./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro --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 b29c7049a333b10d890b8afae901738020ed1f084c2a7d471b316f0abdba3430 --- 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-8393723 [2022-11-18 18:33:53,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:33:53,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:33:53,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:33:53,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:33:53,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:33:53,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:33:53,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:33:53,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:33:53,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:33:53,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:33:53,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:33:53,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:33:53,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:33:53,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:33:53,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:33:53,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:33:53,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:33:53,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:33:53,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:33:53,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:33:53,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:33:53,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:33:53,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:33:53,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:33:53,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:33:53,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:33:53,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:33:53,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:33:53,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:33:53,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:33:53,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:33:53,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:33:53,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:33:53,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:33:53,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:33:53,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:33:53,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:33:53,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:33:53,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:33:53,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:33:53,466 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 18:33:53,513 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:33:53,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:33:53,514 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:33:53,514 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:33:53,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:33:53,515 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:33:53,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:33:53,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:33:53,517 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:33:53,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:33:53,518 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:33:53,519 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 18:33:53,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:33:53,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:33:53,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:33:53,520 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 18:33:53,520 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 18:33:53,520 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 18:33:53,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:33:53,521 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 18:33:53,521 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:33:53,521 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:33:53,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:33:53,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:33:53,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:33:53,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:33:53,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:33:53,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:33:53,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:33:53,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:33:53,525 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b29c7049a333b10d890b8afae901738020ed1f084c2a7d471b316f0abdba3430 [2022-11-18 18:33:53,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:33:53,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:33:53,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:33:53,913 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:33:53,914 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:33:53,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i [2022-11-18 18:33:54,013 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/data/acdc202d3/48c7f9e0da994389ad276658a8f337a6/FLAG488b3338b [2022-11-18 18:33:54,634 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:33:54,635 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i [2022-11-18 18:33:54,650 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/data/acdc202d3/48c7f9e0da994389ad276658a8f337a6/FLAG488b3338b [2022-11-18 18:33:54,911 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/data/acdc202d3/48c7f9e0da994389ad276658a8f337a6 [2022-11-18 18:33:54,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:33:54,917 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:33:54,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:33:54,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:33:54,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:33:54,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:33:54" (1/1) ... [2022-11-18 18:33:54,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@377b9cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:54, skipping insertion in model container [2022-11-18 18:33:54,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:33:54" (1/1) ... [2022-11-18 18:33:54,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:33:55,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:33:55,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:33:55,748 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:33:55,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:33:55,881 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:33:55,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:55 WrapperNode [2022-11-18 18:33:55,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:33:55,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:33:55,883 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:33:55,883 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:33:55,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:55" (1/1) ... [2022-11-18 18:33:55,925 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:55" (1/1) ... [2022-11-18 18:33:55,967 INFO L138 Inliner]: procedures = 368, calls = 28, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 120 [2022-11-18 18:33:55,971 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:33:55,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:33:55,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:33:55,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:33:55,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:55" (1/1) ... [2022-11-18 18:33:55,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:55" (1/1) ... [2022-11-18 18:33:56,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:55" (1/1) ... [2022-11-18 18:33:56,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:55" (1/1) ... [2022-11-18 18:33:56,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:55" (1/1) ... [2022-11-18 18:33:56,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:55" (1/1) ... [2022-11-18 18:33:56,038 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:55" (1/1) ... [2022-11-18 18:33:56,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:55" (1/1) ... [2022-11-18 18:33:56,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:33:56,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:33:56,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:33:56,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:33:56,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:55" (1/1) ... [2022-11-18 18:33:56,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:33:56,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:56,096 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:33:56,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:33:56,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:33:56,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 18:33:56,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:33:56,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:33:56,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:33:56,149 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 18:33:56,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 18:33:56,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:33:56,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 18:33:56,150 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-18 18:33:56,150 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-18 18:33:56,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:33:56,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:33:56,152 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 18:33:56,354 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:33:56,357 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:33:56,879 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:33:56,889 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:33:56,890 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 18:33:56,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:33:56 BoogieIcfgContainer [2022-11-18 18:33:56,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:33:56,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:33:56,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:33:56,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:33:56,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:33:54" (1/3) ... [2022-11-18 18:33:56,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d18f856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:33:56, skipping insertion in model container [2022-11-18 18:33:56,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:55" (2/3) ... [2022-11-18 18:33:56,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d18f856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:33:56, skipping insertion in model container [2022-11-18 18:33:56,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:33:56" (3/3) ... [2022-11-18 18:33:56,903 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_17-arrayloop_nr.i [2022-11-18 18:33:56,924 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:33:56,925 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2022-11-18 18:33:56,925 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:33:57,073 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:33:57,118 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 18:33:57,139 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 181 transitions, 367 flow [2022-11-18 18:33:57,149 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 181 transitions, 367 flow [2022-11-18 18:33:57,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 181 transitions, 367 flow [2022-11-18 18:33:57,299 INFO L130 PetriNetUnfolder]: 6/180 cut-off events. [2022-11-18 18:33:57,299 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:33:57,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 180 events. 6/180 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 430 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2022-11-18 18:33:57,319 INFO L119 LiptonReduction]: Number of co-enabled transitions 7844 [2022-11-18 18:34:42,301 INFO L134 LiptonReduction]: Checked pairs total: 26616 [2022-11-18 18:34:42,301 INFO L136 LiptonReduction]: Total number of compositions: 171 [2022-11-18 18:34:42,312 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 72 places, 71 transitions, 147 flow [2022-11-18 18:34:42,390 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 814 states, 547 states have (on average 2.9579524680073126) internal successors, (1618), 813 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:42,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:34:42,421 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=FINITE_AUTOMATA, 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;@b894130, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:34:42,422 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2022-11-18 18:34:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand has 814 states, 547 states have (on average 2.9579524680073126) internal successors, (1618), 813 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:42,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 18:34:42,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:42,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 18:34:42,433 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-18 18:34:42,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:42,440 INFO L85 PathProgramCache]: Analyzing trace with hash 20697, now seen corresponding path program 1 times [2022-11-18 18:34:42,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:42,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622797867] [2022-11-18 18:34:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:42,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:42,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:42,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622797867] [2022-11-18 18:34:42,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622797867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:42,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:34:42,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 18:34:42,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079303695] [2022-11-18 18:34:42,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:42,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:34:42,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:43,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:34:43,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:34:43,026 INFO L87 Difference]: Start difference. First operand has 814 states, 547 states have (on average 2.9579524680073126) internal successors, (1618), 813 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:43,269 INFO L93 Difference]: Finished difference Result 668 states and 1330 transitions. [2022-11-18 18:34:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:34:43,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-18 18:34:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:43,303 INFO L225 Difference]: With dead ends: 668 [2022-11-18 18:34:43,307 INFO L226 Difference]: Without dead ends: 668 [2022-11-18 18:34:43,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:34:43,318 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:43,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 8 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:34:43,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-11-18 18:34:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 668. [2022-11-18 18:34:43,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 484 states have (on average 2.7479338842975207) internal successors, (1330), 667 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1330 transitions. [2022-11-18 18:34:43,412 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1330 transitions. Word has length 2 [2022-11-18 18:34:43,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:43,414 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 1330 transitions. [2022-11-18 18:34:43,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:43,414 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1330 transitions. [2022-11-18 18:34:43,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 18:34:43,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:43,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 18:34:43,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:34:43,416 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-18 18:34:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:43,416 INFO L85 PathProgramCache]: Analyzing trace with hash 20700, now seen corresponding path program 1 times [2022-11-18 18:34:43,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:43,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215963048] [2022-11-18 18:34:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:43,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:43,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:43,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215963048] [2022-11-18 18:34:43,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215963048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:43,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:34:43,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 18:34:43,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810650549] [2022-11-18 18:34:43,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:43,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:34:43,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:43,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:34:43,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:34:43,698 INFO L87 Difference]: Start difference. First operand 668 states and 1330 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:43,920 INFO L93 Difference]: Finished difference Result 669 states and 1331 transitions. [2022-11-18 18:34:43,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:34:43,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-18 18:34:43,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:43,925 INFO L225 Difference]: With dead ends: 669 [2022-11-18 18:34:43,925 INFO L226 Difference]: Without dead ends: 669 [2022-11-18 18:34:43,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:34:43,927 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:43,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:34:43,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-11-18 18:34:43,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 669. [2022-11-18 18:34:43,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 485 states have (on average 2.7443298969072165) internal successors, (1331), 668 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1331 transitions. [2022-11-18 18:34:43,959 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1331 transitions. Word has length 2 [2022-11-18 18:34:43,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:43,959 INFO L495 AbstractCegarLoop]: Abstraction has 669 states and 1331 transitions. [2022-11-18 18:34:43,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:43,960 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1331 transitions. [2022-11-18 18:34:43,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 18:34:43,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:43,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 18:34:43,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:34:43,961 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-18 18:34:43,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:43,962 INFO L85 PathProgramCache]: Analyzing trace with hash 642281, now seen corresponding path program 1 times [2022-11-18 18:34:43,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:43,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936039857] [2022-11-18 18:34:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:43,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:44,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:44,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936039857] [2022-11-18 18:34:44,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936039857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:44,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847017468] [2022-11-18 18:34:44,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:44,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:44,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:44,486 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:44,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:34:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:44,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 18:34:44,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:44,778 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 18:34:44,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-18 18:34:44,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:34:44,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:34:44,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:34:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:44,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:51,028 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:34:51,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:34:51,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2022-11-18 18:34:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:55,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847017468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:55,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:55,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-18 18:34:55,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689351425] [2022-11-18 18:34:55,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:55,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:34:55,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:55,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:34:55,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:34:55,211 INFO L87 Difference]: Start difference. First operand 669 states and 1331 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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) [2022-11-18 18:34:55,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:55,525 INFO L93 Difference]: Finished difference Result 671 states and 1336 transitions. [2022-11-18 18:34:55,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:34:55,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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 3 [2022-11-18 18:34:55,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:55,530 INFO L225 Difference]: With dead ends: 671 [2022-11-18 18:34:55,530 INFO L226 Difference]: Without dead ends: 671 [2022-11-18 18:34:55,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:34:55,532 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:55,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 124 Unchecked, 0.2s Time] [2022-11-18 18:34:55,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-11-18 18:34:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2022-11-18 18:34:55,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 487 states have (on average 2.7433264887063653) internal successors, (1336), 670 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:55,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1336 transitions. [2022-11-18 18:34:55,591 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1336 transitions. Word has length 3 [2022-11-18 18:34:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:55,591 INFO L495 AbstractCegarLoop]: Abstraction has 671 states and 1336 transitions. [2022-11-18 18:34:55,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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) [2022-11-18 18:34:55,592 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1336 transitions. [2022-11-18 18:34:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-18 18:34:55,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:55,592 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1] [2022-11-18 18:34:55,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:55,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:55,798 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-18 18:34:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:55,799 INFO L85 PathProgramCache]: Analyzing trace with hash 19911252, now seen corresponding path program 1 times [2022-11-18 18:34:55,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:55,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128279364] [2022-11-18 18:34:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:55,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:55,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:55,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128279364] [2022-11-18 18:34:55,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128279364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:55,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181649679] [2022-11-18 18:34:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:55,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:55,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:55,904 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:55,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:34:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:56,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:34:56,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:56,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:56,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181649679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:56,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:56,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-11-18 18:34:56,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746816791] [2022-11-18 18:34:56,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:56,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:34:56,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:56,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:34:56,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:34:56,111 INFO L87 Difference]: Start difference. First operand 671 states and 1336 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2022-11-18 18:34:57,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:57,016 INFO L93 Difference]: Finished difference Result 3448 states and 6883 transitions. [2022-11-18 18:34:57,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:34:57,017 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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 4 [2022-11-18 18:34:57,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:57,037 INFO L225 Difference]: With dead ends: 3448 [2022-11-18 18:34:57,037 INFO L226 Difference]: Without dead ends: 3448 [2022-11-18 18:34:57,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:34:57,039 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 558 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:57,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 79 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 18:34:57,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3448 states. [2022-11-18 18:34:57,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3448 to 2016. [2022-11-18 18:34:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 1832 states have (on average 2.976528384279476) internal successors, (5453), 2015 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:57,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 5453 transitions. [2022-11-18 18:34:57,127 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 5453 transitions. Word has length 4 [2022-11-18 18:34:57,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:57,127 INFO L495 AbstractCegarLoop]: Abstraction has 2016 states and 5453 transitions. [2022-11-18 18:34:57,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2022-11-18 18:34:57,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 5453 transitions. [2022-11-18 18:34:57,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 18:34:57,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:57,128 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1] [2022-11-18 18:34:57,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:57,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:57,334 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-18 18:34:57,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash 617250633, now seen corresponding path program 2 times [2022-11-18 18:34:57,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:57,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036138397] [2022-11-18 18:34:57,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:57,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:58,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:58,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036138397] [2022-11-18 18:34:58,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036138397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:58,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551342492] [2022-11-18 18:34:58,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:34:58,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:58,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:58,207 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:58,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:34:58,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:34:58,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:34:58,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 18:34:58,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:58,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:34:58,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:34:58,529 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:34:58,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 18 [2022-11-18 18:34:58,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:34:58,668 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-18 18:34:58,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2022-11-18 18:34:58,688 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 18:34:58,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 18:34:58,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:34:58,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2022-11-18 18:34:58,796 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 18:34:58,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 18:34:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:58,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:02,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:35:02,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2022-11-18 18:35:03,493 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:35:03,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 104 [2022-11-18 18:35:04,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:35:04,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 119 [2022-11-18 18:35:11,195 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 54 DAG size of output: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:35:11,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:11,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551342492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:35:11,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:35:11,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-11-18 18:35:11,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998538859] [2022-11-18 18:35:11,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:11,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 18:35:11,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:11,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 18:35:11,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:35:11,199 INFO L87 Difference]: Start difference. First operand 2016 states and 5453 transitions. Second operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:12,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:35:12,110 INFO L93 Difference]: Finished difference Result 2017 states and 5454 transitions. [2022-11-18 18:35:12,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:35:12,111 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 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 5 [2022-11-18 18:35:12,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:35:12,123 INFO L225 Difference]: With dead ends: 2017 [2022-11-18 18:35:12,124 INFO L226 Difference]: Without dead ends: 2017 [2022-11-18 18:35:12,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:35:12,125 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:35:12,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 224 Invalid, 0 Unknown, 188 Unchecked, 0.3s Time] [2022-11-18 18:35:12,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2022-11-18 18:35:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 2017. [2022-11-18 18:35:12,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 1833 states have (on average 2.9754500818330607) internal successors, (5454), 2016 states have internal predecessors, (5454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:12,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5454 transitions. [2022-11-18 18:35:12,188 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5454 transitions. Word has length 5 [2022-11-18 18:35:12,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:35:12,188 INFO L495 AbstractCegarLoop]: Abstraction has 2017 states and 5454 transitions. [2022-11-18 18:35:12,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5454 transitions. [2022-11-18 18:35:12,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 18:35:12,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:35:12,189 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1] [2022-11-18 18:35:12,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:35:12,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:12,395 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-18 18:35:12,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:12,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1759190420, now seen corresponding path program 2 times [2022-11-18 18:35:12,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:12,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337107229] [2022-11-18 18:35:12,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:12,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:12,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:12,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337107229] [2022-11-18 18:35:12,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337107229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:12,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438375400] [2022-11-18 18:35:12,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:35:12,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:12,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:12,632 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:12,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:35:12,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:35:12,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:35:12,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:35:12,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:12,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:13,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438375400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:35:13,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:35:13,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-18 18:35:13,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83720998] [2022-11-18 18:35:13,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:13,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 18:35:13,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:13,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 18:35:13,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:35:13,021 INFO L87 Difference]: Start difference. First operand 2017 states and 5454 transitions. Second operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:14,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:35:14,262 INFO L93 Difference]: Finished difference Result 5652 states and 11287 transitions. [2022-11-18 18:35:14,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:35:14,263 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 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 8 [2022-11-18 18:35:14,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:35:14,304 INFO L225 Difference]: With dead ends: 5652 [2022-11-18 18:35:14,304 INFO L226 Difference]: Without dead ends: 5652 [2022-11-18 18:35:14,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:35:14,316 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 924 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:35:14,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 119 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 18:35:14,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2022-11-18 18:35:14,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 3076. [2022-11-18 18:35:14,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3076 states, 2892 states have (on average 3.0127939142461964) internal successors, (8713), 3075 states have internal predecessors, (8713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:14,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3076 states to 3076 states and 8713 transitions. [2022-11-18 18:35:14,476 INFO L78 Accepts]: Start accepts. Automaton has 3076 states and 8713 transitions. Word has length 8 [2022-11-18 18:35:14,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:35:14,477 INFO L495 AbstractCegarLoop]: Abstraction has 3076 states and 8713 transitions. [2022-11-18 18:35:14,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:14,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3076 states and 8713 transitions. [2022-11-18 18:35:14,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 18:35:14,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:35:14,478 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1] [2022-11-18 18:35:14,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:35:14,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:14,686 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-18 18:35:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:14,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1299670007, now seen corresponding path program 3 times [2022-11-18 18:35:14,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:14,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791068755] [2022-11-18 18:35:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:14,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:16,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:16,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791068755] [2022-11-18 18:35:16,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791068755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:16,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306482822] [2022-11-18 18:35:16,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:35:16,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:16,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:16,320 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:16,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:35:22,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 18:35:22,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:35:22,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 18:35:22,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:22,136 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 18:35:22,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-18 18:35:22,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:35:22,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:35:22,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:35:22,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:35:22,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:35:22,292 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 18:35:22,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 18:35:22,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:35:22,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:35:22,359 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 18:35:22,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 18:35:22,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:35:22,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:35:22,442 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 18:35:22,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 18:35:22,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:35:22,516 INFO L321 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-11-18 18:35:22,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 18:35:22,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:35:22,638 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-18 18:35:22,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 26 [2022-11-18 18:35:22,652 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 18:35:22,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 18:35:22,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:35:22,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:35:22,738 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 18:35:22,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 18:35:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:22,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:26,932 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 18:35:26,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 18:35:27,065 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 18:35:27,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 18:35:27,248 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 18:35:27,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 18:35:27,595 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 18:35:27,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 18:35:29,737 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 18:35:29,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 18:35:29,991 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 18:35:29,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 18:35:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:32,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306482822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:35:32,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:35:32,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-11-18 18:35:32,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301177503] [2022-11-18 18:35:32,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:32,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 18:35:32,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:32,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 18:35:32,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=526, Unknown=1, NotChecked=0, Total=650 [2022-11-18 18:35:32,212 INFO L87 Difference]: Start difference. First operand 3076 states and 8713 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:33,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:35:33,197 INFO L93 Difference]: Finished difference Result 3076 states and 8710 transitions. [2022-11-18 18:35:33,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:35:33,198 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 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 [2022-11-18 18:35:33,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:35:33,217 INFO L225 Difference]: With dead ends: 3076 [2022-11-18 18:35:33,217 INFO L226 Difference]: Without dead ends: 3076 [2022-11-18 18:35:33,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=204, Invalid=851, Unknown=1, NotChecked=0, Total=1056 [2022-11-18 18:35:33,218 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:35:33,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 382 Unchecked, 0.4s Time] [2022-11-18 18:35:33,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2022-11-18 18:35:33,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 3076. [2022-11-18 18:35:33,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3076 states, 2892 states have (on average 3.011756569847856) internal successors, (8710), 3075 states have internal predecessors, (8710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3076 states to 3076 states and 8710 transitions. [2022-11-18 18:35:33,320 INFO L78 Accepts]: Start accepts. Automaton has 3076 states and 8710 transitions. Word has length 9 [2022-11-18 18:35:33,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:35:33,321 INFO L495 AbstractCegarLoop]: Abstraction has 3076 states and 8710 transitions. [2022-11-18 18:35:33,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:33,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3076 states and 8710 transitions. [2022-11-18 18:35:33,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:35:33,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:35:33,322 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-18 18:35:33,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:35:33,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:33,535 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-18 18:35:33,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:33,536 INFO L85 PathProgramCache]: Analyzing trace with hash 661571836, now seen corresponding path program 4 times [2022-11-18 18:35:33,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:33,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519545185] [2022-11-18 18:35:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:33,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:33,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:33,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519545185] [2022-11-18 18:35:33,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519545185] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:33,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493351084] [2022-11-18 18:35:33,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:35:33,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:33,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:34,002 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:34,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:35:34,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:35:34,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:35:34,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 18:35:34,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:34,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:35:34,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493351084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:35:34,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:35:34,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 12 [2022-11-18 18:35:34,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848259695] [2022-11-18 18:35:34,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:35:34,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 18:35:34,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:34,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 18:35:34,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:35:34,371 INFO L87 Difference]: Start difference. First operand 3076 states and 8710 transitions. Second operand has 13 states, 12 states have (on average 1.0) internal successors, (12), 12 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:35,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:35:35,844 INFO L93 Difference]: Finished difference Result 5649 states and 11260 transitions. [2022-11-18 18:35:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:35:35,845 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.0) internal successors, (12), 12 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-11-18 18:35:35,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:35:35,874 INFO L225 Difference]: With dead ends: 5649 [2022-11-18 18:35:35,874 INFO L226 Difference]: Without dead ends: 5649 [2022-11-18 18:35:35,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:35:35,876 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 553 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:35:35,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 252 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-18 18:35:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5649 states. [2022-11-18 18:35:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5649 to 3075. [2022-11-18 18:35:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3075 states, 2892 states have (on average 3.003457814661134) internal successors, (8686), 3074 states have internal predecessors, (8686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:35,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3075 states to 3075 states and 8686 transitions. [2022-11-18 18:35:35,991 INFO L78 Accepts]: Start accepts. Automaton has 3075 states and 8686 transitions. Word has length 12 [2022-11-18 18:35:35,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:35:35,992 INFO L495 AbstractCegarLoop]: Abstraction has 3075 states and 8686 transitions. [2022-11-18 18:35:35,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.0) internal successors, (12), 12 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:35,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3075 states and 8686 transitions. [2022-11-18 18:35:35,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:35:35,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:35:35,993 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-18 18:35:36,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:35:36,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 18:35:36,209 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-18 18:35:36,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:36,210 INFO L85 PathProgramCache]: Analyzing trace with hash 661571796, now seen corresponding path program 3 times [2022-11-18 18:35:36,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:36,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669390494] [2022-11-18 18:35:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:36,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-18 18:35:37,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:37,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669390494] [2022-11-18 18:35:37,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669390494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:37,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686403064] [2022-11-18 18:35:37,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:35:37,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:37,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:37,299 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:37,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:36:14,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 18:36:14,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:36:14,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 18:36:14,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:15,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 18:36:15,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:15,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:15,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:15,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:15,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:15,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:15,091 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 18:36:15,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:15,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:15,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:15,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:15,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:15,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:15,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:15,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:15,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:15,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:15,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:15,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:15,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 18:36:15,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:17,447 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2210 Int) (|v_ULTIMATE.start_new_~p~0#1.base_366| Int) (|v_ULTIMATE.start_new_~p~0#1.base_360| Int)) (or (= (select (store (store |c_#valid| |v_ULTIMATE.start_new_~p~0#1.base_366| 1) |v_ULTIMATE.start_new_~p~0#1.base_360| v_ArrVal_2210) |c_ULTIMATE.start_main_~#t1~0#1.base|) 1) (not (< |v_ULTIMATE.start_new_~p~0#1.base_360| |c_#StackHeapBarrier|)))) is different from false [2022-11-18 18:36:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 10 not checked. [2022-11-18 18:36:17,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686403064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:36:17,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:36:17,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 4 [2022-11-18 18:36:17,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858349201] [2022-11-18 18:36:17,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:17,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:36:17,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:17,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:36:17,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=11, Unknown=1, NotChecked=6, Total=30 [2022-11-18 18:36:17,595 INFO L87 Difference]: Start difference. First operand 3075 states and 8686 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:17,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:36:17,778 INFO L93 Difference]: Finished difference Result 3074 states and 8685 transitions. [2022-11-18 18:36:17,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:36:17,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:36:17,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:36:17,797 INFO L225 Difference]: With dead ends: 3074 [2022-11-18 18:36:17,798 INFO L226 Difference]: Without dead ends: 3074 [2022-11-18 18:36:17,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 11 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=12, Invalid=11, Unknown=1, NotChecked=6, Total=30 [2022-11-18 18:36:17,800 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:36:17,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 14 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2022-11-18 18:36:17,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2022-11-18 18:36:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 3074. [2022-11-18 18:36:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3074 states, 2892 states have (on average 3.0031120331950207) internal successors, (8685), 3073 states have internal predecessors, (8685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:17,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3074 states to 3074 states and 8685 transitions. [2022-11-18 18:36:17,890 INFO L78 Accepts]: Start accepts. Automaton has 3074 states and 8685 transitions. Word has length 12 [2022-11-18 18:36:17,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:36:17,891 INFO L495 AbstractCegarLoop]: Abstraction has 3074 states and 8685 transitions. [2022-11-18 18:36:17,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:17,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3074 states and 8685 transitions. [2022-11-18 18:36:17,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:36:17,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:36:17,893 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-18 18:36:17,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:36:18,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:18,111 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-18 18:36:18,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:18,112 INFO L85 PathProgramCache]: Analyzing trace with hash 661571798, now seen corresponding path program 1 times [2022-11-18 18:36:18,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:18,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524621472] [2022-11-18 18:36:18,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:18,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 18:36:19,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:19,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524621472] [2022-11-18 18:36:19,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524621472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:19,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367063271] [2022-11-18 18:36:19,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:19,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:19,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:19,275 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:19,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:36:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:19,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 18:36:19,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:19,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 18:36:19,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:19,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:19,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:19,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:19,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:19,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:19,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:19,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:19,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:19,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:19,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:19,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:19,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:19,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:19,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:19,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:19,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:19,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:19,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:19,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-18 18:36:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 18:36:19,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 18:36:20,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367063271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:36:20,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:36:20,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 5 [2022-11-18 18:36:20,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005901049] [2022-11-18 18:36:20,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:20,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:36:20,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:20,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:36:20,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:36:20,836 INFO L87 Difference]: Start difference. First operand 3074 states and 8685 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2022-11-18 18:36:21,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:36:21,083 INFO L93 Difference]: Finished difference Result 3073 states and 8684 transitions. [2022-11-18 18:36:21,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:36:21,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 12 [2022-11-18 18:36:21,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:36:21,096 INFO L225 Difference]: With dead ends: 3073 [2022-11-18 18:36:21,096 INFO L226 Difference]: Without dead ends: 3073 [2022-11-18 18:36:21,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 10 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:36:21,097 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 142 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:36:21,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 4 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:36:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3073 states. [2022-11-18 18:36:21,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3073 to 3073. [2022-11-18 18:36:21,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3073 states, 2892 states have (on average 3.0027662517289073) internal successors, (8684), 3072 states have internal predecessors, (8684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3073 states to 3073 states and 8684 transitions. [2022-11-18 18:36:21,185 INFO L78 Accepts]: Start accepts. Automaton has 3073 states and 8684 transitions. Word has length 12 [2022-11-18 18:36:21,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:36:21,186 INFO L495 AbstractCegarLoop]: Abstraction has 3073 states and 8684 transitions. [2022-11-18 18:36:21,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2022-11-18 18:36:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3073 states and 8684 transitions. [2022-11-18 18:36:21,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 18:36:21,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:36:21,187 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:21,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:36:21,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:21,394 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-18 18:36:21,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:21,395 INFO L85 PathProgramCache]: Analyzing trace with hash 464659688, now seen corresponding path program 1 times [2022-11-18 18:36:21,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:21,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322487365] [2022-11-18 18:36:21,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:21,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-18 18:36:21,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:21,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322487365] [2022-11-18 18:36:21,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322487365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:36:21,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:36:21,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:36:21,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945083938] [2022-11-18 18:36:21,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:36:21,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:36:21,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:21,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:36:21,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:36:21,631 INFO L87 Difference]: Start difference. First operand 3073 states and 8684 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:36:21,853 INFO L93 Difference]: Finished difference Result 3147 states and 8813 transitions. [2022-11-18 18:36:21,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:36:21,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-18 18:36:21,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:36:21,866 INFO L225 Difference]: With dead ends: 3147 [2022-11-18 18:36:21,866 INFO L226 Difference]: Without dead ends: 3147 [2022-11-18 18:36:21,866 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 [2022-11-18 18:36:21,867 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:36:21,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 16 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:36:21,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2022-11-18 18:36:21,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 2811. [2022-11-18 18:36:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2811 states, 2656 states have (on average 2.98644578313253) internal successors, (7932), 2810 states have internal predecessors, (7932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 7932 transitions. [2022-11-18 18:36:21,940 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 7932 transitions. Word has length 17 [2022-11-18 18:36:21,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:36:21,941 INFO L495 AbstractCegarLoop]: Abstraction has 2811 states and 7932 transitions. [2022-11-18 18:36:21,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:21,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 7932 transitions. [2022-11-18 18:36:21,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 18:36:21,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:36:21,942 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:21,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 18:36:21,943 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-18 18:36:21,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:21,943 INFO L85 PathProgramCache]: Analyzing trace with hash 464659689, now seen corresponding path program 1 times [2022-11-18 18:36:21,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:21,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833076942] [2022-11-18 18:36:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:21,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-18 18:36:22,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:22,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833076942] [2022-11-18 18:36:22,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833076942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:36:22,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:36:22,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:36:22,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014293094] [2022-11-18 18:36:22,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:36:22,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:36:22,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:22,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:36:22,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:36:22,374 INFO L87 Difference]: Start difference. First operand 2811 states and 7932 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:22,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:36:22,587 INFO L93 Difference]: Finished difference Result 2809 states and 7920 transitions. [2022-11-18 18:36:22,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:36:22,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-18 18:36:22,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:36:22,602 INFO L225 Difference]: With dead ends: 2809 [2022-11-18 18:36:22,602 INFO L226 Difference]: Without dead ends: 2809 [2022-11-18 18:36:22,602 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 [2022-11-18 18:36:22,603 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:36:22,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 6 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:36:22,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2022-11-18 18:36:22,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2533. [2022-11-18 18:36:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2533 states, 2408 states have (on average 2.963455149501661) internal successors, (7136), 2532 states have internal predecessors, (7136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:22,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2533 states to 2533 states and 7136 transitions. [2022-11-18 18:36:22,672 INFO L78 Accepts]: Start accepts. Automaton has 2533 states and 7136 transitions. Word has length 17 [2022-11-18 18:36:22,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:36:22,672 INFO L495 AbstractCegarLoop]: Abstraction has 2533 states and 7136 transitions. [2022-11-18 18:36:22,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:22,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2533 states and 7136 transitions. [2022-11-18 18:36:22,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 18:36:22,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:36:22,673 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:22,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 18:36:22,674 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-18 18:36:22,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:22,674 INFO L85 PathProgramCache]: Analyzing trace with hash 465236937, now seen corresponding path program 1 times [2022-11-18 18:36:22,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:22,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911590008] [2022-11-18 18:36:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:22,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-18 18:36:22,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:23,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911590008] [2022-11-18 18:36:23,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911590008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:36:23,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:36:23,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:36:23,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190318957] [2022-11-18 18:36:23,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:36:23,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:36:23,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:23,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:36:23,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:36:23,002 INFO L87 Difference]: Start difference. First operand 2533 states and 7136 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:23,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:36:23,124 INFO L93 Difference]: Finished difference Result 2497 states and 6740 transitions. [2022-11-18 18:36:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:36:23,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-18 18:36:23,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:36:23,137 INFO L225 Difference]: With dead ends: 2497 [2022-11-18 18:36:23,137 INFO L226 Difference]: Without dead ends: 2497 [2022-11-18 18:36:23,138 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 [2022-11-18 18:36:23,138 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:36:23,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 2 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:36:23,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2022-11-18 18:36:23,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2497. [2022-11-18 18:36:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 2388 states have (on average 2.8224455611390287) internal successors, (6740), 2496 states have internal predecessors, (6740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 6740 transitions. [2022-11-18 18:36:23,216 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 6740 transitions. Word has length 17 [2022-11-18 18:36:23,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:36:23,216 INFO L495 AbstractCegarLoop]: Abstraction has 2497 states and 6740 transitions. [2022-11-18 18:36:23,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:23,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 6740 transitions. [2022-11-18 18:36:23,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 18:36:23,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:36:23,218 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:23,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 18:36:23,218 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-18 18:36:23,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:23,219 INFO L85 PathProgramCache]: Analyzing trace with hash -138622530, now seen corresponding path program 1 times [2022-11-18 18:36:23,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:23,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711243818] [2022-11-18 18:36:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:23,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:24,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:24,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711243818] [2022-11-18 18:36:24,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711243818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:24,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712357305] [2022-11-18 18:36:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:24,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:24,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:24,026 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:24,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:36:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:24,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 18:36:24,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:24,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:24,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 16 [2022-11-18 18:36:24,869 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 18:36:24,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 18:36:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:24,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:27,178 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 51 treesize of output 47 [2022-11-18 18:36:27,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:36:27,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 62 [2022-11-18 18:36:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:27,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712357305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:36:27,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:36:27,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2022-11-18 18:36:27,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372470834] [2022-11-18 18:36:27,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:27,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 18:36:27,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:27,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 18:36:27,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 18:36:27,592 INFO L87 Difference]: Start difference. First operand 2497 states and 6740 transitions. Second operand has 40 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:36:35,930 INFO L93 Difference]: Finished difference Result 13919 states and 28226 transitions. [2022-11-18 18:36:35,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-18 18:36:35,931 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-18 18:36:35,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:36:35,966 INFO L225 Difference]: With dead ends: 13919 [2022-11-18 18:36:35,967 INFO L226 Difference]: Without dead ends: 13919 [2022-11-18 18:36:35,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 22 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2355, Invalid=6017, Unknown=0, NotChecked=0, Total=8372 [2022-11-18 18:36:35,969 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1894 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 4433 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1894 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 5429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 897 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:36:35,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1894 Valid, 184 Invalid, 5429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4433 Invalid, 0 Unknown, 897 Unchecked, 5.3s Time] [2022-11-18 18:36:35,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13919 states. [2022-11-18 18:36:36,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13919 to 4618. [2022-11-18 18:36:36,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4618 states, 4509 states have (on average 2.987358616101131) internal successors, (13470), 4617 states have internal predecessors, (13470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 13470 transitions. [2022-11-18 18:36:36,133 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 13470 transitions. Word has length 19 [2022-11-18 18:36:36,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:36:36,134 INFO L495 AbstractCegarLoop]: Abstraction has 4618 states and 13470 transitions. [2022-11-18 18:36:36,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:36,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 13470 transitions. [2022-11-18 18:36:36,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 18:36:36,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:36:36,135 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:36,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:36:36,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:36,343 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-18 18:36:36,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:36,344 INFO L85 PathProgramCache]: Analyzing trace with hash 416113612, now seen corresponding path program 1 times [2022-11-18 18:36:36,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:36,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910480880] [2022-11-18 18:36:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:36,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:42,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:42,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910480880] [2022-11-18 18:36:42,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910480880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:42,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361215446] [2022-11-18 18:36:42,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:42,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:42,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:42,511 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:42,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731f4c12-a716-42dc-b088-75f093509f58/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:36:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:43,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 173 conjunts are in the unsatisfiable core [2022-11-18 18:36:43,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:43,116 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 18:36:43,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 18:36:43,216 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-18 18:36:43,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-18 18:36:43,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-18 18:36:43,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-18 18:36:43,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-18 18:36:43,328 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-18 18:36:43,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 35 [2022-11-18 18:36:43,333 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 23 treesize of output 17 [2022-11-18 18:36:43,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:43,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:43,501 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 57 treesize of output 48 [2022-11-18 18:36:43,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:43,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 37 treesize of output 37 [2022-11-18 18:36:43,556 INFO L321 Elim1Store]: treesize reduction 57, result has 24.0 percent of original size [2022-11-18 18:36:43,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 32 [2022-11-18 18:36:43,571 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 17 treesize of output 13 [2022-11-18 18:36:43,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-18 18:36:43,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:43,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:43,663 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 28 treesize of output 25 [2022-11-18 18:36:43,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:43,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 20 treesize of output 24 [2022-11-18 18:36:43,719 INFO L321 Elim1Store]: treesize reduction 65, result has 25.3 percent of original size [2022-11-18 18:36:43,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 36 [2022-11-18 18:36:43,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-18 18:36:43,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:43,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:43,856 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:36:43,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 47 [2022-11-18 18:36:43,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:43,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 28 [2022-11-18 18:36:43,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:36:43,914 INFO L321 Elim1Store]: treesize reduction 55, result has 28.6 percent of original size [2022-11-18 18:36:43,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 36 [2022-11-18 18:36:44,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-18 18:36:44,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:44,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:44,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:44,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2022-11-18 18:36:44,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:44,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 28 [2022-11-18 18:36:44,305 INFO L321 Elim1Store]: treesize reduction 83, result has 27.2 percent of original size [2022-11-18 18:36:44,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 31 treesize of output 48 [2022-11-18 18:36:44,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-18 18:36:44,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:44,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:44,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:44,501 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:36:44,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 65 [2022-11-18 18:36:44,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:44,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 32 treesize of output 32 [2022-11-18 18:36:44,593 INFO L321 Elim1Store]: treesize reduction 83, result has 27.2 percent of original size [2022-11-18 18:36:44,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 31 treesize of output 48 [2022-11-18 18:36:45,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:45,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:45,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:45,070 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-11-18 18:36:45,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 95 [2022-11-18 18:36:45,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:45,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 38 treesize of output 36 [2022-11-18 18:36:45,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:36:45,164 INFO L321 Elim1Store]: treesize reduction 73, result has 29.8 percent of original size [2022-11-18 18:36:45,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 31 treesize of output 48 [2022-11-18 18:36:45,250 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 18:36:45,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2022-11-18 18:36:46,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-18 18:36:46,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:46,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:46,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:46,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-18 18:36:46,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:46,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 32 treesize of output 32 [2022-11-18 18:36:46,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:36:46,461 INFO L321 Elim1Store]: treesize reduction 91, result has 30.5 percent of original size [2022-11-18 18:36:46,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 36 treesize of output 60 [2022-11-18 18:36:46,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-18 18:36:46,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:46,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:46,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:46,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:46,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 67 [2022-11-18 18:36:46,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:46,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 38 treesize of output 36 [2022-11-18 18:36:46,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:36:46,890 INFO L321 Elim1Store]: treesize reduction 109, result has 31.0 percent of original size [2022-11-18 18:36:46,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 41 treesize of output 72 [2022-11-18 18:36:47,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-18 18:36:47,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:47,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:47,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:47,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:47,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:47,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 85 [2022-11-18 18:36:47,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:47,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 44 treesize of output 40 [2022-11-18 18:36:47,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:36:47,421 INFO L321 Elim1Store]: treesize reduction 127, result has 31.4 percent of original size [2022-11-18 18:36:47,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 46 treesize of output 84 [2022-11-18 18:36:47,858 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-18 18:36:47,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 92 treesize of output 112 [2022-11-18 18:36:52,094 INFO L321 Elim1Store]: treesize reduction 150, result has 32.4 percent of original size [2022-11-18 18:36:52,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 101 [2022-11-18 18:36:52,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 90 [2022-11-18 18:36:53,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 90 [2022-11-18 18:36:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 26 proven. 21 refuted. 8 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:53,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:53,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:36:53,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 48 [2022-11-18 18:36:54,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:36:54,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 87 [2022-11-18 18:36:54,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:36:54,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 162 [2022-11-18 18:36:55,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:36:55,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 751 treesize of output 600 [2022-11-18 18:36:57,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:36:57,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1490 treesize of output 1179 [2022-11-18 18:36:59,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:36:59,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 2965 treesize of output 2334 [2022-11-18 18:37:02,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:37:02,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 5912 treesize of output 4641 [2022-11-18 18:37:15,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:37:15,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:37:15,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:37:15,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:37:15,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:37:15,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:37:15,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:37:15,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:37:15,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:37:15,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:37:15,527 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 282 treesize of output 280