./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/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_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d --- 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 17:53:28,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:53:28,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:53:28,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:53:28,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:53:28,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:53:28,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:53:28,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:53:28,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:53:28,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:53:28,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:53:28,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:53:28,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:53:28,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:53:28,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:53:28,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:53:28,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:53:28,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:53:28,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:53:28,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:53:28,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:53:28,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:53:28,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:53:28,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:53:28,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:53:28,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:53:28,510 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:53:28,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:53:28,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:53:28,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:53:28,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:53:28,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:53:28,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:53:28,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:53:28,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:53:28,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:53:28,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:53:28,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:53:28,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:53:28,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:53:28,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:53:28,524 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:53:28,549 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:53:28,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:53:28,550 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:53:28,550 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:53:28,551 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:53:28,551 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:53:28,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:53:28,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:53:28,553 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:53:28,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:53:28,553 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:53:28,554 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:53:28,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:53:28,554 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:53:28,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:53:28,555 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:53:28,555 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:53:28,555 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:53:28,555 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:53:28,556 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:53:28,556 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:53:28,556 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:53:28,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:53:28,557 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:53:28,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:53:28,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:53:28,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:53:28,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:53:28,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:53:28,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:53:28,558 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:53:28,558 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:53:28,559 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:53:28,559 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_2cc1deed-b8ca-4579-a55f-9113a2142a31/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d [2022-11-25 17:53:28,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:53:28,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:53:28,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:53:28,867 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:53:28,868 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:53:28,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2022-11-25 17:53:31,999 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:53:32,243 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:53:32,244 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2022-11-25 17:53:32,256 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/data/2a243796b/568ccb2da07e4f5a8c8b5e44d2ddbb83/FLAGd41c5130a [2022-11-25 17:53:32,271 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/data/2a243796b/568ccb2da07e4f5a8c8b5e44d2ddbb83 [2022-11-25 17:53:32,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:53:32,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:53:32,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:53:32,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:53:32,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:53:32,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:53:32" (1/1) ... [2022-11-25 17:53:32,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cbf9323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:32, skipping insertion in model container [2022-11-25 17:53:32,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:53:32" (1/1) ... [2022-11-25 17:53:32,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:53:32,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:53:32,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:53:32,650 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:53:32,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:53:32,715 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:53:32,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:32 WrapperNode [2022-11-25 17:53:32,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:53:32,717 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:53:32,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:53:32,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:53:32,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:32" (1/1) ... [2022-11-25 17:53:32,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:32" (1/1) ... [2022-11-25 17:53:32,762 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2022-11-25 17:53:32,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:53:32,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:53:32,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:53:32,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:53:32,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:32" (1/1) ... [2022-11-25 17:53:32,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:32" (1/1) ... [2022-11-25 17:53:32,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:32" (1/1) ... [2022-11-25 17:53:32,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:32" (1/1) ... [2022-11-25 17:53:32,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:32" (1/1) ... [2022-11-25 17:53:32,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:32" (1/1) ... [2022-11-25 17:53:32,788 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:32" (1/1) ... [2022-11-25 17:53:32,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:32" (1/1) ... [2022-11-25 17:53:32,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:53:32,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:53:32,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:53:32,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:53:32,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:32" (1/1) ... [2022-11-25 17:53:32,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:53:32,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:32,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:53:32,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:53:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:53:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:53:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:53:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:53:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:53:32,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:53:33,017 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:53:33,027 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:53:33,269 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:53:33,276 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:53:33,276 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 17:53:33,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:53:33 BoogieIcfgContainer [2022-11-25 17:53:33,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:53:33,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:53:33,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:53:33,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:53:33,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:53:32" (1/3) ... [2022-11-25 17:53:33,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e816c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:53:33, skipping insertion in model container [2022-11-25 17:53:33,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:32" (2/3) ... [2022-11-25 17:53:33,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e816c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:53:33, skipping insertion in model container [2022-11-25 17:53:33,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:53:33" (3/3) ... [2022-11-25 17:53:33,296 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca-2.i [2022-11-25 17:53:33,347 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:53:33,347 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-11-25 17:53:33,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:53:33,420 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67710dd1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:53:33,421 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-25 17:53:33,425 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 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 17:53:33,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 17:53:33,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:33,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:33,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:33,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:33,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-11-25 17:53:33,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:33,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233588807] [2022-11-25 17:53:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:33,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:33,750 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 17:53:33,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:33,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233588807] [2022-11-25 17:53:33,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233588807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:33,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:33,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:53:33,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820669930] [2022-11-25 17:53:33,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:33,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:53:33,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:33,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:53:33,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:53:33,793 INFO L87 Difference]: Start difference. First operand has 42 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 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 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 17:53:33,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:33,844 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-11-25 17:53:33,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:53:33,847 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 17:53:33,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:33,856 INFO L225 Difference]: With dead ends: 76 [2022-11-25 17:53:33,856 INFO L226 Difference]: Without dead ends: 72 [2022-11-25 17:53:33,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:53:33,861 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 69 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:33,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 84 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:53:33,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-25 17:53:33,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 43. [2022-11-25 17:53:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 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 17:53:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-11-25 17:53:33,957 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 7 [2022-11-25 17:53:33,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:33,957 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-11-25 17:53:33,958 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 17:53:33,958 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-11-25 17:53:33,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 17:53:33,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:33,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:33,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:53:33,959 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:33,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:33,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-11-25 17:53:33,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:33,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793165235] [2022-11-25 17:53:33,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:33,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:34,468 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 17:53:34,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:34,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793165235] [2022-11-25 17:53:34,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793165235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:34,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:34,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:53:34,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647440597] [2022-11-25 17:53:34,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:34,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:53:34,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:34,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:53:34,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:53:34,484 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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 17:53:34,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:34,607 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2022-11-25 17:53:34,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:53:34,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 17:53:34,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:34,609 INFO L225 Difference]: With dead ends: 77 [2022-11-25 17:53:34,609 INFO L226 Difference]: Without dead ends: 77 [2022-11-25 17:53:34,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:53:34,611 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:34,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 51 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:53:34,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-25 17:53:34,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2022-11-25 17:53:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-11-25 17:53:34,618 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 7 [2022-11-25 17:53:34,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:34,619 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-11-25 17:53:34,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 17:53:34,619 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-11-25 17:53:34,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 17:53:34,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:34,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:34,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:53:34,621 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:34,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:34,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-11-25 17:53:34,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:34,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533191487] [2022-11-25 17:53:34,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:34,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:34,851 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 17:53:34,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:34,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533191487] [2022-11-25 17:53:34,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533191487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:34,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:34,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:53:34,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945598360] [2022-11-25 17:53:34,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:34,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:53:34,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:34,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:53:34,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:53:34,855 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 17:53:34,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:34,985 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2022-11-25 17:53:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:53:34,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 17:53:34,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:34,987 INFO L225 Difference]: With dead ends: 73 [2022-11-25 17:53:34,987 INFO L226 Difference]: Without dead ends: 73 [2022-11-25 17:53:34,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:53:34,989 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 108 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:34,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 71 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:53:34,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-25 17:53:34,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2022-11-25 17:53:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.5625) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-11-25 17:53:34,995 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 7 [2022-11-25 17:53:34,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:34,996 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-11-25 17:53:34,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 17:53:34,996 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-11-25 17:53:34,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 17:53:34,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:34,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:34,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:53:34,997 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:34,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:34,998 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-11-25 17:53:34,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:34,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797947585] [2022-11-25 17:53:34,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:34,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:35,190 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 17:53:35,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:35,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797947585] [2022-11-25 17:53:35,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797947585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:35,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:35,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:53:35,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429220012] [2022-11-25 17:53:35,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:35,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:53:35,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:35,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:53:35,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:53:35,194 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 17:53:35,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:35,253 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2022-11-25 17:53:35,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:53:35,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-25 17:53:35,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:35,260 INFO L225 Difference]: With dead ends: 70 [2022-11-25 17:53:35,260 INFO L226 Difference]: Without dead ends: 70 [2022-11-25 17:53:35,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:53:35,270 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:35,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 68 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:53:35,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-25 17:53:35,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 49. [2022-11-25 17:53:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-11-25 17:53:35,277 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 9 [2022-11-25 17:53:35,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:35,277 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-11-25 17:53:35,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 17:53:35,278 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-11-25 17:53:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 17:53:35,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:35,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:35,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:53:35,279 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:35,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:35,280 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-11-25 17:53:35,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:35,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005626840] [2022-11-25 17:53:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:35,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:35,328 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 17:53:35,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:35,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005626840] [2022-11-25 17:53:35,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005626840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:35,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:35,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:53:35,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474939844] [2022-11-25 17:53:35,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:35,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:53:35,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:35,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:53:35,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:53:35,331 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 17:53:35,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:35,365 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-11-25 17:53:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:53:35,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-25 17:53:35,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:35,369 INFO L225 Difference]: With dead ends: 85 [2022-11-25 17:53:35,369 INFO L226 Difference]: Without dead ends: 85 [2022-11-25 17:53:35,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:53:35,374 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 51 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:35,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 80 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:53:35,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-25 17:53:35,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2022-11-25 17:53:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 61 states have internal predecessors, (75), 0 states have call successors, (0), 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 17:53:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-11-25 17:53:35,381 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 9 [2022-11-25 17:53:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:35,381 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-11-25 17:53:35,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 17:53:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-11-25 17:53:35,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 17:53:35,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:35,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:35,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:53:35,391 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:35,395 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-11-25 17:53:35,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:35,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325036358] [2022-11-25 17:53:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:35,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:35,512 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 17:53:35,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:35,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325036358] [2022-11-25 17:53:35,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325036358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:35,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:35,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:53:35,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297692974] [2022-11-25 17:53:35,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:35,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:53:35,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:35,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:53:35,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:53:35,515 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 17:53:35,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:35,543 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-11-25 17:53:35,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:53:35,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-25 17:53:35,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:35,545 INFO L225 Difference]: With dead ends: 60 [2022-11-25 17:53:35,545 INFO L226 Difference]: Without dead ends: 60 [2022-11-25 17:53:35,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:53:35,546 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:35,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:53:35,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-25 17:53:35,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-25 17:53:35,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.411764705882353) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:53:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-11-25 17:53:35,552 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 9 [2022-11-25 17:53:35,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:35,553 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-11-25 17:53:35,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 17:53:35,553 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-11-25 17:53:35,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 17:53:35,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:35,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:35,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:53:35,554 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:35,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:35,555 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-11-25 17:53:35,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:35,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399739630] [2022-11-25 17:53:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:35,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:35,712 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 17:53:35,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:35,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399739630] [2022-11-25 17:53:35,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399739630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:35,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:35,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:53:35,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311443833] [2022-11-25 17:53:35,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:35,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:53:35,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:35,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:53:35,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:53:35,715 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 17:53:35,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:35,871 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2022-11-25 17:53:35,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:53:35,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-25 17:53:35,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:35,873 INFO L225 Difference]: With dead ends: 89 [2022-11-25 17:53:35,873 INFO L226 Difference]: Without dead ends: 89 [2022-11-25 17:53:35,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:53:35,875 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 86 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:35,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 63 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:53:35,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-25 17:53:35,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2022-11-25 17:53:35,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 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 17:53:35,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-11-25 17:53:35,898 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 9 [2022-11-25 17:53:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:35,898 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-11-25 17:53:35,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 17:53:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-11-25 17:53:35,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 17:53:35,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:35,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:35,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:53:35,900 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:35,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:35,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2022-11-25 17:53:35,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:35,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628195921] [2022-11-25 17:53:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:35,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:36,197 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 17:53:36,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:36,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628195921] [2022-11-25 17:53:36,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628195921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:36,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:36,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:53:36,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845271978] [2022-11-25 17:53:36,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:36,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:53:36,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:36,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:53:36,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:53:36,202 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 17:53:36,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:36,309 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2022-11-25 17:53:36,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:53:36,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-25 17:53:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:36,310 INFO L225 Difference]: With dead ends: 97 [2022-11-25 17:53:36,310 INFO L226 Difference]: Without dead ends: 97 [2022-11-25 17:53:36,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:53:36,313 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 67 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:36,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 67 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:53:36,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-25 17:53:36,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 64. [2022-11-25 17:53:36,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 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 17:53:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-11-25 17:53:36,332 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 9 [2022-11-25 17:53:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:36,332 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-11-25 17:53:36,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 17:53:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-11-25 17:53:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 17:53:36,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:36,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:36,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:53:36,334 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:36,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:36,335 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-11-25 17:53:36,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:36,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61039149] [2022-11-25 17:53:36,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:36,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:36,663 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 17:53:36,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:36,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61039149] [2022-11-25 17:53:36,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61039149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:36,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:36,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:53:36,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740236785] [2022-11-25 17:53:36,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:36,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:53:36,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:36,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:53:36,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:53:36,665 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 17:53:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:36,724 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2022-11-25 17:53:36,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:53:36,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 17:53:36,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:36,725 INFO L225 Difference]: With dead ends: 85 [2022-11-25 17:53:36,725 INFO L226 Difference]: Without dead ends: 85 [2022-11-25 17:53:36,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:53:36,726 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:36,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:53:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-25 17:53:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2022-11-25 17:53:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 66 states have internal predecessors, (82), 0 states have call successors, (0), 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 17:53:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2022-11-25 17:53:36,730 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 10 [2022-11-25 17:53:36,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:36,730 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2022-11-25 17:53:36,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 17:53:36,730 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2022-11-25 17:53:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 17:53:36,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:36,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:36,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:53:36,731 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:36,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:36,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1890276516, now seen corresponding path program 1 times [2022-11-25 17:53:36,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:36,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16001078] [2022-11-25 17:53:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:36,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:36,838 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 17:53:36,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:36,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16001078] [2022-11-25 17:53:36,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16001078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:36,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:36,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:53:36,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498118057] [2022-11-25 17:53:36,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:36,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:53:36,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:36,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:53:36,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:53:36,841 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 5 states, 4 states have (on average 2.5) 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 17:53:36,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:36,877 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2022-11-25 17:53:36,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:53:36,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) 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 17:53:36,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:36,878 INFO L225 Difference]: With dead ends: 66 [2022-11-25 17:53:36,878 INFO L226 Difference]: Without dead ends: 66 [2022-11-25 17:53:36,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:53:36,879 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 59 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:36,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 27 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:53:36,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-25 17:53:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2022-11-25 17:53:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.4) internal successors, (77), 62 states have internal predecessors, (77), 0 states have call successors, (0), 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 17:53:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-11-25 17:53:36,883 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 10 [2022-11-25 17:53:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:36,883 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-11-25 17:53:36,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) 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 17:53:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-11-25 17:53:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 17:53:36,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:36,884 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:36,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:53:36,885 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:36,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:36,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-11-25 17:53:36,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:36,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445642849] [2022-11-25 17:53:36,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:36,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:37,156 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 17:53:37,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:37,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445642849] [2022-11-25 17:53:37,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445642849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:37,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301796186] [2022-11-25 17:53:37,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:37,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:37,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:37,161 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:37,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:53:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:37,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:53:37,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:37,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:37,332 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 9 treesize of output 11 [2022-11-25 17:53:37,344 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 10 treesize of output 8 [2022-11-25 17:53:37,471 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 17:53:37,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:37,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:53:37,620 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 17:53:37,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301796186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:37,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:37,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-11-25 17:53:37,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453481336] [2022-11-25 17:53:37,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:37,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:53:37,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:37,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:53:37,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:53:37,623 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 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 17:53:37,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:37,964 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2022-11-25 17:53:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:53:37,965 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 17:53:37,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:37,965 INFO L225 Difference]: With dead ends: 84 [2022-11-25 17:53:37,966 INFO L226 Difference]: Without dead ends: 84 [2022-11-25 17:53:37,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:53:37,967 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 171 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:37,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 192 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:53:37,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-25 17:53:37,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2022-11-25 17:53:37,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 59 states have internal predecessors, (73), 0 states have call successors, (0), 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 17:53:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2022-11-25 17:53:37,970 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 11 [2022-11-25 17:53:37,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:37,970 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2022-11-25 17:53:37,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 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 17:53:37,970 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2022-11-25 17:53:37,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 17:53:37,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:37,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:37,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:38,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:38,175 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:38,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:38,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446013, now seen corresponding path program 1 times [2022-11-25 17:53:38,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:38,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983236552] [2022-11-25 17:53:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:38,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:38,270 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 17:53:38,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:38,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983236552] [2022-11-25 17:53:38,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983236552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:38,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:38,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:53:38,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632835737] [2022-11-25 17:53:38,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:38,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:53:38,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:38,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:53:38,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:53:38,272 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 17:53:38,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:38,332 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2022-11-25 17:53:38,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:53:38,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 17:53:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:38,333 INFO L225 Difference]: With dead ends: 59 [2022-11-25 17:53:38,333 INFO L226 Difference]: Without dead ends: 59 [2022-11-25 17:53:38,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 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 17:53:38,335 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:38,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 65 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:53:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-25 17:53:38,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-25 17:53:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 58 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:53:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2022-11-25 17:53:38,338 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 13 [2022-11-25 17:53:38,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:38,338 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2022-11-25 17:53:38,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 17:53:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2022-11-25 17:53:38,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 17:53:38,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:38,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:38,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:53:38,340 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:38,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:38,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446012, now seen corresponding path program 1 times [2022-11-25 17:53:38,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:38,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119566610] [2022-11-25 17:53:38,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:38,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:38,497 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 17:53:38,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:38,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119566610] [2022-11-25 17:53:38,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119566610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:38,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:38,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:53:38,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119490086] [2022-11-25 17:53:38,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:38,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:53:38,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:38,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:53:38,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:53:38,500 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 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 17:53:38,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:38,630 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-11-25 17:53:38,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:53:38,635 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 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 17:53:38,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:38,635 INFO L225 Difference]: With dead ends: 65 [2022-11-25 17:53:38,636 INFO L226 Difference]: Without dead ends: 65 [2022-11-25 17:53:38,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:53:38,637 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 95 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:38,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 97 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:53:38,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-25 17:53:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2022-11-25 17:53:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 60 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2022-11-25 17:53:38,640 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 13 [2022-11-25 17:53:38,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:38,641 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2022-11-25 17:53:38,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 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 17:53:38,641 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2022-11-25 17:53:38,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 17:53:38,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:38,645 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:38,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 17:53:38,645 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:38,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:38,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-11-25 17:53:38,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:38,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058558613] [2022-11-25 17:53:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:38,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:38,946 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 17:53:38,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:38,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058558613] [2022-11-25 17:53:38,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058558613] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:38,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014225266] [2022-11-25 17:53:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:38,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:38,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:38,948 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:38,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:53:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:39,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:53:39,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:39,068 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-25 17:53:39,069 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 11 treesize of output 17 [2022-11-25 17:53:39,328 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 17:53:39,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:39,644 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 17:53:39,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014225266] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:39,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:39,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-25 17:53:39,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119968449] [2022-11-25 17:53:39,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:39,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:53:39,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:39,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:53:39,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:53:39,650 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:40,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:40,005 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2022-11-25 17:53:40,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:53:40,007 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 17:53:40,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:40,008 INFO L225 Difference]: With dead ends: 108 [2022-11-25 17:53:40,008 INFO L226 Difference]: Without dead ends: 108 [2022-11-25 17:53:40,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:53:40,009 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 289 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:40,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 146 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:53:40,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-25 17:53:40,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 56. [2022-11-25 17:53:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:40,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-11-25 17:53:40,011 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 13 [2022-11-25 17:53:40,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:40,012 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-11-25 17:53:40,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:40,012 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-11-25 17:53:40,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 17:53:40,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:40,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:40,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:40,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:40,221 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:40,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:40,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1389200859, now seen corresponding path program 1 times [2022-11-25 17:53:40,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:40,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881304398] [2022-11-25 17:53:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:40,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:40,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:40,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881304398] [2022-11-25 17:53:40,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881304398] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:40,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759955680] [2022-11-25 17:53:40,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:40,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:40,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:40,546 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:40,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:53:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:40,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:53:40,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:40,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:40,657 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 11 treesize of output 13 [2022-11-25 17:53:40,667 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 10 treesize of output 8 [2022-11-25 17:53:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:40,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:40,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:53:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:40,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759955680] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:40,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:53:40,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2022-11-25 17:53:40,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72875305] [2022-11-25 17:53:40,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:40,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:53:40,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:40,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:53:40,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:53:40,997 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 17:53:41,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:41,124 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-11-25 17:53:41,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:53:41,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 17:53:41,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:41,125 INFO L225 Difference]: With dead ends: 57 [2022-11-25 17:53:41,126 INFO L226 Difference]: Without dead ends: 57 [2022-11-25 17:53:41,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:53:41,126 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 81 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:41,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 39 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:53:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-25 17:53:41,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2022-11-25 17:53:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 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 17:53:41,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-11-25 17:53:41,129 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 13 [2022-11-25 17:53:41,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:41,129 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-11-25 17:53:41,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 17:53:41,129 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-11-25 17:53:41,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 17:53:41,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:41,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:41,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:41,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:53:41,337 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:41,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:41,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1429572955, now seen corresponding path program 1 times [2022-11-25 17:53:41,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:41,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211251] [2022-11-25 17:53:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:41,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:41,403 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 17:53:41,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:41,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211251] [2022-11-25 17:53:41,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:41,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:41,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:53:41,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413431992] [2022-11-25 17:53:41,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:41,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:53:41,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:41,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:53:41,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:53:41,406 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 17:53:41,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:41,472 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-11-25 17:53:41,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:53:41,473 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-11-25 17:53:41,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:41,473 INFO L225 Difference]: With dead ends: 45 [2022-11-25 17:53:41,473 INFO L226 Difference]: Without dead ends: 45 [2022-11-25 17:53:41,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:53:41,475 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 48 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:41,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 74 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:53:41,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-25 17:53:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-11-25 17:53:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-11-25 17:53:41,478 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 16 [2022-11-25 17:53:41,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:41,478 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-11-25 17:53:41,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 17:53:41,479 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-11-25 17:53:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 17:53:41,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:41,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:41,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 17:53:41,481 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:41,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:41,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1429572954, now seen corresponding path program 1 times [2022-11-25 17:53:41,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:41,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268177001] [2022-11-25 17:53:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:41,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:41,672 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 17:53:41,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:41,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268177001] [2022-11-25 17:53:41,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268177001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:41,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:41,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:53:41,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111729039] [2022-11-25 17:53:41,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:41,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:53:41,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:41,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:53:41,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:53:41,675 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 17:53:41,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:41,797 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-11-25 17:53:41,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:53:41,798 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-11-25 17:53:41,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:41,798 INFO L225 Difference]: With dead ends: 52 [2022-11-25 17:53:41,799 INFO L226 Difference]: Without dead ends: 52 [2022-11-25 17:53:41,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:53:41,799 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 102 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:41,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 89 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:53:41,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-25 17:53:41,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-11-25 17:53:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 45 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 17:53:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-11-25 17:53:41,802 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 16 [2022-11-25 17:53:41,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:41,802 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-11-25 17:53:41,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 17:53:41,803 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-11-25 17:53:41,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 17:53:41,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:41,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:41,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 17:53:41,804 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:41,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:41,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2056472215, now seen corresponding path program 1 times [2022-11-25 17:53:41,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:41,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490255899] [2022-11-25 17:53:41,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:41,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:42,039 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 17:53:42,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:42,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490255899] [2022-11-25 17:53:42,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490255899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:42,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:42,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:53:42,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885848076] [2022-11-25 17:53:42,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:42,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:53:42,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:42,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:53:42,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:53:42,042 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:42,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:42,064 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-11-25 17:53:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:53:42,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-25 17:53:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:42,067 INFO L225 Difference]: With dead ends: 45 [2022-11-25 17:53:42,067 INFO L226 Difference]: Without dead ends: 43 [2022-11-25 17:53:42,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:53:42,068 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 50 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 17:53:42,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 50 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:53:42,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-25 17:53:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-25 17:53:42,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:42,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-11-25 17:53:42,073 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 20 [2022-11-25 17:53:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:42,074 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-11-25 17:53:42,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:42,075 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-11-25 17:53:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 17:53:42,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:42,076 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:42,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 17:53:42,076 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:42,077 INFO L85 PathProgramCache]: Analyzing trace with hash 673920784, now seen corresponding path program 1 times [2022-11-25 17:53:42,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:42,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786135285] [2022-11-25 17:53:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:42,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:42,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:42,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786135285] [2022-11-25 17:53:42,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786135285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:42,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:42,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 17:53:42,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304945669] [2022-11-25 17:53:42,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:42,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:53:42,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:42,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:53:42,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:53:42,383 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:42,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:42,574 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2022-11-25 17:53:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:53:42,575 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-25 17:53:42,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:42,576 INFO L225 Difference]: With dead ends: 66 [2022-11-25 17:53:42,576 INFO L226 Difference]: Without dead ends: 66 [2022-11-25 17:53:42,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:53:42,577 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:42,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 203 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:53:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-25 17:53:42,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2022-11-25 17:53:42,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.180327868852459) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 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 17:53:42,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2022-11-25 17:53:42,579 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 21 [2022-11-25 17:53:42,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:42,579 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2022-11-25 17:53:42,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:42,580 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2022-11-25 17:53:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 17:53:42,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:42,580 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:42,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 17:53:42,581 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:42,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:42,581 INFO L85 PathProgramCache]: Analyzing trace with hash 673922962, now seen corresponding path program 1 times [2022-11-25 17:53:42,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:42,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978435209] [2022-11-25 17:53:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:42,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:42,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:42,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978435209] [2022-11-25 17:53:42,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978435209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:42,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:42,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 17:53:42,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695735837] [2022-11-25 17:53:42,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:42,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:53:42,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:42,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:53:42,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:53:42,868 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:43,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:43,129 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-11-25 17:53:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:53:43,130 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-25 17:53:43,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:43,130 INFO L225 Difference]: With dead ends: 96 [2022-11-25 17:53:43,130 INFO L226 Difference]: Without dead ends: 81 [2022-11-25 17:53:43,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:53:43,131 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:43,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 184 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:53:43,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-25 17:53:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2022-11-25 17:53:43,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 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 17:53:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2022-11-25 17:53:43,134 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 21 [2022-11-25 17:53:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:43,135 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2022-11-25 17:53:43,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2022-11-25 17:53:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 17:53:43,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:43,136 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:43,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 17:53:43,136 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:43,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:43,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1320221744, now seen corresponding path program 1 times [2022-11-25 17:53:43,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:43,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867137283] [2022-11-25 17:53:43,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:43,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:43,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:43,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867137283] [2022-11-25 17:53:43,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867137283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:43,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:43,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 17:53:43,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626247434] [2022-11-25 17:53:43,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:43,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:53:43,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:43,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:53:43,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:53:43,431 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:43,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:43,703 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2022-11-25 17:53:43,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:53:43,703 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-25 17:53:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:43,704 INFO L225 Difference]: With dead ends: 117 [2022-11-25 17:53:43,704 INFO L226 Difference]: Without dead ends: 106 [2022-11-25 17:53:43,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:53:43,705 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 106 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:43,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 168 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:53:43,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-25 17:53:43,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 74. [2022-11-25 17:53:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 73 states have internal predecessors, (84), 0 states have call successors, (0), 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 17:53:43,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2022-11-25 17:53:43,707 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 21 [2022-11-25 17:53:43,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:43,707 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2022-11-25 17:53:43,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2022-11-25 17:53:43,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 17:53:43,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:43,709 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:43,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 17:53:43,709 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:43,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:43,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1015022958, now seen corresponding path program 1 times [2022-11-25 17:53:43,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:43,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819737681] [2022-11-25 17:53:43,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:43,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:44,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:44,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819737681] [2022-11-25 17:53:44,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819737681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:44,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:44,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-25 17:53:44,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882406556] [2022-11-25 17:53:44,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:44,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:53:44,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:44,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:53:44,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:53:44,205 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:45,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:45,110 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2022-11-25 17:53:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:53:45,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-25 17:53:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:45,114 INFO L225 Difference]: With dead ends: 118 [2022-11-25 17:53:45,114 INFO L226 Difference]: Without dead ends: 105 [2022-11-25 17:53:45,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-11-25 17:53:45,115 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 116 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:45,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 200 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:53:45,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-25 17:53:45,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 76. [2022-11-25 17:53:45,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 75 states have internal predecessors, (87), 0 states have call successors, (0), 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 17:53:45,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2022-11-25 17:53:45,118 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 21 [2022-11-25 17:53:45,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:45,118 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2022-11-25 17:53:45,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:45,118 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2022-11-25 17:53:45,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 17:53:45,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:45,119 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:45,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 17:53:45,119 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:45,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:45,120 INFO L85 PathProgramCache]: Analyzing trace with hash -359665389, now seen corresponding path program 1 times [2022-11-25 17:53:45,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:45,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625660368] [2022-11-25 17:53:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:45,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:45,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:45,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625660368] [2022-11-25 17:53:45,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625660368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:45,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066816565] [2022-11-25 17:53:45,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:45,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:45,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:45,403 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:45,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:53:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:45,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 17:53:45,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:45,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:45,850 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 17:53:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:45,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066816565] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:45,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:45,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-11-25 17:53:45,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428501371] [2022-11-25 17:53:45,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:45,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:53:45,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:45,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:53:45,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:53:45,886 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 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 17:53:46,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:46,354 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2022-11-25 17:53:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:53:46,355 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 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 25 [2022-11-25 17:53:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:46,356 INFO L225 Difference]: With dead ends: 101 [2022-11-25 17:53:46,356 INFO L226 Difference]: Without dead ends: 101 [2022-11-25 17:53:46,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 17:53:46,357 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 264 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:46,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 271 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:53:46,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-25 17:53:46,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2022-11-25 17:53:46,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 1.1666666666666667) internal successors, (98), 85 states have internal predecessors, (98), 0 states have call successors, (0), 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 17:53:46,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2022-11-25 17:53:46,360 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 25 [2022-11-25 17:53:46,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:46,360 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2022-11-25 17:53:46,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 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 17:53:46,360 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2022-11-25 17:53:46,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 17:53:46,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:46,361 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:46,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:46,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 17:53:46,561 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:46,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:46,562 INFO L85 PathProgramCache]: Analyzing trace with hash 501654165, now seen corresponding path program 1 times [2022-11-25 17:53:46,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:46,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427034862] [2022-11-25 17:53:46,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:46,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:46,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:46,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427034862] [2022-11-25 17:53:46,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427034862] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:46,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44805821] [2022-11-25 17:53:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:46,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:46,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:46,811 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:46,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:53:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:46,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 17:53:46,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:47,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:47,219 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 17:53:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:47,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44805821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:47,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:47,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-11-25 17:53:47,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414644759] [2022-11-25 17:53:47,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:47,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:53:47,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:47,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:53:47,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:53:47,255 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:47,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:47,630 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2022-11-25 17:53:47,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:53:47,630 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-25 17:53:47,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:47,631 INFO L225 Difference]: With dead ends: 119 [2022-11-25 17:53:47,631 INFO L226 Difference]: Without dead ends: 119 [2022-11-25 17:53:47,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2022-11-25 17:53:47,632 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 181 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:47,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 321 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:53:47,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-25 17:53:47,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-11-25 17:53:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.158878504672897) internal successors, (124), 108 states have internal predecessors, (124), 0 states have call successors, (0), 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 17:53:47,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2022-11-25 17:53:47,635 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 25 [2022-11-25 17:53:47,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:47,636 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2022-11-25 17:53:47,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:47,636 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2022-11-25 17:53:47,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 17:53:47,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:47,637 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:47,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:47,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 17:53:47,839 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:47,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:47,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1205551803, now seen corresponding path program 2 times [2022-11-25 17:53:47,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:47,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75543447] [2022-11-25 17:53:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:47,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:48,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:48,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75543447] [2022-11-25 17:53:48,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75543447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:48,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839985045] [2022-11-25 17:53:48,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:53:48,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:48,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:48,324 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:48,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:53:48,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:53:48,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:53:48,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 17:53:48,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:48,501 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 14 treesize of output 10 [2022-11-25 17:53:49,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:49,041 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 20 treesize of output 17 [2022-11-25 17:53:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:49,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:49,962 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 13 [2022-11-25 17:53:49,967 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 16 treesize of output 12 [2022-11-25 17:53:49,974 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 24 treesize of output 20 [2022-11-25 17:53:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:50,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839985045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:50,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:50,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2022-11-25 17:53:50,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768044236] [2022-11-25 17:53:50,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:50,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 17:53:50,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:50,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 17:53:50,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 17:53:50,015 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 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 17:53:54,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:54,309 INFO L93 Difference]: Finished difference Result 205 states and 224 transitions. [2022-11-25 17:53:54,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 17:53:54,310 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-25 17:53:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:54,311 INFO L225 Difference]: With dead ends: 205 [2022-11-25 17:53:54,311 INFO L226 Difference]: Without dead ends: 189 [2022-11-25 17:53:54,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=935, Invalid=4765, Unknown=0, NotChecked=0, Total=5700 [2022-11-25 17:53:54,314 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 410 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:54,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 587 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 17:53:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-25 17:53:54,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 163. [2022-11-25 17:53:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 161 states have (on average 1.1428571428571428) internal successors, (184), 162 states have internal predecessors, (184), 0 states have call successors, (0), 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 17:53:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 184 transitions. [2022-11-25 17:53:54,321 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 184 transitions. Word has length 30 [2022-11-25 17:53:54,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:54,321 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 184 transitions. [2022-11-25 17:53:54,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 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 17:53:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 184 transitions. [2022-11-25 17:53:54,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 17:53:54,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:54,323 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:54,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:54,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 17:53:54,530 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:53:54,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:54,530 INFO L85 PathProgramCache]: Analyzing trace with hash -512582047, now seen corresponding path program 2 times [2022-11-25 17:53:54,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:54,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670443164] [2022-11-25 17:53:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:54,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:55,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:55,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670443164] [2022-11-25 17:53:55,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670443164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:55,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440773304] [2022-11-25 17:53:55,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:53:55,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:55,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:55,311 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:55,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:53:55,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:53:55,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:53:55,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 17:53:55,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:55,468 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 10 treesize of output 8 [2022-11-25 17:53:55,666 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 14 treesize of output 10 [2022-11-25 17:53:55,744 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 17 treesize of output 19 [2022-11-25 17:53:56,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:53:56,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:56,356 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 18 treesize of output 10 [2022-11-25 17:53:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:56,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:56,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:56,941 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 23 treesize of output 24 [2022-11-25 17:53:56,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:56,951 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 37 treesize of output 36 [2022-11-25 17:53:56,957 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 17:53:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:57,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440773304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:57,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:57,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 43 [2022-11-25 17:53:57,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309745374] [2022-11-25 17:53:57,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:57,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 17:53:57,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:57,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 17:53:57,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1670, Unknown=2, NotChecked=0, Total=1806 [2022-11-25 17:53:57,416 INFO L87 Difference]: Start difference. First operand 163 states and 184 transitions. Second operand has 43 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 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 17:53:59,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:53:59,960 INFO L93 Difference]: Finished difference Result 296 states and 321 transitions. [2022-11-25 17:53:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 17:53:59,961 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-25 17:53:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:53:59,962 INFO L225 Difference]: With dead ends: 296 [2022-11-25 17:53:59,962 INFO L226 Difference]: Without dead ends: 233 [2022-11-25 17:53:59,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=697, Invalid=4131, Unknown=2, NotChecked=0, Total=4830 [2022-11-25 17:53:59,964 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 337 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:53:59,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 865 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 17:53:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-25 17:53:59,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 204. [2022-11-25 17:53:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 202 states have (on average 1.1386138613861385) internal successors, (230), 203 states have internal predecessors, (230), 0 states have call successors, (0), 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 17:53:59,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 230 transitions. [2022-11-25 17:53:59,970 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 230 transitions. Word has length 33 [2022-11-25 17:53:59,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:53:59,970 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 230 transitions. [2022-11-25 17:53:59,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 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 17:53:59,971 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 230 transitions. [2022-11-25 17:53:59,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 17:53:59,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:53:59,971 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:59,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:00,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:00,179 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:54:00,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:00,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1700374044, now seen corresponding path program 3 times [2022-11-25 17:54:00,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:00,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140094210] [2022-11-25 17:54:00,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:00,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:00,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:00,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140094210] [2022-11-25 17:54:00,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140094210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:54:00,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183394456] [2022-11-25 17:54:00,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:54:00,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:00,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:54:00,493 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:54:00,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:54:00,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:54:00,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:54:00,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 17:54:00,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:00,630 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:54:00,630 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 17:54:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:00,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:54:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:01,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183394456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:54:01,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:54:01,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-11-25 17:54:01,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724551879] [2022-11-25 17:54:01,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:54:01,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:54:01,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:01,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:54:01,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:54:01,312 INFO L87 Difference]: Start difference. First operand 204 states and 230 transitions. Second operand has 24 states, 23 states have (on average 3.782608695652174) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 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 17:54:01,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:54:01,750 INFO L93 Difference]: Finished difference Result 272 states and 300 transitions. [2022-11-25 17:54:01,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:54:01,751 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.782608695652174) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 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 37 [2022-11-25 17:54:01,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:54:01,756 INFO L225 Difference]: With dead ends: 272 [2022-11-25 17:54:01,756 INFO L226 Difference]: Without dead ends: 272 [2022-11-25 17:54:01,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 17:54:01,758 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 215 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:54:01,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 360 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:54:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-25 17:54:01,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 245. [2022-11-25 17:54:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 243 states have (on average 1.1358024691358024) internal successors, (276), 244 states have internal predecessors, (276), 0 states have call successors, (0), 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 17:54:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 276 transitions. [2022-11-25 17:54:01,776 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 276 transitions. Word has length 37 [2022-11-25 17:54:01,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:54:01,776 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 276 transitions. [2022-11-25 17:54:01,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.782608695652174) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 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 17:54:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 276 transitions. [2022-11-25 17:54:01,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 17:54:01,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:54:01,778 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:54:01,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:01,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:01,987 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:54:01,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:01,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1745665110, now seen corresponding path program 3 times [2022-11-25 17:54:01,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:01,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414285363] [2022-11-25 17:54:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:01,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:02,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:02,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414285363] [2022-11-25 17:54:02,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414285363] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:54:02,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929989525] [2022-11-25 17:54:02,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:54:02,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:02,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:54:02,423 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:54:02,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:54:02,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:54:02,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:54:02,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 17:54:02,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:02,623 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 14 treesize of output 10 [2022-11-25 17:54:03,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:03,151 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 20 treesize of output 17 [2022-11-25 17:54:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:03,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:54:04,254 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 13 treesize of output 11 [2022-11-25 17:54:04,261 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 22 treesize of output 20 [2022-11-25 17:54:04,266 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 39 treesize of output 31 [2022-11-25 17:54:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:04,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929989525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:54:04,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:54:04,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 40 [2022-11-25 17:54:04,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974822417] [2022-11-25 17:54:04,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:54:04,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-25 17:54:04,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:04,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-25 17:54:04,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1438, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 17:54:04,336 INFO L87 Difference]: Start difference. First operand 245 states and 276 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 states have internal predecessors, (96), 0 states have call successors, (0), 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 17:54:20,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:54:20,951 INFO L93 Difference]: Finished difference Result 471 states and 513 transitions. [2022-11-25 17:54:20,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-25 17:54:20,951 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 states have internal predecessors, (96), 0 states have call successors, (0), 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 39 [2022-11-25 17:54:20,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:54:20,954 INFO L225 Difference]: With dead ends: 471 [2022-11-25 17:54:20,954 INFO L226 Difference]: Without dead ends: 420 [2022-11-25 17:54:20,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=1226, Invalid=6255, Unknown=1, NotChecked=0, Total=7482 [2022-11-25 17:54:20,957 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 846 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:54:20,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 977 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 17:54:20,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-11-25 17:54:20,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 341. [2022-11-25 17:54:20,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 339 states have (on average 1.1327433628318584) internal successors, (384), 340 states have internal predecessors, (384), 0 states have call successors, (0), 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 17:54:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 384 transitions. [2022-11-25 17:54:20,968 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 384 transitions. Word has length 39 [2022-11-25 17:54:20,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:54:20,968 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 384 transitions. [2022-11-25 17:54:20,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 states have internal predecessors, (96), 0 states have call successors, (0), 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 17:54:20,968 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 384 transitions. [2022-11-25 17:54:20,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 17:54:20,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:54:20,969 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:54:20,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:21,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:21,175 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:54:21,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:21,176 INFO L85 PathProgramCache]: Analyzing trace with hash -609642832, now seen corresponding path program 4 times [2022-11-25 17:54:21,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:21,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718619439] [2022-11-25 17:54:21,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:21,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:21,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:21,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718619439] [2022-11-25 17:54:21,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718619439] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:54:21,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689469960] [2022-11-25 17:54:21,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:54:21,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:21,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:54:21,815 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:54:21,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:54:21,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:54:21,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:54:21,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-25 17:54:21,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:21,989 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 14 treesize of output 10 [2022-11-25 17:54:22,054 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-25 17:54:22,054 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 25 treesize of output 24 [2022-11-25 17:54:23,551 INFO L321 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-11-25 17:54:23,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2022-11-25 17:54:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:54:23,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:54:25,955 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 44 treesize of output 38 [2022-11-25 17:54:25,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2022-11-25 17:54:25,982 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 27 [2022-11-25 17:54:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:54:26,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689469960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:54:26,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:54:26,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 53 [2022-11-25 17:54:26,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166659092] [2022-11-25 17:54:26,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:54:26,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-25 17:54:26,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:26,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-25 17:54:26,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2520, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 17:54:26,046 INFO L87 Difference]: Start difference. First operand 341 states and 384 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 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 17:54:39,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:54:39,726 INFO L93 Difference]: Finished difference Result 611 states and 664 transitions. [2022-11-25 17:54:39,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-25 17:54:39,727 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 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 45 [2022-11-25 17:54:39,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:54:39,729 INFO L225 Difference]: With dead ends: 611 [2022-11-25 17:54:39,729 INFO L226 Difference]: Without dead ends: 329 [2022-11-25 17:54:39,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2692 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=1614, Invalid=11958, Unknown=0, NotChecked=0, Total=13572 [2022-11-25 17:54:39,732 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 389 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:54:39,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 1287 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2176 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-25 17:54:39,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-25 17:54:39,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 198. [2022-11-25 17:54:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.1269035532994924) internal successors, (222), 197 states have internal predecessors, (222), 0 states have call successors, (0), 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 17:54:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 222 transitions. [2022-11-25 17:54:39,749 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 222 transitions. Word has length 45 [2022-11-25 17:54:39,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:54:39,749 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 222 transitions. [2022-11-25 17:54:39,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 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 17:54:39,749 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 222 transitions. [2022-11-25 17:54:39,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 17:54:39,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:54:39,750 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:54:39,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:39,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 17:54:39,956 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:54:39,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:39,956 INFO L85 PathProgramCache]: Analyzing trace with hash -424649921, now seen corresponding path program 4 times [2022-11-25 17:54:39,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:39,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945606766] [2022-11-25 17:54:39,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:39,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:40,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:40,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945606766] [2022-11-25 17:54:40,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945606766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:54:40,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347163708] [2022-11-25 17:54:40,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:54:40,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:40,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:54:40,555 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:54:40,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:54:40,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:54:40,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:54:40,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-25 17:54:40,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:40,858 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 14 treesize of output 10 [2022-11-25 17:54:47,818 INFO L321 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-11-25 17:54:47,819 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 34 [2022-11-25 17:54:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 27 refuted. 9 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:47,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:54:48,836 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 59 treesize of output 51 [2022-11-25 17:54:48,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:48,842 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 59 treesize of output 45 [2022-11-25 17:54:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:49,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347163708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:54:49,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:54:49,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26, 26] total 59 [2022-11-25 17:54:49,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708609045] [2022-11-25 17:54:49,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:54:49,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-25 17:54:49,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:49,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-25 17:54:49,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=3110, Unknown=8, NotChecked=0, Total=3422 [2022-11-25 17:54:49,229 INFO L87 Difference]: Start difference. First operand 198 states and 222 transitions. Second operand has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 59 states have internal predecessors, (122), 0 states have call successors, (0), 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 17:54:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:54:53,303 INFO L93 Difference]: Finished difference Result 389 states and 425 transitions. [2022-11-25 17:54:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-25 17:54:53,304 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 59 states have internal predecessors, (122), 0 states have call successors, (0), 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 48 [2022-11-25 17:54:53,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:54:53,305 INFO L225 Difference]: With dead ends: 389 [2022-11-25 17:54:53,305 INFO L226 Difference]: Without dead ends: 238 [2022-11-25 17:54:53,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1418, Invalid=7504, Unknown=8, NotChecked=0, Total=8930 [2022-11-25 17:54:53,309 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 343 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:54:53,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 500 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 17:54:53,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-25 17:54:53,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 214. [2022-11-25 17:54:53,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.1173708920187793) internal successors, (238), 213 states have internal predecessors, (238), 0 states have call successors, (0), 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 17:54:53,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 238 transitions. [2022-11-25 17:54:53,317 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 238 transitions. Word has length 48 [2022-11-25 17:54:53,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:54:53,318 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 238 transitions. [2022-11-25 17:54:53,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 59 states have internal predecessors, (122), 0 states have call successors, (0), 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 17:54:53,318 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 238 transitions. [2022-11-25 17:54:53,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 17:54:53,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:54:53,319 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:54:53,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:53,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:53,525 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:54:53,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:53,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1878539292, now seen corresponding path program 5 times [2022-11-25 17:54:53,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:53,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683212078] [2022-11-25 17:54:53,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:53,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:54,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:54,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683212078] [2022-11-25 17:54:54,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683212078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:54:54,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113248444] [2022-11-25 17:54:54,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:54:54,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:54,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:54:54,149 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:54:54,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:54:54,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-25 17:54:54,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:54:54,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-25 17:54:54,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:54,291 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:54:54,291 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 17:54:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:54,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:54:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:55,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113248444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:54:55,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:54:55,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 39 [2022-11-25 17:54:55,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927724817] [2022-11-25 17:54:55,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:54:55,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-25 17:54:55,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:55,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-25 17:54:55,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1354, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 17:54:55,348 INFO L87 Difference]: Start difference. First operand 214 states and 238 transitions. Second operand has 40 states, 39 states have (on average 3.282051282051282) internal successors, (128), 40 states have internal predecessors, (128), 0 states have call successors, (0), 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 17:54:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:54:56,264 INFO L93 Difference]: Finished difference Result 278 states and 305 transitions. [2022-11-25 17:54:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:54:56,265 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.282051282051282) internal successors, (128), 40 states have internal predecessors, (128), 0 states have call successors, (0), 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 52 [2022-11-25 17:54:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:54:56,266 INFO L225 Difference]: With dead ends: 278 [2022-11-25 17:54:56,267 INFO L226 Difference]: Without dead ends: 278 [2022-11-25 17:54:56,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=635, Invalid=2227, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 17:54:56,268 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 282 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:54:56,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 518 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:54:56,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-25 17:54:56,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 234. [2022-11-25 17:54:56,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.1201716738197425) internal successors, (261), 233 states have internal predecessors, (261), 0 states have call successors, (0), 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 17:54:56,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 261 transitions. [2022-11-25 17:54:56,275 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 261 transitions. Word has length 52 [2022-11-25 17:54:56,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:54:56,276 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 261 transitions. [2022-11-25 17:54:56,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.282051282051282) internal successors, (128), 40 states have internal predecessors, (128), 0 states have call successors, (0), 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 17:54:56,276 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 261 transitions. [2022-11-25 17:54:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-25 17:54:56,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:54:56,277 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:54:56,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:56,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-25 17:54:56,483 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:54:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:56,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1586425820, now seen corresponding path program 6 times [2022-11-25 17:54:56,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:56,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720466356] [2022-11-25 17:54:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:56,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:57,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:57,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720466356] [2022-11-25 17:54:57,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720466356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:54:57,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102281276] [2022-11-25 17:54:57,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:54:57,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:57,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:54:57,133 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:54:57,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:54:57,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-25 17:54:57,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:54:57,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-25 17:54:57,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:57,523 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 14 treesize of output 10 [2022-11-25 17:54:57,780 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 17:54:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:57,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:54:57,936 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 13 [2022-11-25 17:54:57,939 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 16 treesize of output 12 [2022-11-25 17:54:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:58,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102281276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:54:58,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:54:58,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 36 [2022-11-25 17:54:58,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40424649] [2022-11-25 17:54:58,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:54:58,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 17:54:58,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:58,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 17:54:58,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 17:54:58,124 INFO L87 Difference]: Start difference. First operand 234 states and 261 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 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 17:54:59,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:54:59,467 INFO L93 Difference]: Finished difference Result 454 states and 496 transitions. [2022-11-25 17:54:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 17:54:59,469 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 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 57 [2022-11-25 17:54:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:54:59,471 INFO L225 Difference]: With dead ends: 454 [2022-11-25 17:54:59,471 INFO L226 Difference]: Without dead ends: 274 [2022-11-25 17:54:59,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=559, Invalid=3101, Unknown=0, NotChecked=0, Total=3660 [2022-11-25 17:54:59,472 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 275 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:54:59,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 832 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:54:59,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-25 17:54:59,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 250. [2022-11-25 17:54:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.1124497991967872) internal successors, (277), 249 states have internal predecessors, (277), 0 states have call successors, (0), 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 17:54:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 277 transitions. [2022-11-25 17:54:59,478 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 277 transitions. Word has length 57 [2022-11-25 17:54:59,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:54:59,479 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 277 transitions. [2022-11-25 17:54:59,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 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 17:54:59,479 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 277 transitions. [2022-11-25 17:54:59,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-25 17:54:59,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:54:59,480 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:54:59,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:59,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-25 17:54:59,691 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:54:59,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:59,691 INFO L85 PathProgramCache]: Analyzing trace with hash 2072623007, now seen corresponding path program 7 times [2022-11-25 17:54:59,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:59,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738476956] [2022-11-25 17:54:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:59,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:00,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:00,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738476956] [2022-11-25 17:55:00,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738476956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:00,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43630472] [2022-11-25 17:55:00,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:55:00,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:00,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:55:00,417 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:55:00,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:55:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:00,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-25 17:55:00,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:55:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:00,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:55:01,366 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 17:55:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:01,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43630472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:55:01,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:55:01,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 38 [2022-11-25 17:55:01,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632769029] [2022-11-25 17:55:01,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:55:01,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 17:55:01,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:01,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 17:55:01,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 17:55:01,498 INFO L87 Difference]: Start difference. First operand 250 states and 277 transitions. Second operand has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 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 17:55:02,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:55:02,627 INFO L93 Difference]: Finished difference Result 323 states and 353 transitions. [2022-11-25 17:55:02,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:55:02,627 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 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 61 [2022-11-25 17:55:02,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:55:02,628 INFO L225 Difference]: With dead ends: 323 [2022-11-25 17:55:02,628 INFO L226 Difference]: Without dead ends: 323 [2022-11-25 17:55:02,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=579, Invalid=2391, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 17:55:02,629 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 567 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:55:02,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 541 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:55:02,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-11-25 17:55:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 270. [2022-11-25 17:55:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.1152416356877324) internal successors, (300), 269 states have internal predecessors, (300), 0 states have call successors, (0), 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 17:55:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 300 transitions. [2022-11-25 17:55:02,638 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 300 transitions. Word has length 61 [2022-11-25 17:55:02,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:55:02,639 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 300 transitions. [2022-11-25 17:55:02,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 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 17:55:02,639 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 300 transitions. [2022-11-25 17:55:02,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-25 17:55:02,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:55:02,640 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:55:02,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:55:02,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:02,846 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:55:02,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:02,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1455608263, now seen corresponding path program 8 times [2022-11-25 17:55:02,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:02,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130285612] [2022-11-25 17:55:02,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:02,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:03,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:03,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130285612] [2022-11-25 17:55:03,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130285612] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:03,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244308563] [2022-11-25 17:55:03,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:55:03,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:03,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:55:03,603 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:55:03,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:55:03,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:55:03,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:55:03,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-25 17:55:03,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:55:04,086 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 14 treesize of output 10 [2022-11-25 17:55:05,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:55:05,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:55:05,116 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 18 treesize of output 10 [2022-11-25 17:55:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:05,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:55:05,451 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 13 [2022-11-25 17:55:05,454 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 24 treesize of output 20 [2022-11-25 17:55:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:06,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244308563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:55:06,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:55:06,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 54 [2022-11-25 17:55:06,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461398018] [2022-11-25 17:55:06,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:55:06,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-25 17:55:06,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:06,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-25 17:55:06,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2666, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 17:55:06,125 INFO L87 Difference]: Start difference. First operand 270 states and 300 transitions. Second operand has 54 states, 54 states have (on average 2.8333333333333335) internal successors, (153), 54 states have internal predecessors, (153), 0 states have call successors, (0), 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 17:55:08,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:55:08,611 INFO L93 Difference]: Finished difference Result 519 states and 567 transitions. [2022-11-25 17:55:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 17:55:08,611 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.8333333333333335) internal successors, (153), 54 states have internal predecessors, (153), 0 states have call successors, (0), 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 66 [2022-11-25 17:55:08,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:55:08,613 INFO L225 Difference]: With dead ends: 519 [2022-11-25 17:55:08,613 INFO L226 Difference]: Without dead ends: 310 [2022-11-25 17:55:08,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=770, Invalid=5872, Unknown=0, NotChecked=0, Total=6642 [2022-11-25 17:55:08,614 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 363 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 17:55:08,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 1131 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 17:55:08,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-25 17:55:08,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 286. [2022-11-25 17:55:08,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.1087719298245613) internal successors, (316), 285 states have internal predecessors, (316), 0 states have call successors, (0), 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 17:55:08,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 316 transitions. [2022-11-25 17:55:08,622 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 316 transitions. Word has length 66 [2022-11-25 17:55:08,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:55:08,622 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 316 transitions. [2022-11-25 17:55:08,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.8333333333333335) internal successors, (153), 54 states have internal predecessors, (153), 0 states have call successors, (0), 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 17:55:08,623 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 316 transitions. [2022-11-25 17:55:08,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 17:55:08,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:55:08,624 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:55:08,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:55:08,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:08,829 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:55:08,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:08,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1335660074, now seen corresponding path program 9 times [2022-11-25 17:55:08,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:08,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62759984] [2022-11-25 17:55:08,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:08,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:09,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:09,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62759984] [2022-11-25 17:55:09,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62759984] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:09,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109185047] [2022-11-25 17:55:09,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:55:09,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:09,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:55:09,491 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:55:09,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:55:09,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-25 17:55:09,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:55:09,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-25 17:55:09,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:55:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 45 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:10,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:55:10,964 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 5 [2022-11-25 17:55:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 45 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:11,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109185047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:55:11,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:55:11,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 49 [2022-11-25 17:55:11,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789406194] [2022-11-25 17:55:11,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:55:11,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-25 17:55:11,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:11,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-25 17:55:11,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=2157, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 17:55:11,147 INFO L87 Difference]: Start difference. First operand 286 states and 316 transitions. Second operand has 50 states, 49 states have (on average 3.5306122448979593) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 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 17:55:12,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:55:12,236 INFO L93 Difference]: Finished difference Result 368 states and 401 transitions. [2022-11-25 17:55:12,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 17:55:12,237 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.5306122448979593) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 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 70 [2022-11-25 17:55:12,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:55:12,239 INFO L225 Difference]: With dead ends: 368 [2022-11-25 17:55:12,239 INFO L226 Difference]: Without dead ends: 368 [2022-11-25 17:55:12,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 103 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=886, Invalid=3670, Unknown=0, NotChecked=0, Total=4556 [2022-11-25 17:55:12,240 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 570 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:55:12,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 558 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:55:12,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-11-25 17:55:12,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 306. [2022-11-25 17:55:12,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1114754098360655) internal successors, (339), 305 states have internal predecessors, (339), 0 states have call successors, (0), 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 17:55:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 339 transitions. [2022-11-25 17:55:12,249 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 339 transitions. Word has length 70 [2022-11-25 17:55:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:55:12,250 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 339 transitions. [2022-11-25 17:55:12,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.5306122448979593) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 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 17:55:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 339 transitions. [2022-11-25 17:55:12,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-25 17:55:12,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:55:12,251 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:55:12,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:55:12,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:12,457 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:55:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:12,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1463959138, now seen corresponding path program 10 times [2022-11-25 17:55:12,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:12,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388333888] [2022-11-25 17:55:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:12,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 14 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:13,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:13,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388333888] [2022-11-25 17:55:13,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388333888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:13,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375785943] [2022-11-25 17:55:13,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:55:13,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:13,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:55:13,277 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:55:13,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:55:13,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:55:13,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:55:13,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-25 17:55:13,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:55:13,745 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 14 treesize of output 10 [2022-11-25 17:56:02,710 INFO L321 Elim1Store]: treesize reduction 29, result has 49.1 percent of original size [2022-11-25 17:56:02,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 78 treesize of output 58 [2022-11-25 17:56:02,712 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 17:56:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 41 proven. 90 refuted. 54 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:02,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:56:10,716 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 104 treesize of output 90 [2022-11-25 17:56:10,744 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:10,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 104 treesize of output 78 [2022-11-25 17:56:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 119 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:11,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375785943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:56:11,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:56:11,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 41, 41] total 95 [2022-11-25 17:56:11,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550942264] [2022-11-25 17:56:11,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:56:11,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-11-25 17:56:11,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:56:11,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-11-25 17:56:11,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=719, Invalid=8156, Unknown=55, NotChecked=0, Total=8930 [2022-11-25 17:56:11,759 INFO L87 Difference]: Start difference. First operand 306 states and 339 transitions. Second operand has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 95 states have internal predecessors, (203), 0 states have call successors, (0), 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 17:56:19,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:57:10,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:57:18,913 WARN L233 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 80 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:57:26,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:57:52,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:57:52,244 INFO L93 Difference]: Finished difference Result 584 states and 638 transitions. [2022-11-25 17:57:52,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-25 17:57:52,245 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 95 states have internal predecessors, (203), 0 states have call successors, (0), 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 75 [2022-11-25 17:57:52,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:57:52,246 INFO L225 Difference]: With dead ends: 584 [2022-11-25 17:57:52,247 INFO L226 Difference]: Without dead ends: 346 [2022-11-25 17:57:52,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5179 ImplicationChecksByTransitivity, 149.3s TimeCoverageRelationStatistics Valid=3093, Invalid=19798, Unknown=61, NotChecked=0, Total=22952 [2022-11-25 17:57:52,250 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 536 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 2895 mSolverCounterSat, 10 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 2910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2895 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:57:52,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 1027 Invalid, 2910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2895 Invalid, 5 Unknown, 0 Unchecked, 8.2s Time] [2022-11-25 17:57:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-11-25 17:57:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 322. [2022-11-25 17:57:52,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.1059190031152648) internal successors, (355), 321 states have internal predecessors, (355), 0 states have call successors, (0), 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 17:57:52,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 355 transitions. [2022-11-25 17:57:52,258 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 355 transitions. Word has length 75 [2022-11-25 17:57:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:57:52,259 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 355 transitions. [2022-11-25 17:57:52,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 95 states have internal predecessors, (203), 0 states have call successors, (0), 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 17:57:52,259 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 355 transitions. [2022-11-25 17:57:52,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-25 17:57:52,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:57:52,260 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:57:52,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-25 17:57:52,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-25 17:57:52,467 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:57:52,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:57:52,468 INFO L85 PathProgramCache]: Analyzing trace with hash 75610981, now seen corresponding path program 11 times [2022-11-25 17:57:52,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:57:52,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615113238] [2022-11-25 17:57:52,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:57:52,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:57:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:57:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 45 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:57:53,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:57:53,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615113238] [2022-11-25 17:57:53,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615113238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:57:53,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145055672] [2022-11-25 17:57:53,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:57:53,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:57:53,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:57:53,324 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:57:53,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:57:53,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-25 17:57:53,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:57:53,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-25 17:57:53,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:57:53,498 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:57:53,498 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 17:57:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:57:54,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:57:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:57:55,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145055672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:57:55,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:57:55,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 54 [2022-11-25 17:57:55,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682409152] [2022-11-25 17:57:55,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:57:55,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-25 17:57:55,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:57:55,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-25 17:57:55,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=2585, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 17:57:55,148 INFO L87 Difference]: Start difference. First operand 322 states and 355 transitions. Second operand has 55 states, 54 states have (on average 3.5925925925925926) internal successors, (194), 55 states have internal predecessors, (194), 0 states have call successors, (0), 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 17:57:56,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:57:56,419 INFO L93 Difference]: Finished difference Result 413 states and 449 transitions. [2022-11-25 17:57:56,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 17:57:56,420 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.5925925925925926) internal successors, (194), 55 states have internal predecessors, (194), 0 states have call successors, (0), 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 79 [2022-11-25 17:57:56,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:57:56,422 INFO L225 Difference]: With dead ends: 413 [2022-11-25 17:57:56,422 INFO L226 Difference]: Without dead ends: 413 [2022-11-25 17:57:56,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1216, Invalid=4334, Unknown=0, NotChecked=0, Total=5550 [2022-11-25 17:57:56,424 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 492 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:57:56,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 816 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:57:56,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-11-25 17:57:56,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 342. [2022-11-25 17:57:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.1085043988269794) internal successors, (378), 341 states have internal predecessors, (378), 0 states have call successors, (0), 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 17:57:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 378 transitions. [2022-11-25 17:57:56,434 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 378 transitions. Word has length 79 [2022-11-25 17:57:56,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:57:56,434 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 378 transitions. [2022-11-25 17:57:56,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.5925925925925926) internal successors, (194), 55 states have internal predecessors, (194), 0 states have call successors, (0), 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 17:57:56,435 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 378 transitions. [2022-11-25 17:57:56,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-25 17:57:56,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:57:56,436 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:57:56,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:57:56,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-25 17:57:56,642 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:57:56,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:57:56,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1806603827, now seen corresponding path program 12 times [2022-11-25 17:57:56,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:57:56,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346208871] [2022-11-25 17:57:56,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:57:56,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:57:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:57:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:57:57,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:57:57,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346208871] [2022-11-25 17:57:57,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346208871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:57:57,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762209801] [2022-11-25 17:57:57,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:57:57,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:57:57,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:57:57,649 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:57:57,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:57:57,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-25 17:57:57,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:57:57,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-25 17:57:57,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:57:58,248 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 14 treesize of output 10 [2022-11-25 17:57:58,542 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 17:57:58,634 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 17:57:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:57:58,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:57:58,715 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 6 treesize of output 4 [2022-11-25 17:57:58,832 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 13 [2022-11-25 17:57:58,834 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 16 treesize of output 12 [2022-11-25 17:57:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:57:59,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762209801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:57:59,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:57:59,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 25] total 46 [2022-11-25 17:57:59,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744509662] [2022-11-25 17:57:59,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:57:59,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-25 17:57:59,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:57:59,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-25 17:57:59,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 17:57:59,044 INFO L87 Difference]: Start difference. First operand 342 states and 378 transitions. Second operand has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 46 states have internal predecessors, (136), 0 states have call successors, (0), 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 17:58:01,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:58:01,762 INFO L93 Difference]: Finished difference Result 649 states and 709 transitions. [2022-11-25 17:58:01,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 17:58:01,764 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 46 states have internal predecessors, (136), 0 states have call successors, (0), 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 84 [2022-11-25 17:58:01,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:58:01,766 INFO L225 Difference]: With dead ends: 649 [2022-11-25 17:58:01,766 INFO L226 Difference]: Without dead ends: 382 [2022-11-25 17:58:01,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 146 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=741, Invalid=5579, Unknown=0, NotChecked=0, Total=6320 [2022-11-25 17:58:01,767 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 506 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:58:01,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1474 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1727 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 17:58:01,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-25 17:58:01,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 358. [2022-11-25 17:58:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.1036414565826331) internal successors, (394), 357 states have internal predecessors, (394), 0 states have call successors, (0), 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 17:58:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 394 transitions. [2022-11-25 17:58:01,776 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 394 transitions. Word has length 84 [2022-11-25 17:58:01,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:58:01,777 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 394 transitions. [2022-11-25 17:58:01,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 46 states have internal predecessors, (136), 0 states have call successors, (0), 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 17:58:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 394 transitions. [2022-11-25 17:58:01,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-25 17:58:01,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:01,779 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:01,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-25 17:58:01,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-25 17:58:01,986 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:58:01,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:01,986 INFO L85 PathProgramCache]: Analyzing trace with hash -295170928, now seen corresponding path program 13 times [2022-11-25 17:58:01,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:01,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163381672] [2022-11-25 17:58:01,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:01,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 66 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:03,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:03,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163381672] [2022-11-25 17:58:03,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163381672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:03,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017865374] [2022-11-25 17:58:03,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:58:03,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:03,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:03,163 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:03,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:58:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:03,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-25 17:58:03,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:03,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:04,655 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 17:58:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:04,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017865374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:04,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:04,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 50 [2022-11-25 17:58:04,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956769446] [2022-11-25 17:58:04,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:04,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-25 17:58:04,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:04,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-25 17:58:04,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2288, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 17:58:04,919 INFO L87 Difference]: Start difference. First operand 358 states and 394 transitions. Second operand has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 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 17:58:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:58:06,831 INFO L93 Difference]: Finished difference Result 458 states and 497 transitions. [2022-11-25 17:58:06,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 17:58:06,832 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 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 88 [2022-11-25 17:58:06,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:58:06,834 INFO L225 Difference]: With dead ends: 458 [2022-11-25 17:58:06,834 INFO L226 Difference]: Without dead ends: 458 [2022-11-25 17:58:06,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 140 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1345 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1017, Invalid=4239, Unknown=0, NotChecked=0, Total=5256 [2022-11-25 17:58:06,835 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 707 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:58:06,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 1065 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 17:58:06,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-11-25 17:58:06,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 378. [2022-11-25 17:58:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.106100795755968) internal successors, (417), 377 states have internal predecessors, (417), 0 states have call successors, (0), 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 17:58:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 417 transitions. [2022-11-25 17:58:06,846 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 417 transitions. Word has length 88 [2022-11-25 17:58:06,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:58:06,846 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 417 transitions. [2022-11-25 17:58:06,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 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 17:58:06,846 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 417 transitions. [2022-11-25 17:58:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-25 17:58:06,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:06,848 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:06,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:58:07,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-25 17:58:07,054 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:58:07,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:07,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1131628520, now seen corresponding path program 14 times [2022-11-25 17:58:07,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:07,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439078729] [2022-11-25 17:58:07,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:07,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:08,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:08,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439078729] [2022-11-25 17:58:08,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439078729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:08,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067398916] [2022-11-25 17:58:08,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:58:08,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:08,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:08,227 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:08,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 17:58:08,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:58:08,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:58:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-25 17:58:08,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:08,765 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 14 treesize of output 10 [2022-11-25 17:58:09,077 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 17:58:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:09,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:09,276 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 13 [2022-11-25 17:58:09,279 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 16 treesize of output 12 [2022-11-25 17:58:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:09,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067398916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:09,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:09,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 48 [2022-11-25 17:58:09,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124263966] [2022-11-25 17:58:09,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:09,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-25 17:58:09,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:09,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-25 17:58:09,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2113, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 17:58:09,499 INFO L87 Difference]: Start difference. First operand 378 states and 417 transitions. Second operand has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 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 17:58:12,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:58:12,370 INFO L93 Difference]: Finished difference Result 714 states and 780 transitions. [2022-11-25 17:58:12,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-25 17:58:12,370 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 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 93 [2022-11-25 17:58:12,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:58:12,371 INFO L225 Difference]: With dead ends: 714 [2022-11-25 17:58:12,371 INFO L226 Difference]: Without dead ends: 418 [2022-11-25 17:58:12,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=795, Invalid=6345, Unknown=0, NotChecked=0, Total=7140 [2022-11-25 17:58:12,373 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 562 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 2339 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1975 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:58:12,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 1975 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2339 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 17:58:12,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-11-25 17:58:12,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 394. [2022-11-25 17:58:12,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.1017811704834606) internal successors, (433), 393 states have internal predecessors, (433), 0 states have call successors, (0), 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 17:58:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 433 transitions. [2022-11-25 17:58:12,381 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 433 transitions. Word has length 93 [2022-11-25 17:58:12,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:58:12,381 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 433 transitions. [2022-11-25 17:58:12,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 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 17:58:12,382 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 433 transitions. [2022-11-25 17:58:12,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-25 17:58:12,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:12,383 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:12,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 17:58:12,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-25 17:58:12,589 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:58:12,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:12,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1504487979, now seen corresponding path program 15 times [2022-11-25 17:58:12,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:12,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836351576] [2022-11-25 17:58:12,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:12,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 91 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:13,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:13,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836351576] [2022-11-25 17:58:13,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836351576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:13,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10954466] [2022-11-25 17:58:13,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:58:13,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:13,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:13,608 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:13,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 17:58:13,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-25 17:58:13,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:58:13,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-25 17:58:13,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:13,862 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:58:13,863 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 17:58:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 120 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:14,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 120 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:16,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10954466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:16,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:16,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 74 [2022-11-25 17:58:16,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748270171] [2022-11-25 17:58:16,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:16,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-25 17:58:16,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:16,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-25 17:58:16,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=665, Invalid=4885, Unknown=0, NotChecked=0, Total=5550 [2022-11-25 17:58:16,150 INFO L87 Difference]: Start difference. First operand 394 states and 433 transitions. Second operand has 75 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 75 states have internal predecessors, (281), 0 states have call successors, (0), 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 17:58:17,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:58:17,989 INFO L93 Difference]: Finished difference Result 503 states and 545 transitions. [2022-11-25 17:58:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 17:58:17,990 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 75 states have internal predecessors, (281), 0 states have call successors, (0), 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 97 [2022-11-25 17:58:17,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:58:17,991 INFO L225 Difference]: With dead ends: 503 [2022-11-25 17:58:17,991 INFO L226 Difference]: Without dead ends: 503 [2022-11-25 17:58:17,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2490 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1921, Invalid=7781, Unknown=0, NotChecked=0, Total=9702 [2022-11-25 17:58:17,993 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 846 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:58:17,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 1044 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:58:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-11-25 17:58:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 414. [2022-11-25 17:58:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.1041162227602905) internal successors, (456), 413 states have internal predecessors, (456), 0 states have call successors, (0), 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 17:58:18,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 456 transitions. [2022-11-25 17:58:18,004 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 456 transitions. Word has length 97 [2022-11-25 17:58:18,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:58:18,004 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 456 transitions. [2022-11-25 17:58:18,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 75 states have internal predecessors, (281), 0 states have call successors, (0), 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 17:58:18,005 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 456 transitions. [2022-11-25 17:58:18,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-25 17:58:18,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:18,006 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:18,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 17:58:18,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-25 17:58:18,212 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:58:18,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:18,213 INFO L85 PathProgramCache]: Analyzing trace with hash 872936237, now seen corresponding path program 16 times [2022-11-25 17:58:18,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:18,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571612040] [2022-11-25 17:58:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:18,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 20 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:19,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:19,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571612040] [2022-11-25 17:58:19,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571612040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:19,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223560617] [2022-11-25 17:58:19,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:58:19,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:19,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:19,441 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:19,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc1deed-b8ca-4579-a55f-9113a2142a31/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 17:58:19,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:58:19,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:58:19,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 154 conjunts are in the unsatisfiable core [2022-11-25 17:58:19,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:20,129 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 14 treesize of output 10 [2022-11-25 18:00:12,516 INFO L321 Elim1Store]: treesize reduction 41, result has 49.4 percent of original size [2022-11-25 18:00:12,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 108 treesize of output 82 [2022-11-25 18:00:12,519 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2022-11-25 18:00:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 35 proven. 189 refuted. 174 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:12,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:00:30,627 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 149 treesize of output 129 [2022-11-25 18:00:30,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:00:30,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 149 treesize of output 111 [2022-11-25 18:00:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 245 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:32,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223560617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:00:32,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:00:32,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 56, 56] total 131 [2022-11-25 18:00:32,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565535451] [2022-11-25 18:00:32,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:00:32,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-11-25 18:00:32,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:00:32,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-11-25 18:00:32,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=15565, Unknown=168, NotChecked=0, Total=17030 [2022-11-25 18:00:32,699 INFO L87 Difference]: Start difference. First operand 414 states and 456 transitions. Second operand has 131 states, 131 states have (on average 2.16793893129771) internal successors, (284), 131 states have internal predecessors, (284), 0 states have call successors, (0), 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 18:00:56,849 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 112 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:01:11,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:01:21,678 WARN L233 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 85 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:01:23,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:01:32,095 WARN L233 SmtUtils]: Spent 6.68s on a formula simplification. DAG size of input: 131 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:01:33,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:01:42,396 WARN L233 SmtUtils]: Spent 6.87s on a formula simplification. DAG size of input: 133 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:01:44,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:01:52,122 WARN L233 SmtUtils]: Spent 6.29s on a formula simplification. DAG size of input: 84 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:01:53,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:02:01,804 WARN L233 SmtUtils]: Spent 7.17s on a formula simplification. DAG size of input: 86 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:02:03,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:02:16,100 WARN L233 SmtUtils]: Spent 12.30s on a formula simplification. DAG size of input: 95 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:02:25,024 WARN L233 SmtUtils]: Spent 8.20s on a formula simplification. DAG size of input: 155 DAG size of output: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:02:38,408 WARN L233 SmtUtils]: Spent 12.74s on a formula simplification. DAG size of input: 157 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:02:53,446 WARN L233 SmtUtils]: Spent 14.59s on a formula simplification. DAG size of input: 99 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:02:54,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:03:16,897 WARN L233 SmtUtils]: Spent 18.40s on a formula simplification. DAG size of input: 101 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:03:18,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:03:19,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:03:29,293 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 100 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:03:30,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:03:31,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:03:43,609 WARN L233 SmtUtils]: Spent 10.72s on a formula simplification. DAG size of input: 159 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:03:59,875 WARN L233 SmtUtils]: Spent 15.54s on a formula simplification. DAG size of input: 171 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:04:16,146 WARN L233 SmtUtils]: Spent 15.36s on a formula simplification. DAG size of input: 109 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:04:21,853 WARN L233 SmtUtils]: Spent 5.34s on a formula simplification. DAG size of input: 100 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:04:36,745 WARN L233 SmtUtils]: Spent 14.46s on a formula simplification. DAG size of input: 111 DAG size of output: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:04:48,653 WARN L233 SmtUtils]: Spent 11.41s on a formula simplification. DAG size of input: 109 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:05:10,530 WARN L233 SmtUtils]: Spent 20.91s on a formula simplification. DAG size of input: 172 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:05:27,821 WARN L233 SmtUtils]: Spent 16.46s on a formula simplification. DAG size of input: 184 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:05:44,276 WARN L233 SmtUtils]: Spent 13.81s on a formula simplification. DAG size of input: 113 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:05:52,161 WARN L233 SmtUtils]: Spent 7.40s on a formula simplification. DAG size of input: 110 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:06:06,175 WARN L233 SmtUtils]: Spent 13.52s on a formula simplification. DAG size of input: 115 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:06:15,994 WARN L233 SmtUtils]: Spent 9.22s on a formula simplification. DAG size of input: 108 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:06:36,432 WARN L233 SmtUtils]: Spent 19.17s on a formula simplification. DAG size of input: 175 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:06:57,433 WARN L233 SmtUtils]: Spent 20.16s on a formula simplification. DAG size of input: 187 DAG size of output: 109 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:07:20,842 WARN L233 SmtUtils]: Spent 22.29s on a formula simplification. DAG size of input: 117 DAG size of output: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:07:31,406 WARN L233 SmtUtils]: Spent 10.11s on a formula simplification. DAG size of input: 114 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:08:02,227 WARN L233 SmtUtils]: Spent 30.37s on a formula simplification. DAG size of input: 117 DAG size of output: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)