 transitions. [2021-11-23 03:18:58,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:18:58,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:18:58,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:18:58,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-11-23 03:18:59,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-11-23 03:18:59,001 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:18:59,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:18:59,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1189200080, now seen corresponding path program 101 times [2021-11-23 03:18:59,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:18:59,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653649806] [2021-11-23 03:18:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:18:59,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:18:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:18:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:59,243 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:59,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653649806] [2021-11-23 03:18:59,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653649806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:18:59,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474263853] [2021-11-23 03:18:59,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:18:59,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:18:59,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:18:59,244 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:18:59,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-11-23 03:18:59,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:18:59,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:18:59,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:18:59,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:18:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:59,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:19:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:19:00,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474263853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:19:00,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [20583566] [2021-11-23 03:19:00,041 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:19:00,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:19:00,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:19:00,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726547203] [2021-11-23 03:19:00,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:19:00,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:19:00,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:19:00,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:19:00,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:19:00,042 INFO L87 Difference]: Start difference. First operand 18930 states and 91920 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:19:01,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:19:01,432 INFO L93 Difference]: Finished difference Result 19598 states and 94261 transitions. [2021-11-23 03:19:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:19:01,433 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:19:01,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:19:01,508 INFO L225 Difference]: With dead ends: 19598 [2021-11-23 03:19:01,508 INFO L226 Difference]: Without dead ends: 19584 [2021-11-23 03:19:01,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:19:01,508 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 95 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:19:01,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 83 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 03:19:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19584 states. [2021-11-23 03:19:02,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19584 to 19054. [2021-11-23 03:19:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19054 states, 19053 states have (on average 4.861596598960793) internal successors, (92628), 19053 states have internal predecessors, (92628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:19:02,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19054 states to 19054 states and 92628 transitions. [2021-11-23 03:19:02,303 INFO L78 Accepts]: Start accepts. Automaton has 19054 states and 92628 transitions. Word has length 25 [2021-11-23 03:19:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:19:02,304 INFO L470 AbstractCegarLoop]: Abstraction has 19054 states and 92628 transitions. [2021-11-23 03:19:02,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:19:02,304 INFO L276 IsEmpty]: Start isEmpty. Operand 19054 states and 92628 transitions. [2021-11-23 03:19:02,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:19:02,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:19:02,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:19:02,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-11-23 03:19:02,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-11-23 03:19:02,554 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:19:02,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:19:02,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1292790932, now seen corresponding path program 102 times [2021-11-23 03:19:02,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:19:02,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759954583] [2021-11-23 03:19:02,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:19:02,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:19:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:19:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:19:02,773 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:19:02,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759954583] [2021-11-23 03:19:02,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759954583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:19:02,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025780389] [2021-11-23 03:19:02,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:19:02,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:19:02,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:19:02,775 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:19:02,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-11-23 03:19:02,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:19:02,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:19:02,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:19:02,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:19:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:19:03,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:19:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:19:03,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025780389] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:19:03,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1820879118] [2021-11-23 03:19:03,535 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:19:03,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:19:03,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-11-23 03:19:03,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262798484] [2021-11-23 03:19:03,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:19:03,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:19:03,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:19:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:19:03,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:19:03,536 INFO L87 Difference]: Start difference. First operand 19054 states and 92628 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:19:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:19:04,527 INFO L93 Difference]: Finished difference Result 20066 states and 96499 transitions. [2021-11-23 03:19:04,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:19:04,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 25 [2021-11-23 03:19:04,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:19:04,605 INFO L225 Difference]: With dead ends: 20066 [2021-11-23 03:19:04,606 INFO L226 Difference]: Without dead ends: 20042 [2021-11-23 03:19:04,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:19:04,606 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 115 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:19:04,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 56 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:19:04,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20042 states. [2021-11-23 03:19:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20042 to 19402. [2021-11-23 03:19:05,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19402 states, 19401 states have (on average 4.868975825988351) internal successors, (94463), 19401 states have internal predecessors, (94463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:19:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19402 states to 19402 states and 94463 transitions. [2021-11-23 03:19:05,500 INFO L78 Accepts]: Start accepts. Automaton has 19402 states and 94463 transitions. Word has length 25 [2021-11-23 03:19:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:19:05,500 INFO L470 AbstractCegarLoop]: Abstraction has 19402 states and 94463 transitions. [2021-11-23 03:19:05,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:19:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand 19402 states and 94463 transitions. [2021-11-23 03:19:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:19:05,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:19:05,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:19:05,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-11-23 03:19:05,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-11-23 03:19:05,752 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-23 03:19:05,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:19:05,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1626724504, now seen corresponding path program 103 times [2021-11-23 03:19:05,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:19:05,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988138803] [2021-11-23 03:19:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:19:05,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:19:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:19:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:19:05,949 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:19:05,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988138803] [2021-11-23 03:19:05,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988138803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:19:05,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309782062] [2021-11-23 03:19:05,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:19:05,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:19:05,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:19:05,950 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:19:05,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c65c08-bb4f-43a5-b128-bc46f9aa5514/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-11-23 03:19:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:19:06,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:19:06,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:19:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:19:06,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:19:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:19:07,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309782062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:19:07,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [400779566] [2021-11-23 03:19:07,143 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:1603) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-23 03:19:07,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:19:07,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2021-11-23 03:19:07,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287819831] [2021-11-23 03:19:07,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:19:07,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:19:07,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:19:07,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:19:07,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:19:07,144 INFO L87 Difference]: Start difference. First operand 19402 states and 94463 transitions. Second operand has 19 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:19:08,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:19:08,566 INFO L93 Difference]: Finished difference Result 20308 states and 97710 transitions. [2021-11-23 03:19:08,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:19:08,567 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 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 25 [2021-11-23 03:19:08,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:19:08,660 INFO L225 Difference]: With dead ends: 20308 [2021-11-23 03:19:08,660 INFO L226 Difference]: Without dead ends: 20294 [2021-11-23 03:19:08,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:19:08,660 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 141 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:19:08,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 117 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1047 Invalid, 0 Unknown, 259 Unchecked, 1.2s Time] [2021-11-23 03:19:08,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20294 states.