./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 503a3e49b44041609ec1bba765b53912c88abb90ff278e61e68e863904faf4bb --- 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-38b53e6 [2022-11-25 15:50:45,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:50:45,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:50:45,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:50:45,102 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:50:45,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:50:45,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:50:45,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:50:45,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:50:45,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:50:45,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:50:45,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:50:45,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:50:45,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:50:45,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:50:45,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:50:45,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:50:45,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:50:45,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:50:45,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:50:45,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:50:45,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:50:45,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:50:45,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:50:45,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:50:45,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:50:45,144 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:50:45,145 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:50:45,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:50:45,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:50:45,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:50:45,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:50:45,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:50:45,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:50:45,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:50:45,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:50:45,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:50:45,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:50:45,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:50:45,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:50:45,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:50:45,166 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:50:45,202 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:50:45,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:50:45,203 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:50:45,204 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:50:45,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:50:45,205 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:50:45,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:50:45,206 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:50:45,206 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:50:45,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:50:45,207 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:50:45,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:50:45,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:50:45,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:50:45,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:50:45,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:50:45,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:50:45,209 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:50:45,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:50:45,210 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:50:45,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:50:45,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:50:45,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:50:45,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:50:45,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:50:45,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:50:45,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:50:45,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:50:45,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:50:45,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:50:45,213 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:50:45,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:50:45,214 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:50:45,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:50:45,214 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 503a3e49b44041609ec1bba765b53912c88abb90ff278e61e68e863904faf4bb [2022-11-25 15:50:45,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:50:45,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:50:45,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:50:45,617 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:50:45,617 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:50:45,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i [2022-11-25 15:50:48,729 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:50:48,970 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:50:48,970 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i [2022-11-25 15:50:48,988 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/data/c23297883/19b90fe13e684801a2f6283bb4c60760/FLAGc307c37af [2022-11-25 15:50:49,007 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/data/c23297883/19b90fe13e684801a2f6283bb4c60760 [2022-11-25 15:50:49,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:50:49,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:50:49,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:50:49,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:50:49,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:50:49,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:50:49" (1/1) ... [2022-11-25 15:50:49,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48fdad40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:50:49, skipping insertion in model container [2022-11-25 15:50:49,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:50:49" (1/1) ... [2022-11-25 15:50:49,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:50:49,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:50:49,448 WARN L237 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_2bb5ace5-2596-456b-bdaa-efbaac663521/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22534,22547] [2022-11-25 15:50:49,453 WARN L237 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_2bb5ace5-2596-456b-bdaa-efbaac663521/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22606,22619] [2022-11-25 15:50:49,454 WARN L237 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_2bb5ace5-2596-456b-bdaa-efbaac663521/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22746,22759] [2022-11-25 15:50:49,455 WARN L237 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_2bb5ace5-2596-456b-bdaa-efbaac663521/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22820,22833] [2022-11-25 15:50:49,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:50:49,469 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:50:49,504 WARN L237 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_2bb5ace5-2596-456b-bdaa-efbaac663521/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22534,22547] [2022-11-25 15:50:49,505 WARN L237 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_2bb5ace5-2596-456b-bdaa-efbaac663521/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22606,22619] [2022-11-25 15:50:49,507 WARN L237 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_2bb5ace5-2596-456b-bdaa-efbaac663521/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22746,22759] [2022-11-25 15:50:49,508 WARN L237 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_2bb5ace5-2596-456b-bdaa-efbaac663521/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22820,22833] [2022-11-25 15:50:49,511 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:50:49,535 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:50:49,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:50:49 WrapperNode [2022-11-25 15:50:49,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:50:49,537 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:50:49,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:50:49,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:50:49,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:50:49" (1/1) ... [2022-11-25 15:50:49,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:50:49" (1/1) ... [2022-11-25 15:50:49,578 INFO L138 Inliner]: procedures = 119, calls = 36, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 122 [2022-11-25 15:50:49,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:50:49,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:50:49,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:50:49,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:50:49,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:50:49" (1/1) ... [2022-11-25 15:50:49,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:50:49" (1/1) ... [2022-11-25 15:50:49,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:50:49" (1/1) ... [2022-11-25 15:50:49,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:50:49" (1/1) ... [2022-11-25 15:50:49,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:50:49" (1/1) ... [2022-11-25 15:50:49,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:50:49" (1/1) ... [2022-11-25 15:50:49,606 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:50:49" (1/1) ... [2022-11-25 15:50:49,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:50:49" (1/1) ... [2022-11-25 15:50:49,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:50:49,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:50:49,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:50:49,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:50:49,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:50:49" (1/1) ... [2022-11-25 15:50:49,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:50:49,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:50:49,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:50:49,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:50:49,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:50:49,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:50:49,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:50:49,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:50:49,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 15:50:49,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 15:50:49,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:50:49,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:50:49,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:50:49,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:50:49,800 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:50:49,802 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:50:50,060 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:50:50,066 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:50:50,070 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-25 15:50:50,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:50:50 BoogieIcfgContainer [2022-11-25 15:50:50,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:50:50,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:50:50,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:50:50,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:50:50,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:50:49" (1/3) ... [2022-11-25 15:50:50,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53fbb637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:50:50, skipping insertion in model container [2022-11-25 15:50:50,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:50:49" (2/3) ... [2022-11-25 15:50:50,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53fbb637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:50:50, skipping insertion in model container [2022-11-25 15:50:50,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:50:50" (3/3) ... [2022-11-25 15:50:50,085 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2022-11-25 15:50:50,105 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:50:50,105 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-25 15:50:50,169 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:50:50,176 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=PETRI_NET, 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;@c4cf8cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:50:50,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 15:50:50,182 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:50:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 15:50:50,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:50:50,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:50:50,192 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 15:50:50,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:50:50,200 INFO L85 PathProgramCache]: Analyzing trace with hash 889968582, now seen corresponding path program 1 times [2022-11-25 15:50:50,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:50:50,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557105910] [2022-11-25 15:50:50,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:50:50,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:50:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:50:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:50:50,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:50:50,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557105910] [2022-11-25 15:50:50,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557105910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:50:50,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:50:50,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:50:50,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282939637] [2022-11-25 15:50:50,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:50:50,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 15:50:50,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:50:50,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 15:50:50,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:50:50,562 INFO L87 Difference]: Start difference. First operand has 33 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:50:50,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:50:50,586 INFO L93 Difference]: Finished difference Result 61 states and 98 transitions. [2022-11-25 15:50:50,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 15:50:50,588 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 15:50:50,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:50:50,597 INFO L225 Difference]: With dead ends: 61 [2022-11-25 15:50:50,597 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 15:50:50,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:50:50,606 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:50:50,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:50:50,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 15:50:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-25 15:50:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:50:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-25 15:50:50,647 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2022-11-25 15:50:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:50:50,681 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-25 15:50:50,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:50:50,681 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-25 15:50:50,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 15:50:50,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:50:50,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:50:50,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:50:50,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 15:50:50,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:50:50,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1806853233, now seen corresponding path program 1 times [2022-11-25 15:50:50,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:50:50,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73437295] [2022-11-25 15:50:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:50:50,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:50:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:50:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:50:50,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:50:50,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73437295] [2022-11-25 15:50:50,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73437295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:50:50,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:50:50,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:50:50,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867362666] [2022-11-25 15:50:50,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:50:50,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:50:50,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:50:50,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:50:50,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:50:50,935 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:50:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:50:51,008 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-11-25 15:50:51,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:50:51,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-11-25 15:50:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:50:51,010 INFO L225 Difference]: With dead ends: 33 [2022-11-25 15:50:51,010 INFO L226 Difference]: Without dead ends: 31 [2022-11-25 15:50:51,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:50:51,012 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:50:51,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 29 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:50:51,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-25 15:50:51,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-11-25 15:50:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 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) [2022-11-25 15:50:51,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-25 15:50:51,019 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 7 [2022-11-25 15:50:51,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:50:51,019 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-25 15:50:51,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:50:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-25 15:50:51,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 15:50:51,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:50:51,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:50:51,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:50:51,021 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 15:50:51,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:50:51,022 INFO L85 PathProgramCache]: Analyzing trace with hash -856511048, now seen corresponding path program 1 times [2022-11-25 15:50:51,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:50:51,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937700368] [2022-11-25 15:50:51,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:50:51,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:50:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:50:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:50:51,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:50:51,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937700368] [2022-11-25 15:50:51,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937700368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:50:51,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:50:51,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:50:51,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340164954] [2022-11-25 15:50:51,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:50:51,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:50:51,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:50:51,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:50:51,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:50:51,431 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:50:51,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:50:51,601 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-11-25 15:50:51,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:50:51,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-25 15:50:51,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:50:51,606 INFO L225 Difference]: With dead ends: 50 [2022-11-25 15:50:51,607 INFO L226 Difference]: Without dead ends: 48 [2022-11-25 15:50:51,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:50:51,610 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:50:51,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 53 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:50:51,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-25 15:50:51,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2022-11-25 15:50:51,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:50:51,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-25 15:50:51,630 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 10 [2022-11-25 15:50:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:50:51,632 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-25 15:50:51,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:50:51,633 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-25 15:50:51,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 15:50:51,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:50:51,633 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:50:51,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:50:51,634 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 15:50:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:50:51,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1594081566, now seen corresponding path program 1 times [2022-11-25 15:50:51,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:50:51,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493005234] [2022-11-25 15:50:51,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:50:51,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:50:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:50:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:50:52,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:50:52,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493005234] [2022-11-25 15:50:52,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493005234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:50:52,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559638428] [2022-11-25 15:50:52,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:50:52,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:50:52,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:50:52,402 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:50:52,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:50:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:50:52,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 15:50:52,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:50:52,599 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-25 15:50:52,618 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 15:50:52,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 15:50:52,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:50:52,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-11-25 15:50:52,726 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 15:50:52,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 16 treesize of output 22 [2022-11-25 15:50:52,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 15:50:52,767 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 15:50:52,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 15:50:52,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:50:52,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:50:52,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-25 15:50:52,882 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-25 15:50:52,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 15:50:52,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 15:50:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:50:52,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:50:53,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:50:53,170 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-25 15:50:53,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 1 [2022-11-25 15:50:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:50:53,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559638428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:50:53,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:50:53,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-11-25 15:50:53,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269116414] [2022-11-25 15:50:53,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:50:53,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:50:53,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:50:53,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:50:53,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:50:53,175 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:50:53,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:50:53,527 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-11-25 15:50:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:50:53,528 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 15:50:53,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:50:53,528 INFO L225 Difference]: With dead ends: 38 [2022-11-25 15:50:53,528 INFO L226 Difference]: Without dead ends: 36 [2022-11-25 15:50:53,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:50:53,530 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:50:53,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 63 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:50:53,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-25 15:50:53,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2022-11-25 15:50:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 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) [2022-11-25 15:50:53,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-25 15:50:53,536 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2022-11-25 15:50:53,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:50:53,536 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-25 15:50:53,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:50:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-25 15:50:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 15:50:53,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:50:53,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:50:53,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:50:53,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:50:53,744 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 15:50:53,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:50:53,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1689639521, now seen corresponding path program 1 times [2022-11-25 15:50:53,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:50:53,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009351128] [2022-11-25 15:50:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:50:53,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:50:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:50:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:50:53,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:50:53,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009351128] [2022-11-25 15:50:53,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009351128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:50:53,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:50:53,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:50:53,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396136488] [2022-11-25 15:50:53,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:50:53,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:50:53,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:50:53,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:50:53,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:50:53,867 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:50:53,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:50:53,957 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-11-25 15:50:53,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:50:53,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-11-25 15:50:53,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:50:53,958 INFO L225 Difference]: With dead ends: 38 [2022-11-25 15:50:53,958 INFO L226 Difference]: Without dead ends: 26 [2022-11-25 15:50:53,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:50:53,959 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:50:53,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 52 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:50:53,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-25 15:50:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-25 15:50:53,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 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) [2022-11-25 15:50:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-25 15:50:53,975 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2022-11-25 15:50:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:50:53,975 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-25 15:50:53,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:50:53,975 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-25 15:50:53,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 15:50:53,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:50:53,976 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:50:53,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:50:53,977 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 15:50:53,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:50:53,978 INFO L85 PathProgramCache]: Analyzing trace with hash 2084817261, now seen corresponding path program 1 times [2022-11-25 15:50:53,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:50:53,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397944765] [2022-11-25 15:50:53,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:50:53,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:50:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:50:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:50:54,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:50:54,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397944765] [2022-11-25 15:50:54,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397944765] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:50:54,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158347298] [2022-11-25 15:50:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:50:54,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:50:54,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:50:54,213 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:50:54,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:50:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:50:54,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 15:50:54,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:50:54,363 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 15:50:54,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 84 [2022-11-25 15:50:54,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:50:54,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 17 [2022-11-25 15:50:54,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:50:54,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-25 15:50:54,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:50:54,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2022-11-25 15:50:54,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:50:54,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2022-11-25 15:50:54,522 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 15:50:54,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 84 [2022-11-25 15:50:54,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:50:54,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 17 [2022-11-25 15:50:54,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:50:54,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-25 15:50:54,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:50:54,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2022-11-25 15:50:54,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:50:54,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2022-11-25 15:50:55,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 15:50:55,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:50:55,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 58 [2022-11-25 15:50:55,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 15:50:55,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 15:50:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:50:55,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:50:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:50:55,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158347298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:50:55,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:50:55,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-25 15:50:55,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620702683] [2022-11-25 15:50:55,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:50:55,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:50:55,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:50:55,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:50:55,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=64, Unknown=2, NotChecked=0, Total=90 [2022-11-25 15:50:55,292 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:50:55,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:50:55,617 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2022-11-25 15:50:55,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:50:55,617 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-25 15:50:55,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:50:55,618 INFO L225 Difference]: With dead ends: 49 [2022-11-25 15:50:55,618 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 15:50:55,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=107, Unknown=3, NotChecked=0, Total=156 [2022-11-25 15:50:55,619 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:50:55,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 85 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 5 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:50:55,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 15:50:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-25 15:50:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:50:55,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-25 15:50:55,628 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2022-11-25 15:50:55,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:50:55,628 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-25 15:50:55,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:50:55,628 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-25 15:50:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 15:50:55,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:50:55,629 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:50:55,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:50:55,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 15:50:55,835 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 15:50:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:50:55,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1088473273, now seen corresponding path program 1 times [2022-11-25 15:50:55,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:50:55,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142485951] [2022-11-25 15:50:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:50:55,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:50:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:50:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:50:56,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:50:56,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142485951] [2022-11-25 15:50:56,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142485951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:50:56,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944059075] [2022-11-25 15:50:56,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:50:56,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:50:56,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:50:56,861 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:50:56,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:50:57,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:50:57,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 15:50:57,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:50:57,028 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 15:50:57,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 15:50:57,079 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-25 15:50:57,095 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 15:50:57,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 14 treesize of output 20 [2022-11-25 15:50:57,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 15:50:57,135 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-25 15:50:57,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2022-11-25 15:50:57,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-25 15:50:57,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 15:50:57,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:50:57,241 INFO L321 Elim1Store]: treesize reduction 31, result has 31.1 percent of original size [2022-11-25 15:50:57,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 54 [2022-11-25 15:50:57,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:50:57,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:50:57,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-11-25 15:50:57,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-11-25 15:50:57,320 INFO L321 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2022-11-25 15:50:57,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 53 [2022-11-25 15:50:57,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 15:50:57,772 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 15:50:57,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 27 [2022-11-25 15:50:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:50:57,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:50:57,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:50:57,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 40 treesize of output 41 [2022-11-25 15:50:57,863 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_513 (Array Int Int)) (v_ArrVal_517 (Array Int Int)) (v_ArrVal_516 (Array Int Int)) (v_arrayElimArr_9 (Array Int Int))) (let ((.cse0 (select v_arrayElimArr_9 |c_ULTIMATE.start_main_~end~0#1.offset|))) (or (not (= (select |c_#valid| .cse0) 0)) (not (= |c_ULTIMATE.start_main_~null~0#1.base| (select (let ((.cse1 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~end~0#1.base| v_arrayElimArr_9) .cse0 v_ArrVal_517))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|))) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~end~0#1.base| v_ArrVal_516) .cse0 v_ArrVal_513) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|))))))) is different from false [2022-11-25 15:50:57,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:50:57,880 INFO L350 Elim1Store]: Elim1 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 64 treesize of output 65 [2022-11-25 15:50:57,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:50:57,892 INFO L350 Elim1Store]: Elim1 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 56 treesize of output 49 [2022-11-25 15:50:57,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:50:57,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 1632 treesize of output 1245 [2022-11-25 15:50:58,025 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:50:58,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2703 treesize of output 2614 [2022-11-25 15:50:58,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:50:58,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2632 treesize of output 2314 [2022-11-25 15:50:58,332 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:50:58,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1755 treesize of output 1639 [2022-11-25 15:50:58,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 759 treesize of output 721 [2022-11-25 15:50:58,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 731 treesize of output 669 [2022-11-25 15:53:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:26,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944059075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:53:26,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:53:26,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-11-25 15:53:26,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194915163] [2022-11-25 15:53:26,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:53:26,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 15:53:26,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:53:26,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 15:53:26,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=232, Unknown=1, NotChecked=30, Total=306 [2022-11-25 15:53:26,634 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:27,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:53:27,895 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2022-11-25 15:53:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:53:27,903 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-25 15:53:27,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:53:27,904 INFO L225 Difference]: With dead ends: 84 [2022-11-25 15:53:27,904 INFO L226 Difference]: Without dead ends: 82 [2022-11-25 15:53:27,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=122, Invalid=531, Unknown=1, NotChecked=48, Total=702 [2022-11-25 15:53:27,905 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 155 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 15:53:27,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 237 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 256 Invalid, 0 Unknown, 61 Unchecked, 0.5s Time] [2022-11-25 15:53:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-25 15:53:27,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 42. [2022-11-25 15:53:27,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.2) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-11-25 15:53:27,918 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 20 [2022-11-25 15:53:27,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:53:27,918 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-11-25 15:53:27,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:27,918 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-11-25 15:53:27,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 15:53:27,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:53:27,919 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:53:27,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:28,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:53:28,127 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 15:53:28,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:28,128 INFO L85 PathProgramCache]: Analyzing trace with hash -67404919, now seen corresponding path program 1 times [2022-11-25 15:53:28,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:53:28,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114732002] [2022-11-25 15:53:28,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:53:28,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:53:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:53:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:28,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:53:28,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114732002] [2022-11-25 15:53:28,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114732002] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:53:28,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352992729] [2022-11-25 15:53:28,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:53:28,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:53:28,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:53:28,774 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:53:28,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:53:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:53:28,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 15:53:28,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:28,937 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 15:53:28,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 15:53:28,981 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-25 15:53:28,993 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 15:53:28,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 14 treesize of output 20 [2022-11-25 15:53:29,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 15:53:29,015 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-25 15:53:29,029 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 15:53:29,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 14 treesize of output 20 [2022-11-25 15:53:29,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 15:53:29,068 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 15:53:29,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 15:53:29,147 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 15:53:29,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 45 [2022-11-25 15:53:29,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-25 15:53:29,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 15:53:29,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-25 15:53:29,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 15:53:29,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 15:53:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:29,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:53:29,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 54 [2022-11-25 15:53:29,583 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_639 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~end~0#1.base| v_ArrVal_639) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) |c_ULTIMATE.start_main_~end~0#1.base|)) (forall ((v_ArrVal_640 (Array Int Int))) (= |c_ULTIMATE.start_main_~end~0#1.offset| (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~end~0#1.base| v_ArrVal_640) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|)))) is different from false [2022-11-25 15:53:29,596 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:53:29,596 INFO L350 Elim1Store]: Elim1 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 37 treesize of output 38 [2022-11-25 15:53:29,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:53:29,604 INFO L350 Elim1Store]: Elim1 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 41 treesize of output 42 [2022-11-25 15:53:29,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:53:29,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 47 [2022-11-25 15:53:29,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-11-25 15:53:29,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:53:29,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 51 [2022-11-25 15:53:29,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-11-25 15:53:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:53:29,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352992729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:53:29,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:53:29,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 24 [2022-11-25 15:53:29,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129963997] [2022-11-25 15:53:29,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:53:29,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 15:53:29,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:53:29,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 15:53:29,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=449, Unknown=1, NotChecked=42, Total=552 [2022-11-25 15:53:29,750 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:30,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:53:30,619 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2022-11-25 15:53:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 15:53:30,620 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-25 15:53:30,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:53:30,621 INFO L225 Difference]: With dead ends: 80 [2022-11-25 15:53:30,622 INFO L226 Difference]: Without dead ends: 68 [2022-11-25 15:53:30,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=824, Unknown=1, NotChecked=60, Total=1056 [2022-11-25 15:53:30,623 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 96 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:53:30,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 339 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 380 Invalid, 2 Unknown, 38 Unchecked, 0.3s Time] [2022-11-25 15:53:30,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-25 15:53:30,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2022-11-25 15:53:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2022-11-25 15:53:30,645 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 20 [2022-11-25 15:53:30,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:53:30,646 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2022-11-25 15:53:30,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:53:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2022-11-25 15:53:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 15:53:30,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:53:30,648 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:53:30,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:30,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 15:53:30,854 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 15:53:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:30,855 INFO L85 PathProgramCache]: Analyzing trace with hash 299800945, now seen corresponding path program 1 times [2022-11-25 15:53:30,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:53:30,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222028701] [2022-11-25 15:53:30,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:53:30,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:53:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:53:30,896 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:53:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:53:30,945 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:53:30,946 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:53:30,947 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-11-25 15:53:30,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-25 15:53:30,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-25 15:53:30,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-25 15:53:30,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 15:53:30,970 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:53:30,974 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 15:53:31,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 03:53:31 BoogieIcfgContainer [2022-11-25 15:53:31,018 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 15:53:31,018 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 15:53:31,019 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 15:53:31,019 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 15:53:31,019 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:50:50" (3/4) ... [2022-11-25 15:53:31,021 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-25 15:53:31,085 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/witness.graphml [2022-11-25 15:53:31,085 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 15:53:31,086 INFO L158 Benchmark]: Toolchain (without parser) took 162072.10ms. Allocated memory was 188.7MB in the beginning and 650.1MB in the end (delta: 461.4MB). Free memory was 139.3MB in the beginning and 530.5MB in the end (delta: -391.2MB). Peak memory consumption was 71.7MB. Max. memory is 16.1GB. [2022-11-25 15:53:31,086 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 188.7MB. Free memory is still 158.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 15:53:31,087 INFO L158 Benchmark]: CACSL2BoogieTranslator took 517.70ms. Allocated memory is still 188.7MB. Free memory was 139.3MB in the beginning and 121.0MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-25 15:53:31,087 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.23ms. Allocated memory is still 188.7MB. Free memory was 121.0MB in the beginning and 118.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 15:53:31,088 INFO L158 Benchmark]: Boogie Preprocessor took 30.47ms. Allocated memory is still 188.7MB. Free memory was 118.8MB in the beginning and 117.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 15:53:31,088 INFO L158 Benchmark]: RCFGBuilder took 461.97ms. Allocated memory is still 188.7MB. Free memory was 117.3MB in the beginning and 100.0MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-25 15:53:31,089 INFO L158 Benchmark]: TraceAbstraction took 160942.73ms. Allocated memory was 188.7MB in the beginning and 650.1MB in the end (delta: 461.4MB). Free memory was 99.1MB in the beginning and 532.6MB in the end (delta: -433.5MB). Peak memory consumption was 29.8MB. Max. memory is 16.1GB. [2022-11-25 15:53:31,089 INFO L158 Benchmark]: Witness Printer took 67.07ms. Allocated memory is still 650.1MB. Free memory was 532.6MB in the beginning and 530.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 15:53:31,092 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 188.7MB. Free memory is still 158.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 517.70ms. Allocated memory is still 188.7MB. Free memory was 139.3MB in the beginning and 121.0MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.23ms. Allocated memory is still 188.7MB. Free memory was 121.0MB in the beginning and 118.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.47ms. Allocated memory is still 188.7MB. Free memory was 118.8MB in the beginning and 117.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 461.97ms. Allocated memory is still 188.7MB. Free memory was 117.3MB in the beginning and 100.0MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 160942.73ms. Allocated memory was 188.7MB in the beginning and 650.1MB in the end (delta: 461.4MB). Free memory was 99.1MB in the beginning and 532.6MB in the end (delta: -433.5MB). Peak memory consumption was 29.8MB. Max. memory is 16.1GB. * Witness Printer took 67.07ms. Allocated memory is still 650.1MB. Free memory was 532.6MB in the beginning and 530.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1050]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1005] SLL* null = malloc(sizeof(SLL)); [L1006] null->colour = BLACK [L1007] null->next = ((void*)0) [L1009] SLL* list = malloc(sizeof(SLL)); [L1010] list->next = null [L1011] list->colour = BLACK [L1013] SLL* end = list; VAL [end={-1:0}, list={-1:0}, null={-2:0}] [L1016] COND TRUE __VERIFIER_nondet_int() [L1019] end->next = malloc(sizeof(SLL)) [L1020] EXPR end->next [L1020] end = end->next [L1021] end->next = null [L1023] COND FALSE !(__VERIFIER_nondet_int()) [L1029] end->colour = RED [L1030] end->next = malloc(sizeof(SLL)) [L1031] EXPR end->next [L1031] end = end->next [L1032] end->next = null [L1033] end->colour = BLACK VAL [end={-4:0}, list={-1:0}, null={-2:0}] [L1016] COND FALSE !(__VERIFIER_nondet_int()) [L1037] end = null [L1038] end = list VAL [end={-1:0}, list={-1:0}, null={-2:0}] [L1041] COND FALSE !(!(null != end)) VAL [end={-1:0}, list={-1:0}, null={-2:0}] [L1042] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, null={-2:0}] [L1042] COND FALSE !(!(BLACK == end->colour)) [L1044] COND TRUE null != end [L1046] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, null={-2:0}] [L1046] COND FALSE !(RED == end->colour) [L1053] EXPR end->next [L1053] end = end->next [L1044] COND TRUE null != end [L1046] EXPR end->colour VAL [end={-3:0}, end->colour=0, list={-1:0}, null={-2:0}] [L1046] COND TRUE RED == end->colour [L1048] EXPR end->next [L1048] end = end->next [L1049] COND FALSE !(!(null != end)) VAL [end={-4:0}, list={-1:0}, null={-2:0}] [L1050] EXPR end->colour VAL [end={-4:0}, end->colour=1, list={-1:0}, null={-2:0}] [L1050] COND TRUE !(BLACK != end->colour) [L1050] reach_error() VAL [end={-4:0}, list={-1:0}, null={-2:0}] - UnprovableResult [Line: 1041]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 160.8s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 428 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 428 mSDsluCounter, 896 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 99 IncrementalHoareTripleChecker+Unchecked, 717 mSDsCounter, 71 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 909 IncrementalHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 71 mSolverCounterUnsat, 179 mSDtfsCounter, 909 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 216 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=8, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 91 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 155.3s InterpolantComputationTime, 200 NumberOfCodeBlocks, 200 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 231 ConstructedInterpolants, 22 QuantifiedInterpolants, 4756 SizeOfPredicates, 38 NumberOfNonLiveVariables, 773 ConjunctsInSsa, 146 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 3/36 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-25 15:53:31,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb5ace5-2596-456b-bdaa-efbaac663521/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE