./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta --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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:37:09,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:37:09,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:37:09,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:37:09,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:37:09,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:37:09,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:37:09,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:37:09,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:37:09,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:37:09,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:37:09,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:37:09,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:37:09,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:37:09,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:37:09,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:37:09,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:37:09,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:37:09,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:37:09,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:37:09,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:37:09,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:37:09,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:37:09,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:37:09,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:37:09,266 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:37:09,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:37:09,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:37:09,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:37:09,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:37:09,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:37:09,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:37:09,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:37:09,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:37:09,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:37:09,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:37:09,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:37:09,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:37:09,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:37:09,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:37:09,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:37:09,296 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:37:09,353 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:37:09,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:37:09,354 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:37:09,354 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:37:09,355 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:37:09,356 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:37:09,356 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:37:09,356 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:37:09,357 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:37:09,357 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:37:09,358 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:37:09,358 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:37:09,359 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:37:09,359 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:37:09,359 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:37:09,360 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:37:09,360 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:37:09,360 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:37:09,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:37:09,361 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:37:09,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:37:09,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:37:09,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:37:09,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:37:09,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:37:09,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:37:09,363 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:37:09,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:37:09,364 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:37:09,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:37:09,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:37:09,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:37:09,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:37:09,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:37:09,370 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:37:09,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:37:09,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:37:09,370 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:37:09,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:37:09,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:37:09,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:37:09,371 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 [2022-10-17 17:37:09,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:37:09,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:37:09,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:37:09,682 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:37:09,683 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:37:09,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-10-17 17:37:09,762 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/data/bbfaf2efe/c2ea6bf2b9544e45ae0a0b120fe39d90/FLAG8e6b3b174 [2022-10-17 17:37:10,277 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:37:10,278 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-10-17 17:37:10,286 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/data/bbfaf2efe/c2ea6bf2b9544e45ae0a0b120fe39d90/FLAG8e6b3b174 [2022-10-17 17:37:10,638 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/data/bbfaf2efe/c2ea6bf2b9544e45ae0a0b120fe39d90 [2022-10-17 17:37:10,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:37:10,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:37:10,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:37:10,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:37:10,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:37:10,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:10,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d737054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10, skipping insertion in model container [2022-10-17 17:37:10,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:10,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:37:10,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:37:10,903 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_80f61fcc-0fca-4740-a13c-169f2cbefa23/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-10-17 17:37:10,911 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:37:10,920 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:37:10,946 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_80f61fcc-0fca-4740-a13c-169f2cbefa23/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-10-17 17:37:10,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:37:10,965 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:37:10,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10 WrapperNode [2022-10-17 17:37:10,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:37:10,967 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:37:10,968 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:37:10,968 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:37:10,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:10,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:11,009 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2022-10-17 17:37:11,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:37:11,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:37:11,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:37:11,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:37:11,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:11,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:11,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:11,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:11,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:11,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:11,042 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:11,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:11,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:37:11,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:37:11,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:37:11,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:37:11,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:11,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:37:11,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:11,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:37:11,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:37:11,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:37:11,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-10-17 17:37:11,147 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-10-17 17:37:11,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-10-17 17:37:11,147 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-10-17 17:37:11,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-10-17 17:37:11,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-10-17 17:37:11,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:37:11,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:37:11,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:37:11,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:37:11,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:37:11,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:37:11,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:37:11,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:37:11,151 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 17:37:11,255 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:37:11,258 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:37:11,624 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:37:11,636 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:37:11,636 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-17 17:37:11,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:37:11 BoogieIcfgContainer [2022-10-17 17:37:11,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:37:11,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:37:11,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:37:11,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:37:11,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:37:10" (1/3) ... [2022-10-17 17:37:11,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70040267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:37:11, skipping insertion in model container [2022-10-17 17:37:11,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (2/3) ... [2022-10-17 17:37:11,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70040267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:37:11, skipping insertion in model container [2022-10-17 17:37:11,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:37:11" (3/3) ... [2022-10-17 17:37:11,656 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2022-10-17 17:37:11,669 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 17:37:11,680 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:37:11,682 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:37:11,683 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 17:37:11,880 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-10-17 17:37:11,935 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-10-17 17:37:11,950 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 184 transitions, 392 flow [2022-10-17 17:37:11,953 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 184 transitions, 392 flow [2022-10-17 17:37:11,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 184 transitions, 392 flow [2022-10-17 17:37:12,083 INFO L130 PetriNetUnfolder]: 15/181 cut-off events. [2022-10-17 17:37:12,083 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-10-17 17:37:12,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 181 events. 15/181 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 196 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-10-17 17:37:12,100 INFO L118 LiptonReduction]: Number of co-enabled transitions 3534 [2022-10-17 17:37:19,817 INFO L133 LiptonReduction]: Checked pairs total: 4234 [2022-10-17 17:37:19,824 INFO L135 LiptonReduction]: Total number of compositions: 187 [2022-10-17 17:37:19,839 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 32 transitions, 88 flow [2022-10-17 17:37:19,884 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 171 states, 170 states have (on average 3.588235294117647) internal successors, (610), 170 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:19,904 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:37:19,910 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@58b6840, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:37:19,911 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-10-17 17:37:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 170 states have (on average 3.588235294117647) internal successors, (610), 170 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:19,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 17:37:19,925 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:19,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:19,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:37:19,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash 44987973, now seen corresponding path program 1 times [2022-10-17 17:37:19,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:19,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845204796] [2022-10-17 17:37:19,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:19,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:20,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:20,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845204796] [2022-10-17 17:37:20,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845204796] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:20,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:20,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:37:20,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836512461] [2022-10-17 17:37:20,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:20,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:20,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:20,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:20,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:20,959 INFO L87 Difference]: Start difference. First operand has 171 states, 170 states have (on average 3.588235294117647) internal successors, (610), 170 states have internal predecessors, (610), 0 states have call successors, (0), 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 10.0) internal successors, (20), 3 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) [2022-10-17 17:37:21,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:21,105 INFO L93 Difference]: Finished difference Result 332 states and 1126 transitions. [2022-10-17 17:37:21,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:21,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 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 [2022-10-17 17:37:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:21,133 INFO L225 Difference]: With dead ends: 332 [2022-10-17 17:37:21,133 INFO L226 Difference]: Without dead ends: 325 [2022-10-17 17:37:21,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:21,140 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:21,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:37:21,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-10-17 17:37:21,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 295. [2022-10-17 17:37:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.4863945578231292) internal successors, (1025), 294 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:21,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 1025 transitions. [2022-10-17 17:37:21,241 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 1025 transitions. Word has length 20 [2022-10-17 17:37:21,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:21,243 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 1025 transitions. [2022-10-17 17:37:21,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 3 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) [2022-10-17 17:37:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 1025 transitions. [2022-10-17 17:37:21,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 17:37:21,251 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:21,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:21,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:37:21,252 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:37:21,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:21,252 INFO L85 PathProgramCache]: Analyzing trace with hash 517862425, now seen corresponding path program 1 times [2022-10-17 17:37:21,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:21,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689393143] [2022-10-17 17:37:21,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:21,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:21,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:21,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689393143] [2022-10-17 17:37:21,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689393143] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:21,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:21,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:37:21,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848502358] [2022-10-17 17:37:21,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:21,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:37:21,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:21,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:37:21,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:37:21,569 INFO L87 Difference]: Start difference. First operand 295 states and 1025 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2022-10-17 17:37:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:21,661 INFO L93 Difference]: Finished difference Result 296 states and 1026 transitions. [2022-10-17 17:37:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:21,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 [2022-10-17 17:37:21,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:21,666 INFO L225 Difference]: With dead ends: 296 [2022-10-17 17:37:21,666 INFO L226 Difference]: Without dead ends: 296 [2022-10-17 17:37:21,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:37:21,668 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:21,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:37:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-10-17 17:37:21,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-10-17 17:37:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.477966101694915) internal successors, (1026), 295 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 1026 transitions. [2022-10-17 17:37:21,691 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 1026 transitions. Word has length 21 [2022-10-17 17:37:21,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:21,691 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 1026 transitions. [2022-10-17 17:37:21,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2022-10-17 17:37:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 1026 transitions. [2022-10-17 17:37:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 17:37:21,694 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:21,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:21,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:37:21,695 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:37:21,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:21,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1000282230, now seen corresponding path program 1 times [2022-10-17 17:37:21,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:21,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397130978] [2022-10-17 17:37:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:21,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:21,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:21,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397130978] [2022-10-17 17:37:21,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397130978] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:21,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558145864] [2022-10-17 17:37:21,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:21,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:21,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:21,995 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:22,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:37:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:22,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 17:37:22,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:22,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:22,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558145864] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:22,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1869017943] [2022-10-17 17:37:22,711 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-10-17 17:37:22,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:37:22,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-10-17 17:37:22,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293766482] [2022-10-17 17:37:22,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:37:22,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 17:37:22,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:22,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 17:37:22,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:37:22,718 INFO L87 Difference]: Start difference. First operand 296 states and 1026 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2022-10-17 17:37:23,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:23,043 INFO L93 Difference]: Finished difference Result 586 states and 1962 transitions. [2022-10-17 17:37:23,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:37:23,044 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 22 [2022-10-17 17:37:23,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:23,049 INFO L225 Difference]: With dead ends: 586 [2022-10-17 17:37:23,050 INFO L226 Difference]: Without dead ends: 572 [2022-10-17 17:37:23,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:37:23,054 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 109 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:23,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 37 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:37:23,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-10-17 17:37:23,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 502. [2022-10-17 17:37:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.4790419161676644) internal successors, (1743), 501 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1743 transitions. [2022-10-17 17:37:23,108 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1743 transitions. Word has length 22 [2022-10-17 17:37:23,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:23,109 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 1743 transitions. [2022-10-17 17:37:23,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2022-10-17 17:37:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1743 transitions. [2022-10-17 17:37:23,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 17:37:23,112 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:23,113 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:23,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:23,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:23,327 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:37:23,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:23,327 INFO L85 PathProgramCache]: Analyzing trace with hash -818126279, now seen corresponding path program 2 times [2022-10-17 17:37:23,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:23,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951923332] [2022-10-17 17:37:23,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:23,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:23,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:23,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951923332] [2022-10-17 17:37:23,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951923332] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:23,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599861519] [2022-10-17 17:37:23,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:37:23,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:23,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:23,481 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:23,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:37:23,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 17:37:23,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:37:23,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 17:37:23,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:23,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:23,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599861519] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:23,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:37:23,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-10-17 17:37:23,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012212310] [2022-10-17 17:37:23,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:23,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:37:23,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:23,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:37:23,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:37:23,742 INFO L87 Difference]: Start difference. First operand 502 states and 1743 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:23,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:23,910 INFO L93 Difference]: Finished difference Result 556 states and 1917 transitions. [2022-10-17 17:37:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:37:23,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2022-10-17 17:37:23,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:23,917 INFO L225 Difference]: With dead ends: 556 [2022-10-17 17:37:23,917 INFO L226 Difference]: Without dead ends: 556 [2022-10-17 17:37:23,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:37:23,923 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 89 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:23,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 17 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:37:23,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-10-17 17:37:23,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 512. [2022-10-17 17:37:23,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 3.528375733855186) internal successors, (1803), 511 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:23,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1803 transitions. [2022-10-17 17:37:23,952 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1803 transitions. Word has length 23 [2022-10-17 17:37:23,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:23,953 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 1803 transitions. [2022-10-17 17:37:23,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:23,953 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1803 transitions. [2022-10-17 17:37:23,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 17:37:23,956 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:23,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:23,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:24,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:24,182 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:37:24,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:24,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1143255072, now seen corresponding path program 1 times [2022-10-17 17:37:24,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:24,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934748122] [2022-10-17 17:37:24,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:24,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:24,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:24,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934748122] [2022-10-17 17:37:24,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934748122] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:24,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696878405] [2022-10-17 17:37:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:24,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:24,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:24,426 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:24,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:37:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:24,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 17:37:24,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:24,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:24,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696878405] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:24,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1114547215] [2022-10-17 17:37:24,679 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-10-17 17:37:24,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:37:24,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-10-17 17:37:24,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640194019] [2022-10-17 17:37:24,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:37:24,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-17 17:37:24,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:24,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-17 17:37:24,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-10-17 17:37:24,683 INFO L87 Difference]: Start difference. First operand 512 states and 1803 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:24,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:24,932 INFO L93 Difference]: Finished difference Result 486 states and 1579 transitions. [2022-10-17 17:37:24,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:37:24,934 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 [2022-10-17 17:37:24,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:24,939 INFO L225 Difference]: With dead ends: 486 [2022-10-17 17:37:24,939 INFO L226 Difference]: Without dead ends: 456 [2022-10-17 17:37:24,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:37:24,940 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 142 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:24,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 18 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:37:24,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-10-17 17:37:24,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 422. [2022-10-17 17:37:24,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.3966745843230406) internal successors, (1430), 421 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1430 transitions. [2022-10-17 17:37:24,966 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1430 transitions. Word has length 23 [2022-10-17 17:37:24,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:24,967 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 1430 transitions. [2022-10-17 17:37:24,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1430 transitions. [2022-10-17 17:37:24,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 17:37:24,969 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:24,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:25,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:25,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:25,186 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:37:25,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:25,187 INFO L85 PathProgramCache]: Analyzing trace with hash -119804464, now seen corresponding path program 1 times [2022-10-17 17:37:25,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:25,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274522352] [2022-10-17 17:37:25,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:25,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:25,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:25,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274522352] [2022-10-17 17:37:25,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274522352] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:25,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153759749] [2022-10-17 17:37:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:25,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:25,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:25,406 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:25,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:37:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:25,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 17:37:25,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:25,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:25,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153759749] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:25,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2115586508] [2022-10-17 17:37:25,622 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-10-17 17:37:25,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:37:25,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-10-17 17:37:25,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506796745] [2022-10-17 17:37:25,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:37:25,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 17:37:25,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:25,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 17:37:25,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:37:25,627 INFO L87 Difference]: Start difference. First operand 422 states and 1430 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:25,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:25,843 INFO L93 Difference]: Finished difference Result 334 states and 1134 transitions. [2022-10-17 17:37:25,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:37:25,843 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-10-17 17:37:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:25,846 INFO L225 Difference]: With dead ends: 334 [2022-10-17 17:37:25,846 INFO L226 Difference]: Without dead ends: 281 [2022-10-17 17:37:25,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:37:25,847 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 61 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:25,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 39 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:37:25,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-10-17 17:37:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-10-17 17:37:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.6285714285714286) internal successors, (1016), 280 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 1016 transitions. [2022-10-17 17:37:25,862 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 1016 transitions. Word has length 23 [2022-10-17 17:37:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:25,862 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 1016 transitions. [2022-10-17 17:37:25,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 1016 transitions. [2022-10-17 17:37:25,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 17:37:25,865 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:25,865 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:25,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:26,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:26,090 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:37:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:26,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1232062721, now seen corresponding path program 2 times [2022-10-17 17:37:26,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:26,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754096946] [2022-10-17 17:37:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:26,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:26,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:26,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754096946] [2022-10-17 17:37:26,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754096946] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:26,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670503269] [2022-10-17 17:37:26,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:37:26,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:26,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:26,301 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:26,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:37:26,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 17:37:26,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:37:26,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 17:37:26,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:26,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:26,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670503269] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:26,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:37:26,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2022-10-17 17:37:26,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460862409] [2022-10-17 17:37:26,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:26,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:37:26,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:26,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:37:26,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-10-17 17:37:26,645 INFO L87 Difference]: Start difference. First operand 281 states and 1016 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:26,845 INFO L93 Difference]: Finished difference Result 417 states and 1520 transitions. [2022-10-17 17:37:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:37:26,846 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2022-10-17 17:37:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:26,850 INFO L225 Difference]: With dead ends: 417 [2022-10-17 17:37:26,851 INFO L226 Difference]: Without dead ends: 417 [2022-10-17 17:37:26,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-10-17 17:37:26,852 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 108 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:26,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 16 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:37:26,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-10-17 17:37:26,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 325. [2022-10-17 17:37:26,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.6018518518518516) internal successors, (1167), 324 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:26,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 1167 transitions. [2022-10-17 17:37:26,870 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 1167 transitions. Word has length 24 [2022-10-17 17:37:26,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:26,870 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 1167 transitions. [2022-10-17 17:37:26,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:26,871 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 1167 transitions. [2022-10-17 17:37:26,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 17:37:26,874 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:26,874 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:26,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:27,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:27,094 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:37:27,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:27,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1785255867, now seen corresponding path program 1 times [2022-10-17 17:37:27,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:27,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026309836] [2022-10-17 17:37:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:27,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:37:27,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:27,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026309836] [2022-10-17 17:37:27,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026309836] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:27,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:27,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:37:27,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443138852] [2022-10-17 17:37:27,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:27,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:27,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:27,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:27,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:27,178 INFO L87 Difference]: Start difference. First operand 325 states and 1167 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:27,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:27,234 INFO L93 Difference]: Finished difference Result 359 states and 1256 transitions. [2022-10-17 17:37:27,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:27,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2022-10-17 17:37:27,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:27,239 INFO L225 Difference]: With dead ends: 359 [2022-10-17 17:37:27,239 INFO L226 Difference]: Without dead ends: 359 [2022-10-17 17:37:27,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:27,240 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:27,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 5 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:37:27,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-10-17 17:37:27,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 301. [2022-10-17 17:37:27,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.55) internal successors, (1065), 300 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 1065 transitions. [2022-10-17 17:37:27,279 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 1065 transitions. Word has length 24 [2022-10-17 17:37:27,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:27,279 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 1065 transitions. [2022-10-17 17:37:27,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:27,279 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 1065 transitions. [2022-10-17 17:37:27,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 17:37:27,281 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:27,281 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:27,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 17:37:27,282 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:37:27,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:27,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1441151645, now seen corresponding path program 3 times [2022-10-17 17:37:27,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:27,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710914640] [2022-10-17 17:37:27,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:27,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:27,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:27,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710914640] [2022-10-17 17:37:27,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710914640] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:27,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051631137] [2022-10-17 17:37:27,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 17:37:27,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:27,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:27,466 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:27,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 17:37:27,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 17:37:27,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:37:27,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 17:37:27,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:27,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:27,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051631137] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:27,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:37:27,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 17 [2022-10-17 17:37:27,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850654267] [2022-10-17 17:37:27,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:27,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:37:27,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:27,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:37:27,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-10-17 17:37:27,774 INFO L87 Difference]: Start difference. First operand 301 states and 1065 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:27,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:27,998 INFO L93 Difference]: Finished difference Result 459 states and 1634 transitions. [2022-10-17 17:37:27,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:37:27,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2022-10-17 17:37:27,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:28,003 INFO L225 Difference]: With dead ends: 459 [2022-10-17 17:37:28,004 INFO L226 Difference]: Without dead ends: 459 [2022-10-17 17:37:28,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-10-17 17:37:28,005 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 150 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:28,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 12 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:37:28,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-10-17 17:37:28,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 329. [2022-10-17 17:37:28,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.643292682926829) internal successors, (1195), 328 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:28,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1195 transitions. [2022-10-17 17:37:28,026 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1195 transitions. Word has length 24 [2022-10-17 17:37:28,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:28,026 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 1195 transitions. [2022-10-17 17:37:28,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:28,027 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1195 transitions. [2022-10-17 17:37:28,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 17:37:28,029 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:28,029 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:28,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:28,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-10-17 17:37:28,242 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:37:28,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:28,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1038718437, now seen corresponding path program 4 times [2022-10-17 17:37:28,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:28,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067989529] [2022-10-17 17:37:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:28,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:28,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:28,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067989529] [2022-10-17 17:37:28,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067989529] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:28,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131764525] [2022-10-17 17:37:28,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-17 17:37:28,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:28,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:28,448 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:28,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 17:37:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:28,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 17:37:28,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:28,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:28,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131764525] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:28,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:37:28,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2022-10-17 17:37:28,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160300721] [2022-10-17 17:37:28,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:28,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:37:28,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:28,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:37:28,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-10-17 17:37:28,765 INFO L87 Difference]: Start difference. First operand 329 states and 1195 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:28,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:28,992 INFO L93 Difference]: Finished difference Result 515 states and 1855 transitions. [2022-10-17 17:37:28,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:37:28,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2022-10-17 17:37:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:28,998 INFO L225 Difference]: With dead ends: 515 [2022-10-17 17:37:28,999 INFO L226 Difference]: Without dead ends: 515 [2022-10-17 17:37:28,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-10-17 17:37:29,000 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 113 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:29,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 13 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:37:29,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-10-17 17:37:29,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 329. [2022-10-17 17:37:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.643292682926829) internal successors, (1195), 328 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:29,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1195 transitions. [2022-10-17 17:37:29,022 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1195 transitions. Word has length 24 [2022-10-17 17:37:29,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:29,023 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 1195 transitions. [2022-10-17 17:37:29,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:29,023 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1195 transitions. [2022-10-17 17:37:29,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 17:37:29,025 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:29,025 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:29,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-10-17 17:37:29,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 17:37:29,238 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:37:29,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:29,239 INFO L85 PathProgramCache]: Analyzing trace with hash -281223985, now seen corresponding path program 5 times [2022-10-17 17:37:29,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:29,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593225197] [2022-10-17 17:37:29,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:29,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:29,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:29,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593225197] [2022-10-17 17:37:29,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593225197] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:29,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397008871] [2022-10-17 17:37:29,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:37:29,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:29,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:29,414 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:29,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 17:37:29,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 17:37:29,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:37:29,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 17:37:29,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:29,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:29,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397008871] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:29,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:37:29,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 17 [2022-10-17 17:37:29,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74186578] [2022-10-17 17:37:29,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:29,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:37:29,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:29,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:37:29,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-10-17 17:37:29,755 INFO L87 Difference]: Start difference. First operand 329 states and 1195 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:30,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:30,002 INFO L93 Difference]: Finished difference Result 499 states and 1774 transitions. [2022-10-17 17:37:30,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:37:30,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2022-10-17 17:37:30,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:30,007 INFO L225 Difference]: With dead ends: 499 [2022-10-17 17:37:30,008 INFO L226 Difference]: Without dead ends: 499 [2022-10-17 17:37:30,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-10-17 17:37:30,009 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 136 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:30,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 16 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:37:30,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-10-17 17:37:30,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 345. [2022-10-17 17:37:30,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.73546511627907) internal successors, (1285), 344 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:30,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1285 transitions. [2022-10-17 17:37:30,029 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1285 transitions. Word has length 24 [2022-10-17 17:37:30,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:30,030 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 1285 transitions. [2022-10-17 17:37:30,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:30,031 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1285 transitions. [2022-10-17 17:37:30,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 17:37:30,033 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:30,033 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:30,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:30,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-17 17:37:30,254 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:37:30,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:30,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1533873229, now seen corresponding path program 6 times [2022-10-17 17:37:30,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:30,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592789627] [2022-10-17 17:37:30,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:30,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:30,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:30,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592789627] [2022-10-17 17:37:30,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592789627] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:30,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152767140] [2022-10-17 17:37:30,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 17:37:30,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:30,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:30,404 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:30,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 17:37:30,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 17:37:30,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:37:30,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 17:37:30,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:30,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:30,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152767140] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:30,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:37:30,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2022-10-17 17:37:30,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868261544] [2022-10-17 17:37:30,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:30,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:37:30,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:30,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:37:30,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-10-17 17:37:30,739 INFO L87 Difference]: Start difference. First operand 345 states and 1285 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:30,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:30,988 INFO L93 Difference]: Finished difference Result 543 states and 1952 transitions. [2022-10-17 17:37:30,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:37:30,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2022-10-17 17:37:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:30,995 INFO L225 Difference]: With dead ends: 543 [2022-10-17 17:37:30,995 INFO L226 Difference]: Without dead ends: 543 [2022-10-17 17:37:30,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-10-17 17:37:30,996 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 76 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:30,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 19 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:37:30,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-10-17 17:37:31,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 331. [2022-10-17 17:37:31,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.6333333333333333) internal successors, (1199), 330 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1199 transitions. [2022-10-17 17:37:31,017 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1199 transitions. Word has length 24 [2022-10-17 17:37:31,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:31,017 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 1199 transitions. [2022-10-17 17:37:31,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:31,018 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1199 transitions. [2022-10-17 17:37:31,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 17:37:31,019 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:31,020 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:31,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:31,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-17 17:37:31,242 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:37:31,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:31,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1139318205, now seen corresponding path program 7 times [2022-10-17 17:37:31,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:31,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352522425] [2022-10-17 17:37:31,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:31,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:31,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:31,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352522425] [2022-10-17 17:37:31,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352522425] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:31,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193467743] [2022-10-17 17:37:31,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-17 17:37:31,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:31,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:31,396 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:31,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 17:37:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:31,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 17:37:31,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:31,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:31,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193467743] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:31,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:37:31,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2022-10-17 17:37:31,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168611093] [2022-10-17 17:37:31,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:31,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:37:31,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:31,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:37:31,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-10-17 17:37:31,690 INFO L87 Difference]: Start difference. First operand 331 states and 1199 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:31,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:31,967 INFO L93 Difference]: Finished difference Result 425 states and 1535 transitions. [2022-10-17 17:37:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 17:37:31,967 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2022-10-17 17:37:31,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:31,971 INFO L225 Difference]: With dead ends: 425 [2022-10-17 17:37:31,971 INFO L226 Difference]: Without dead ends: 425 [2022-10-17 17:37:31,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-10-17 17:37:31,972 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:31,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 22 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:37:31,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-10-17 17:37:31,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 333. [2022-10-17 17:37:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.61144578313253) internal successors, (1199), 332 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:31,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1199 transitions. [2022-10-17 17:37:31,992 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1199 transitions. Word has length 24 [2022-10-17 17:37:31,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:31,993 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 1199 transitions. [2022-10-17 17:37:31,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:31,993 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1199 transitions. [2022-10-17 17:37:31,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 17:37:31,995 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:31,995 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:32,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:32,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:32,210 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:37:32,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:32,211 INFO L85 PathProgramCache]: Analyzing trace with hash -826068459, now seen corresponding path program 1 times [2022-10-17 17:37:32,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:32,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522802012] [2022-10-17 17:37:32,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:32,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:34,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:34,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522802012] [2022-10-17 17:37:34,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522802012] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:34,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358258521] [2022-10-17 17:37:34,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:34,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:34,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:34,982 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:35,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f61fcc-0fca-4740-a13c-169f2cbefa23/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-17 17:37:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:35,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 39 conjunts are in the unsatisfiable core [2022-10-17 17:37:35,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:36,270 INFO L356 Elim1Store]: treesize reduction 52, result has 60.9 percent of original size [2022-10-17 17:37:36,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 122 [2022-10-17 17:37:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:36,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:37,448 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:37:37,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 160 treesize of output 148 [2022-10-17 17:37:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-17 17:37:38,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358258521] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:38,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065853416] [2022-10-17 17:37:38,300 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-10-17 17:37:38,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:37:38,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 33 [2022-10-17 17:37:38,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917398583] [2022-10-17 17:37:38,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:37:38,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-17 17:37:38,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:38,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-17 17:37:38,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2022-10-17 17:37:38,304 INFO L87 Difference]: Start difference. First operand 333 states and 1199 transitions. Second operand has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)