./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:11:07,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:11:07,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:11:07,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:11:07,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:11:07,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:11:07,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:11:07,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:11:07,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:11:07,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:11:07,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:11:07,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:11:07,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:11:07,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:11:07,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:11:07,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:11:07,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:11:07,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:11:07,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:11:07,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:11:07,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:11:07,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:11:07,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:11:07,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:11:07,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:11:07,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:11:07,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:11:07,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:11:07,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:11:07,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:11:07,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:11:07,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:11:07,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:11:07,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:11:07,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:11:07,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:11:07,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:11:07,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:11:07,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:11:07,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:11:07,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:11:07,512 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:11:07,547 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:11:07,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:11:07,547 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:11:07,548 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:11:07,548 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:11:07,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:11:07,552 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:11:07,552 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:11:07,553 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:11:07,553 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:11:07,554 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:11:07,554 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:11:07,554 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:11:07,554 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:11:07,554 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:11:07,555 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:11:07,555 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:11:07,555 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:11:07,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:11:07,556 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:11:07,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:11:07,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:11:07,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:11:07,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:11:07,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:11:07,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:11:07,558 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:11:07,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:11:07,558 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:11:07,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:11:07,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:11:07,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:11:07,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:11:07,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:11:07,559 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:11:07,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:11:07,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:11:07,560 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:11:07,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:11:07,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:11:07,562 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:11:07,562 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_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 [2022-11-03 02:11:07,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:11:07,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:11:07,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:11:07,917 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:11:07,918 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:11:07,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-11-03 02:11:07,994 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/data/67ed3e9b8/32a21d80434d4fb7a99262fe4ed260d0/FLAG84743518e [2022-11-03 02:11:08,494 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:11:08,495 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-11-03 02:11:08,502 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/data/67ed3e9b8/32a21d80434d4fb7a99262fe4ed260d0/FLAG84743518e [2022-11-03 02:11:08,852 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/data/67ed3e9b8/32a21d80434d4fb7a99262fe4ed260d0 [2022-11-03 02:11:08,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:11:08,859 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:11:08,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:11:08,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:11:08,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:11:08,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:11:08" (1/1) ... [2022-11-03 02:11:08,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@110eecbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:08, skipping insertion in model container [2022-11-03 02:11:08,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:11:08" (1/1) ... [2022-11-03 02:11:08,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:11:08,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:11:09,151 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_c78a6736-6023-46b9-b1e1-10e2d3d55069/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2728,2741] [2022-11-03 02:11:09,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:11:09,186 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:11:09,234 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2728,2741] [2022-11-03 02:11:09,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:11:09,255 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:11:09,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:09 WrapperNode [2022-11-03 02:11:09,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:11:09,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:11:09,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:11:09,257 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:11:09,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:09" (1/1) ... [2022-11-03 02:11:09,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:09" (1/1) ... [2022-11-03 02:11:09,333 INFO L138 Inliner]: procedures = 26, calls = 49, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 277 [2022-11-03 02:11:09,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:11:09,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:11:09,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:11:09,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:11:09,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:09" (1/1) ... [2022-11-03 02:11:09,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:09" (1/1) ... [2022-11-03 02:11:09,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:09" (1/1) ... [2022-11-03 02:11:09,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:09" (1/1) ... [2022-11-03 02:11:09,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:09" (1/1) ... [2022-11-03 02:11:09,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:09" (1/1) ... [2022-11-03 02:11:09,367 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:09" (1/1) ... [2022-11-03 02:11:09,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:09" (1/1) ... [2022-11-03 02:11:09,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:11:09,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:11:09,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:11:09,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:11:09,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:09" (1/1) ... [2022-11-03 02:11:09,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:11:09,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:09,422 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:11:09,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:11:09,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:11:09,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:11:09,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:11:09,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:11:09,473 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-03 02:11:09,473 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-03 02:11:09,473 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-03 02:11:09,473 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-03 02:11:09,473 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-03 02:11:09,474 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-03 02:11:09,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:11:09,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:11:09,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:11:09,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:11:09,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:11:09,476 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-03 02:11:09,643 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:11:09,645 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:11:10,132 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:11:10,144 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:11:10,144 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-03 02:11:10,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:11:10 BoogieIcfgContainer [2022-11-03 02:11:10,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:11:10,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:11:10,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:11:10,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:11:10,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:11:08" (1/3) ... [2022-11-03 02:11:10,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a19768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:11:10, skipping insertion in model container [2022-11-03 02:11:10,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:11:09" (2/3) ... [2022-11-03 02:11:10,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a19768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:11:10, skipping insertion in model container [2022-11-03 02:11:10,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:11:10" (3/3) ... [2022-11-03 02:11:10,164 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2022-11-03 02:11:10,174 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-03 02:11:10,183 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:11:10,183 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:11:10,183 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-03 02:11:10,335 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-03 02:11:10,391 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 02:11:10,409 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 350 transitions, 724 flow [2022-11-03 02:11:10,418 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 350 transitions, 724 flow [2022-11-03 02:11:10,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 350 transitions, 724 flow [2022-11-03 02:11:10,638 INFO L130 PetriNetUnfolder]: 28/347 cut-off events. [2022-11-03 02:11:10,638 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-03 02:11:10,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 347 events. 28/347 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 584 event pairs, 0 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 269. Up to 3 conditions per place. [2022-11-03 02:11:10,661 INFO L118 LiptonReduction]: Number of co-enabled transitions 18600 [2022-11-03 02:11:22,779 INFO L133 LiptonReduction]: Checked pairs total: 19625 [2022-11-03 02:11:22,780 INFO L135 LiptonReduction]: Total number of compositions: 389 [2022-11-03 02:11:22,788 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 40 transitions, 104 flow [2022-11-03 02:11:22,838 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 349 states, 348 states have (on average 3.5344827586206895) internal successors, (1230), 348 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:22,857 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:11:22,864 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;@1c355585, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:11:22,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-03 02:11:22,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 349 states, 348 states have (on average 3.5344827586206895) internal successors, (1230), 348 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:22,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:11:22,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:22,883 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] [2022-11-03 02:11:22,883 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)] === [2022-11-03 02:11:22,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:22,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1121102612, now seen corresponding path program 1 times [2022-11-03 02:11:22,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:11:22,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543423810] [2022-11-03 02:11:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:22,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:11:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:23,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:11:23,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543423810] [2022-11-03 02:11:23,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543423810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:23,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:23,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:11:23,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884318283] [2022-11-03 02:11:23,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:23,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:23,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:11:23,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:23,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:23,871 INFO L87 Difference]: Start difference. First operand has 349 states, 348 states have (on average 3.5344827586206895) internal successors, (1230), 348 states have internal predecessors, (1230), 0 states have call successors, (0), 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 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:24,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:24,140 INFO L93 Difference]: Finished difference Result 790 states and 2710 transitions. [2022-11-03 02:11:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:11:24,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 [2022-11-03 02:11:24,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:24,174 INFO L225 Difference]: With dead ends: 790 [2022-11-03 02:11:24,174 INFO L226 Difference]: Without dead ends: 697 [2022-11-03 02:11:24,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:11:24,181 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 77 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:24,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 9 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:24,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-11-03 02:11:24,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 503. [2022-11-03 02:11:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 3.603585657370518) internal successors, (1809), 502 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1809 transitions. [2022-11-03 02:11:24,284 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1809 transitions. Word has length 22 [2022-11-03 02:11:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:24,285 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 1809 transitions. [2022-11-03 02:11:24,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:24,286 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1809 transitions. [2022-11-03 02:11:24,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 02:11:24,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:24,296 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] [2022-11-03 02:11:24,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:11:24,296 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)] === [2022-11-03 02:11:24,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:24,297 INFO L85 PathProgramCache]: Analyzing trace with hash -827454157, now seen corresponding path program 1 times [2022-11-03 02:11:24,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:11:24,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259613649] [2022-11-03 02:11:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:24,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:11:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:24,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:11:24,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259613649] [2022-11-03 02:11:24,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259613649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:11:24,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224855759] [2022-11-03 02:11:24,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:24,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:24,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:24,868 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:11:24,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:11:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:25,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:11:25,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:11:25,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:25,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224855759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:25,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:11:25,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2022-11-03 02:11:25,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327718181] [2022-11-03 02:11:25,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:25,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:25,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:11:25,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:25,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:11:25,194 INFO L87 Difference]: Start difference. First operand 503 states and 1809 transitions. Second operand has 5 states, 4 states have (on average 5.75) 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) [2022-11-03 02:11:25,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:25,512 INFO L93 Difference]: Finished difference Result 1671 states and 5837 transitions. [2022-11-03 02:11:25,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:11:25,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) 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 [2022-11-03 02:11:25,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:25,524 INFO L225 Difference]: With dead ends: 1671 [2022-11-03 02:11:25,524 INFO L226 Difference]: Without dead ends: 1501 [2022-11-03 02:11:25,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:11:25,531 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 178 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:25,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 9 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:25,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-11-03 02:11:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 761. [2022-11-03 02:11:25,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.642105263157895) internal successors, (2768), 760 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2768 transitions. [2022-11-03 02:11:25,606 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2768 transitions. Word has length 23 [2022-11-03 02:11:25,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:25,606 INFO L495 AbstractCegarLoop]: Abstraction has 761 states and 2768 transitions. [2022-11-03 02:11:25,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) 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) [2022-11-03 02:11:25,607 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2768 transitions. [2022-11-03 02:11:25,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 02:11:25,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:25,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:11:25,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:25,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:25,837 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)] === [2022-11-03 02:11:25,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:25,838 INFO L85 PathProgramCache]: Analyzing trace with hash 676851530, now seen corresponding path program 1 times [2022-11-03 02:11:25,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:11:25,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514541373] [2022-11-03 02:11:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:25,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:11:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:26,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:11:26,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514541373] [2022-11-03 02:11:26,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514541373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:11:26,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894763213] [2022-11-03 02:11:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:26,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:26,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:26,188 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:11:26,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:11:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:26,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:11:26,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:26,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:26,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894763213] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:11:26,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:11:26,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-11-03 02:11:26,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312058844] [2022-11-03 02:11:26,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:26,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:11:26,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:11:26,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:11:26,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:11:26,639 INFO L87 Difference]: Start difference. First operand 761 states and 2768 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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) [2022-11-03 02:11:27,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:27,140 INFO L93 Difference]: Finished difference Result 1459 states and 4869 transitions. [2022-11-03 02:11:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:11:27,141 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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 [2022-11-03 02:11:27,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:27,151 INFO L225 Difference]: With dead ends: 1459 [2022-11-03 02:11:27,152 INFO L226 Difference]: Without dead ends: 1459 [2022-11-03 02:11:27,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:11:27,155 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 138 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:27,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 15 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:11:27,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2022-11-03 02:11:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 835. [2022-11-03 02:11:27,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.615107913669065) internal successors, (3015), 834 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 3015 transitions. [2022-11-03 02:11:27,199 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 3015 transitions. Word has length 24 [2022-11-03 02:11:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:27,200 INFO L495 AbstractCegarLoop]: Abstraction has 835 states and 3015 transitions. [2022-11-03 02:11:27,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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) [2022-11-03 02:11:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 3015 transitions. [2022-11-03 02:11:27,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 02:11:27,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:27,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:11:27,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:27,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:27,419 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)] === [2022-11-03 02:11:27,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:27,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2030564211, now seen corresponding path program 1 times [2022-11-03 02:11:27,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:11:27,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270161681] [2022-11-03 02:11:27,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:27,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:11:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:11:27,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:11:27,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270161681] [2022-11-03 02:11:27,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270161681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:27,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:27,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:11:27,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012231491] [2022-11-03 02:11:27,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:27,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:27,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:11:27,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:27,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:27,582 INFO L87 Difference]: Start difference. First operand 835 states and 3015 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:27,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:27,733 INFO L93 Difference]: Finished difference Result 759 states and 2596 transitions. [2022-11-03 02:11:27,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:11:27,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2022-11-03 02:11:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:27,738 INFO L225 Difference]: With dead ends: 759 [2022-11-03 02:11:27,738 INFO L226 Difference]: Without dead ends: 601 [2022-11-03 02:11:27,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:27,739 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:27,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 9 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:11:27,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-11-03 02:11:27,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2022-11-03 02:11:27,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 3.545) internal successors, (2127), 600 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 2127 transitions. [2022-11-03 02:11:27,761 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 2127 transitions. Word has length 26 [2022-11-03 02:11:27,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:27,762 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 2127 transitions. [2022-11-03 02:11:27,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:27,762 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 2127 transitions. [2022-11-03 02:11:27,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 02:11:27,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:27,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:11:27,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:11:27,765 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)] === [2022-11-03 02:11:27,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:27,766 INFO L85 PathProgramCache]: Analyzing trace with hash -97892653, now seen corresponding path program 1 times [2022-11-03 02:11:27,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:11:27,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647867838] [2022-11-03 02:11:27,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:27,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:11:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:11:28,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:11:28,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647867838] [2022-11-03 02:11:28,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647867838] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:28,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:28,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:28,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65216961] [2022-11-03 02:11:28,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:28,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:28,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:11:28,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:28,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:28,015 INFO L87 Difference]: Start difference. First operand 601 states and 2127 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:28,210 INFO L93 Difference]: Finished difference Result 645 states and 2109 transitions. [2022-11-03 02:11:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:28,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2022-11-03 02:11:28,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:28,214 INFO L225 Difference]: With dead ends: 645 [2022-11-03 02:11:28,214 INFO L226 Difference]: Without dead ends: 401 [2022-11-03 02:11:28,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:11:28,215 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 83 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:28,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 9 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:28,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-11-03 02:11:28,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2022-11-03 02:11:28,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.515) internal successors, (1406), 400 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1406 transitions. [2022-11-03 02:11:28,231 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1406 transitions. Word has length 26 [2022-11-03 02:11:28,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:28,232 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 1406 transitions. [2022-11-03 02:11:28,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:28,232 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1406 transitions. [2022-11-03 02:11:28,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 02:11:28,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:28,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:11:28,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:11:28,235 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)] === [2022-11-03 02:11:28,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:28,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1080221177, now seen corresponding path program 1 times [2022-11-03 02:11:28,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:11:28,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824942771] [2022-11-03 02:11:28,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:28,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:11:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:11:28,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:11:28,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824942771] [2022-11-03 02:11:28,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824942771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:11:28,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23975728] [2022-11-03 02:11:28,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:28,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:28,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:28,749 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:11:28,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:11:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:28,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:11:28,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:11:29,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:11:29,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23975728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:29,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [186707350] [2022-11-03 02:11:29,157 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:11:29,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:11:29,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 16 [2022-11-03 02:11:29,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764451228] [2022-11-03 02:11:29,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:11:29,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 02:11:29,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:11:29,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 02:11:29,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:11:29,166 INFO L87 Difference]: Start difference. First operand 401 states and 1406 transitions. Second operand has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:30,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:30,570 INFO L93 Difference]: Finished difference Result 2265 states and 7536 transitions. [2022-11-03 02:11:30,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:11:30,571 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 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 26 [2022-11-03 02:11:30,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:30,578 INFO L225 Difference]: With dead ends: 2265 [2022-11-03 02:11:30,578 INFO L226 Difference]: Without dead ends: 1198 [2022-11-03 02:11:30,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=358, Invalid=1282, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 02:11:30,579 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1029 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:30,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1029 Valid, 49 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:11:30,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-11-03 02:11:30,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 558. [2022-11-03 02:11:30,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.569120287253142) internal successors, (1988), 557 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1988 transitions. [2022-11-03 02:11:30,605 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1988 transitions. Word has length 26 [2022-11-03 02:11:30,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:30,605 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 1988 transitions. [2022-11-03 02:11:30,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:30,606 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1988 transitions. [2022-11-03 02:11:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:11:30,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:30,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:11:30,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:30,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:30,823 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)] === [2022-11-03 02:11:30,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:30,823 INFO L85 PathProgramCache]: Analyzing trace with hash -615364354, now seen corresponding path program 1 times [2022-11-03 02:11:30,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:11:30,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713097665] [2022-11-03 02:11:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:30,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:11:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:11:31,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:11:31,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713097665] [2022-11-03 02:11:31,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713097665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:11:31,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866471403] [2022-11-03 02:11:31,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:31,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:31,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:31,088 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:11:31,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:11:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:31,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:11:31,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:11:31,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:11:31,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866471403] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:11:31,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:11:31,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2022-11-03 02:11:31,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59251765] [2022-11-03 02:11:31,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:31,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:11:31,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:11:31,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:11:31,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:11:31,472 INFO L87 Difference]: Start difference. First operand 558 states and 1988 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:31,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:31,647 INFO L93 Difference]: Finished difference Result 738 states and 2524 transitions. [2022-11-03 02:11:31,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:31,648 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-03 02:11:31,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:31,653 INFO L225 Difference]: With dead ends: 738 [2022-11-03 02:11:31,653 INFO L226 Difference]: Without dead ends: 738 [2022-11-03 02:11:31,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:11:31,655 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 131 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:31,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 3 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:11:31,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-11-03 02:11:31,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 644. [2022-11-03 02:11:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 3.5645412130637637) internal successors, (2292), 643 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 2292 transitions. [2022-11-03 02:11:31,689 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 2292 transitions. Word has length 28 [2022-11-03 02:11:31,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:31,689 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 2292 transitions. [2022-11-03 02:11:31,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:31,690 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 2292 transitions. [2022-11-03 02:11:31,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 02:11:31,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:31,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:11:31,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:31,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:31,918 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)] === [2022-11-03 02:11:31,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:31,919 INFO L85 PathProgramCache]: Analyzing trace with hash 577463262, now seen corresponding path program 1 times [2022-11-03 02:11:31,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:11:31,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386168452] [2022-11-03 02:11:31,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:31,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:11:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:11:32,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:11:32,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386168452] [2022-11-03 02:11:32,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386168452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:11:32,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459069716] [2022-11-03 02:11:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:32,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:32,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:32,291 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:11:32,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:11:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:32,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:11:32,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:11:32,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:11:32,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459069716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:11:32,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1931512749] [2022-11-03 02:11:32,659 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:11:32,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:11:32,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-11-03 02:11:32,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272972225] [2022-11-03 02:11:32,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:11:32,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 02:11:32,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:11:32,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 02:11:32,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:11:32,661 INFO L87 Difference]: Start difference. First operand 644 states and 2292 transitions. Second operand has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:33,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:33,126 INFO L93 Difference]: Finished difference Result 2102 states and 7316 transitions. [2022-11-03 02:11:33,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:11:33,127 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-03 02:11:33,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:33,139 INFO L225 Difference]: With dead ends: 2102 [2022-11-03 02:11:33,139 INFO L226 Difference]: Without dead ends: 1916 [2022-11-03 02:11:33,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:11:33,141 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 406 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:33,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 22 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:11:33,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2022-11-03 02:11:33,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 930. [2022-11-03 02:11:33,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 3.6017222820236814) internal successors, (3346), 929 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:33,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 3346 transitions. [2022-11-03 02:11:33,193 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 3346 transitions. Word has length 30 [2022-11-03 02:11:33,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:33,194 INFO L495 AbstractCegarLoop]: Abstraction has 930 states and 3346 transitions. [2022-11-03 02:11:33,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:33,195 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 3346 transitions. [2022-11-03 02:11:33,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:11:33,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:33,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:11:33,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:33,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:33,419 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)] === [2022-11-03 02:11:33,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:33,419 INFO L85 PathProgramCache]: Analyzing trace with hash -2057291876, now seen corresponding path program 1 times [2022-11-03 02:11:33,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:11:33,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103036197] [2022-11-03 02:11:33,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:33,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:11:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:11:35,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:11:35,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103036197] [2022-11-03 02:11:35,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103036197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:11:35,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801813930] [2022-11-03 02:11:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:35,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:11:35,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:11:35,273 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:11:35,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c78a6736-6023-46b9-b1e1-10e2d3d55069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:11:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:35,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 02:11:35,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:35,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:11:35,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:11:35,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:11:36,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:11:36,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:11:36,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:11:36,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:11:36,884 INFO L356 Elim1Store]: treesize reduction 20, result has 54.5 percent of original size [2022-11-03 02:11:36,885 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 60 treesize of output 43 [2022-11-03 02:11:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:11:36,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:11:42,115 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse10 (* |c_thread2Thread1of1ForFork2_~i~1#1| 4))) (let ((.cse5 (+ .cse10 c_~a2~0.offset)) (.cse6 (+ .cse10 c_~a3~0.offset))) (let ((.cse7 (forall ((v_ArrVal_425 (Array Int Int)) (~a1~0.base Int) (~a2~0.base Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_425))) (let ((.cse8 (select .cse9 ~a2~0.base))) (or (< (select .cse8 .cse5) (+ (select (select .cse9 c_~a3~0.base) .cse6) 1)) (< (select (select .cse9 ~a1~0.base) c_~a1~0.offset) (+ (select .cse8 c_~a2~0.offset) 1)))))))) (and (forall ((v_ArrVal_425 (Array Int Int)) (~a2~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_425))) (let ((.cse2 (select .cse3 ~a2~0.base)) (.cse4 (select .cse3 c_~a3~0.base))) (or (forall ((~a1~0.base Int)) (let ((.cse1 (select .cse4 c_~a3~0.offset)) (.cse0 (select (select .cse3 ~a1~0.base) c_~a1~0.offset))) (or (< (+ .cse0 2147483648) .cse1) (< .cse1 .cse0) (= .cse1 .cse0) (< .cse0 (+ (select .cse2 c_~a2~0.offset) 1))))) (< (select .cse2 .cse5) (+ (select .cse4 .cse6) 1)))))) (or (< 0 c_~n1~0) .cse7) (or .cse7 (< 0 c_~n3~0)))))) is different from false [2022-11-03 02:11:43,852 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:11:43,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 75 [2022-11-03 02:11:43,922 INFO L356 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2022-11-03 02:11:43,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 14955 treesize of output 14208 [2022-11-03 02:11:44,109 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:11:44,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 14187 treesize of output 13443 [2022-11-03 02:11:44,315 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:11:44,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 13419 treesize of output 11907 [2022-11-03 02:11:44,503 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:11:44,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 11883 treesize of output 11523