./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN --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 cf0bb070a6f67963fcaf42c16427fd9b591ad6ca597a21a650e9cf23fa51a6dd --- 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-6b4ec56 [2022-11-20 10:50:14,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:50:14,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:50:14,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:50:14,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:50:14,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:50:14,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:50:14,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:50:14,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:50:14,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:50:14,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:50:14,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:50:14,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:50:14,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:50:14,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:50:14,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:50:14,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:50:14,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:50:14,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:50:14,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:50:14,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:50:14,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:50:14,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:50:14,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:50:14,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:50:14,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:50:14,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:50:14,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:50:14,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:50:14,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:50:14,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:50:14,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:50:14,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:50:14,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:50:14,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:50:14,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:50:14,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:50:14,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:50:14,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:50:14,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:50:14,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:50:14,530 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 10:50:14,568 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:50:14,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:50:14,569 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:50:14,569 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:50:14,570 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:50:14,570 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:50:14,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:50:14,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:50:14,572 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:50:14,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:50:14,573 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:50:14,573 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:50:14,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:50:14,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:50:14,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:50:14,574 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 10:50:14,574 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 10:50:14,575 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 10:50:14,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:50:14,575 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 10:50:14,575 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:50:14,575 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:50:14,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:50:14,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:50:14,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:50:14,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:50:14,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:50:14,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:50:14,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:50:14,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:50:14,578 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_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf0bb070a6f67963fcaf42c16427fd9b591ad6ca597a21a650e9cf23fa51a6dd [2022-11-20 10:50:14,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:50:14,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:50:14,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:50:14,917 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:50:14,917 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:50:14,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2022-11-20 10:50:18,050 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:50:18,263 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:50:18,263 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2022-11-20 10:50:18,269 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/data/ffcd8ef89/33dff74e3afd473e9a0031ca671b9b87/FLAG8ec9360e7 [2022-11-20 10:50:18,283 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/data/ffcd8ef89/33dff74e3afd473e9a0031ca671b9b87 [2022-11-20 10:50:18,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:50:18,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:50:18,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:50:18,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:50:18,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:50:18,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:18" (1/1) ... [2022-11-20 10:50:18,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ee596c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:18, skipping insertion in model container [2022-11-20 10:50:18,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:18" (1/1) ... [2022-11-20 10:50:18,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:50:18,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:50:18,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:50:18,473 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:50:18,486 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:50:18,499 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:50:18,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:18 WrapperNode [2022-11-20 10:50:18,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:50:18,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:50:18,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:50:18,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:50:18,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:18" (1/1) ... [2022-11-20 10:50:18,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:18" (1/1) ... [2022-11-20 10:50:18,538 INFO L138 Inliner]: procedures = 10, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 46 [2022-11-20 10:50:18,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:50:18,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:50:18,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:50:18,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:50:18,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:18" (1/1) ... [2022-11-20 10:50:18,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:18" (1/1) ... [2022-11-20 10:50:18,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:18" (1/1) ... [2022-11-20 10:50:18,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:18" (1/1) ... [2022-11-20 10:50:18,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:18" (1/1) ... [2022-11-20 10:50:18,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:18" (1/1) ... [2022-11-20 10:50:18,571 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:18" (1/1) ... [2022-11-20 10:50:18,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:18" (1/1) ... [2022-11-20 10:50:18,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:50:18,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:50:18,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:50:18,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:50:18,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:18" (1/1) ... [2022-11-20 10:50:18,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:50:18,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:18,620 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:50:18,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:50:18,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:50:18,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:50:18,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:50:18,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:50:18,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:50:18,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:50:18,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:50:18,764 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:50:18,765 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:50:18,934 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:50:18,940 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:50:18,940 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 10:50:18,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:18 BoogieIcfgContainer [2022-11-20 10:50:18,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:50:18,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:50:18,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:50:18,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:50:18,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:50:18" (1/3) ... [2022-11-20 10:50:18,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2309cf66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:18, skipping insertion in model container [2022-11-20 10:50:18,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:18" (2/3) ... [2022-11-20 10:50:18,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2309cf66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:18, skipping insertion in model container [2022-11-20 10:50:18,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:18" (3/3) ... [2022-11-20 10:50:18,962 INFO L112 eAbstractionObserver]: Analyzing ICFG getNumbers2.c [2022-11-20 10:50:18,982 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:50:18,983 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-11-20 10:50:19,086 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:50:19,092 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;@1b5a9ec1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:50:19,093 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-20 10:50:19,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:19,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 10:50:19,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:19,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 10:50:19,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:50:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:19,133 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-11-20 10:50:19,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:19,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993311502] [2022-11-20 10:50:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:19,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:19,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:19,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993311502] [2022-11-20 10:50:19,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993311502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:50:19,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:50:19,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:50:19,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126658094] [2022-11-20 10:50:19,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:19,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:50:19,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:19,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:50:19,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:50:19,516 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:19,600 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2022-11-20 10:50:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:50:19,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 [2022-11-20 10:50:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:19,612 INFO L225 Difference]: With dead ends: 27 [2022-11-20 10:50:19,613 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 10:50:19,615 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 [2022-11-20 10:50:19,623 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:19,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 10:50:19,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-20 10:50:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-11-20 10:50:19,654 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 4 [2022-11-20 10:50:19,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:19,654 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-11-20 10:50:19,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:19,655 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-11-20 10:50:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 10:50:19,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:19,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 10:50:19,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:50:19,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:50:19,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:19,657 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-11-20 10:50:19,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:19,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983622763] [2022-11-20 10:50:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:19,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:19,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:19,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983622763] [2022-11-20 10:50:19,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983622763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:50:19,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:50:19,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:50:19,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244773135] [2022-11-20 10:50:19,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:19,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:50:19,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:19,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:50:19,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:50:19,890 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:19,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:19,965 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-11-20 10:50:19,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:50:19,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 [2022-11-20 10:50:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:19,967 INFO L225 Difference]: With dead ends: 28 [2022-11-20 10:50:19,967 INFO L226 Difference]: Without dead ends: 28 [2022-11-20 10:50:19,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:50:19,971 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:19,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 25 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-20 10:50:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-20 10:50:19,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:19,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-11-20 10:50:19,977 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 4 [2022-11-20 10:50:19,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:19,978 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-11-20 10:50:19,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-11-20 10:50:19,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:50:19,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:19,979 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-20 10:50:19,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:50:19,979 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:50:19,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:19,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1809646286, now seen corresponding path program 1 times [2022-11-20 10:50:19,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:19,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186706250] [2022-11-20 10:50:19,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:19,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:20,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:20,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186706250] [2022-11-20 10:50:20,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186706250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:20,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771426159] [2022-11-20 10:50:20,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:20,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:20,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:20,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:20,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:50:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:20,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:50:20,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:20,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:20,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771426159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:20,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:20,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2022-11-20 10:50:20,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242929742] [2022-11-20 10:50:20,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:20,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:50:20,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:20,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:50:20,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:50:20,640 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:20,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:20,904 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-11-20 10:50:20,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:50:20,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 10:50:20,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:20,906 INFO L225 Difference]: With dead ends: 34 [2022-11-20 10:50:20,907 INFO L226 Difference]: Without dead ends: 34 [2022-11-20 10:50:20,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:50:20,911 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:20,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 35 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:20,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-20 10:50:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-20 10:50:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-11-20 10:50:20,923 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 7 [2022-11-20 10:50:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:20,923 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-11-20 10:50:20,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-11-20 10:50:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 10:50:20,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:20,926 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:20,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:21,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:21,132 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:50:21,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:21,133 INFO L85 PathProgramCache]: Analyzing trace with hash -2129139286, now seen corresponding path program 1 times [2022-11-20 10:50:21,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:21,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98121755] [2022-11-20 10:50:21,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:21,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:21,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:21,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98121755] [2022-11-20 10:50:21,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98121755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:21,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475171260] [2022-11-20 10:50:21,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:21,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:21,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:21,282 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:21,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:50:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:21,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:50:21,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:21,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:21,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475171260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:21,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:21,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-20 10:50:21,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139284572] [2022-11-20 10:50:21,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:21,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:50:21,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:21,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:50:21,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:50:21,477 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:21,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:21,531 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-11-20 10:50:21,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:50:21,532 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 10:50:21,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:21,533 INFO L225 Difference]: With dead ends: 52 [2022-11-20 10:50:21,533 INFO L226 Difference]: Without dead ends: 52 [2022-11-20 10:50:21,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:50:21,535 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:21,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 62 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-20 10:50:21,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-20 10:50:21,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-11-20 10:50:21,541 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 19 [2022-11-20 10:50:21,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:21,541 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-11-20 10:50:21,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:21,542 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-11-20 10:50:21,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 10:50:21,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:21,543 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:21,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:21,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:21,748 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:50:21,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1224069290, now seen corresponding path program 2 times [2022-11-20 10:50:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:21,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716023442] [2022-11-20 10:50:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:21,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:50:22,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:22,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716023442] [2022-11-20 10:50:22,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716023442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:50:22,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:50:22,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:50:22,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780151146] [2022-11-20 10:50:22,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:22,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:50:22,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:22,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:50:22,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:50:22,234 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:22,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:22,308 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2022-11-20 10:50:22,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:50:22,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-20 10:50:22,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:22,310 INFO L225 Difference]: With dead ends: 60 [2022-11-20 10:50:22,310 INFO L226 Difference]: Without dead ends: 60 [2022-11-20 10:50:22,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:50:22,311 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:22,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 26 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:22,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-20 10:50:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-11-20 10:50:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-11-20 10:50:22,316 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 37 [2022-11-20 10:50:22,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:22,317 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-11-20 10:50:22,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:22,317 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-11-20 10:50:22,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 10:50:22,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:22,318 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:22,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:50:22,319 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:50:22,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:22,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1224069289, now seen corresponding path program 1 times [2022-11-20 10:50:22,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:22,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502653752] [2022-11-20 10:50:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:22,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:50:22,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:22,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502653752] [2022-11-20 10:50:22,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502653752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:50:22,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:50:22,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:50:22,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855276687] [2022-11-20 10:50:22,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:22,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:50:22,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:50:22,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:50:22,548 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:22,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:22,605 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2022-11-20 10:50:22,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:50:22,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-20 10:50:22,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:22,606 INFO L225 Difference]: With dead ends: 53 [2022-11-20 10:50:22,606 INFO L226 Difference]: Without dead ends: 53 [2022-11-20 10:50:22,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:50:22,614 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:22,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 30 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:22,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-20 10:50:22,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-20 10:50:22,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.148936170212766) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:22,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-11-20 10:50:22,624 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 37 [2022-11-20 10:50:22,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:22,625 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-11-20 10:50:22,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:22,625 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-11-20 10:50:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 10:50:22,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:22,629 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:22,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:50:22,629 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:50:22,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:22,630 INFO L85 PathProgramCache]: Analyzing trace with hash -708557702, now seen corresponding path program 1 times [2022-11-20 10:50:22,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:22,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20227810] [2022-11-20 10:50:22,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:22,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:50:22,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:22,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20227810] [2022-11-20 10:50:22,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20227810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:50:22,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:50:22,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:50:22,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911438349] [2022-11-20 10:50:22,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:22,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:50:22,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:22,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:50:22,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:50:22,705 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:22,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:22,719 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-11-20 10:50:22,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:50:22,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 38 [2022-11-20 10:50:22,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:22,720 INFO L225 Difference]: With dead ends: 52 [2022-11-20 10:50:22,720 INFO L226 Difference]: Without dead ends: 52 [2022-11-20 10:50:22,721 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 [2022-11-20 10:50:22,721 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:22,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:22,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-20 10:50:22,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-20 10:50:22,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.127659574468085) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:22,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-11-20 10:50:22,726 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 38 [2022-11-20 10:50:22,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:22,726 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-11-20 10:50:22,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:22,726 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-11-20 10:50:22,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 10:50:22,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:22,727 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:22,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 10:50:22,727 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:50:22,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:22,728 INFO L85 PathProgramCache]: Analyzing trace with hash -708557701, now seen corresponding path program 1 times [2022-11-20 10:50:22,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:22,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136169989] [2022-11-20 10:50:22,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:22,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:50:22,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:22,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136169989] [2022-11-20 10:50:22,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136169989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:50:22,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:50:22,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:50:22,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674061894] [2022-11-20 10:50:22,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:22,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:50:22,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:22,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:50:22,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:50:22,840 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:22,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:22,863 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-11-20 10:50:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:50:22,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 38 [2022-11-20 10:50:22,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:22,864 INFO L225 Difference]: With dead ends: 55 [2022-11-20 10:50:22,864 INFO L226 Difference]: Without dead ends: 55 [2022-11-20 10:50:22,865 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 [2022-11-20 10:50:22,865 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:22,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:22,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-20 10:50:22,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-11-20 10:50:22,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.125) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-11-20 10:50:22,869 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 38 [2022-11-20 10:50:22,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:22,869 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-11-20 10:50:22,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:22,870 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-11-20 10:50:22,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 10:50:22,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:22,870 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:22,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 10:50:22,871 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:50:22,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:22,871 INFO L85 PathProgramCache]: Analyzing trace with hash 414994334, now seen corresponding path program 1 times [2022-11-20 10:50:22,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:22,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083672884] [2022-11-20 10:50:22,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:22,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:50:23,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:23,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083672884] [2022-11-20 10:50:23,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083672884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:23,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679812882] [2022-11-20 10:50:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:23,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:23,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:23,129 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:23,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:50:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:23,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:50:23,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:23,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:50:23,611 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 [2022-11-20 10:50:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:50:23,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:50:28,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679812882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:28,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:28,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-11-20 10:50:28,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710902175] [2022-11-20 10:50:28,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:28,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:50:28,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:28,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:50:28,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:50:28,455 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:28,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:28,755 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2022-11-20 10:50:28,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:50:28,756 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 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 42 [2022-11-20 10:50:28,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:28,756 INFO L225 Difference]: With dead ends: 85 [2022-11-20 10:50:28,756 INFO L226 Difference]: Without dead ends: 85 [2022-11-20 10:50:28,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:50:28,757 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 145 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:28,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 65 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 3 Unchecked, 0.1s Time] [2022-11-20 10:50:28,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-20 10:50:28,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2022-11-20 10:50:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 66 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2022-11-20 10:50:28,761 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 42 [2022-11-20 10:50:28,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:28,761 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2022-11-20 10:50:28,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2022-11-20 10:50:28,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 10:50:28,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:28,770 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:28,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:28,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:28,970 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:50:28,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:28,971 INFO L85 PathProgramCache]: Analyzing trace with hash -20077561, now seen corresponding path program 1 times [2022-11-20 10:50:28,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:28,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081966646] [2022-11-20 10:50:28,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:28,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-20 10:50:29,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:29,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081966646] [2022-11-20 10:50:29,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081966646] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:29,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512975810] [2022-11-20 10:50:29,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:29,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:29,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:29,229 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:29,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:50:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:29,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:50:29,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:29,338 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 [2022-11-20 10:50:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:50:29,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:50:29,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512975810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:29,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:29,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 10 [2022-11-20 10:50:29,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052804657] [2022-11-20 10:50:29,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:29,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:50:29,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:29,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:50:29,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:50:29,494 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 11 states, 10 states have (on average 4.1) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:29,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:29,730 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2022-11-20 10:50:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:50:29,730 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 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 43 [2022-11-20 10:50:29,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:29,731 INFO L225 Difference]: With dead ends: 66 [2022-11-20 10:50:29,731 INFO L226 Difference]: Without dead ends: 66 [2022-11-20 10:50:29,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:50:29,732 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:29,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 42 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:29,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-20 10:50:29,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-20 10:50:29,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:29,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-11-20 10:50:29,736 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 43 [2022-11-20 10:50:29,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:29,736 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-11-20 10:50:29,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:29,737 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-11-20 10:50:29,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 10:50:29,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:29,738 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:29,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:29,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:29,943 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:50:29,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:29,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1470341546, now seen corresponding path program 2 times [2022-11-20 10:50:29,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:29,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40391529] [2022-11-20 10:50:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:29,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:50:30,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:30,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40391529] [2022-11-20 10:50:30,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40391529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:30,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771855506] [2022-11-20 10:50:30,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:50:30,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:30,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:30,413 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:30,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:50:30,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:50:30,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:30,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 10:50:30,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:30,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:50:30,910 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 [2022-11-20 10:50:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:50:31,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:50:32,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771855506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:32,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:32,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-11-20 10:50:32,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086115081] [2022-11-20 10:50:32,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:32,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:50:32,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:32,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:50:32,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:50:32,160 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 23 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:32,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:32,940 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2022-11-20 10:50:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:50:32,940 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-20 10:50:32,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:32,941 INFO L225 Difference]: With dead ends: 136 [2022-11-20 10:50:32,941 INFO L226 Difference]: Without dead ends: 136 [2022-11-20 10:50:32,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=242, Invalid=880, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 10:50:32,942 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 361 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:32,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 165 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 288 Invalid, 0 Unknown, 31 Unchecked, 0.3s Time] [2022-11-20 10:50:32,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-20 10:50:32,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2022-11-20 10:50:32,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.108695652173913) internal successors, (102), 95 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2022-11-20 10:50:32,947 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 57 [2022-11-20 10:50:32,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:32,948 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2022-11-20 10:50:32,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:32,948 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2022-11-20 10:50:32,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 10:50:32,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:32,949 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:32,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:33,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:33,149 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:50:33,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:33,150 INFO L85 PathProgramCache]: Analyzing trace with hash 893071724, now seen corresponding path program 1 times [2022-11-20 10:50:33,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:33,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666493754] [2022-11-20 10:50:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:33,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:50:33,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:33,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666493754] [2022-11-20 10:50:33,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666493754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:33,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119484150] [2022-11-20 10:50:33,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:33,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:33,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:33,333 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:33,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:50:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:33,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:50:33,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:50:33,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:50:33,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119484150] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:33,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:33,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-11-20 10:50:33,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453980023] [2022-11-20 10:50:33,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:33,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:50:33,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:33,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:50:33,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:50:33,586 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:33,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:33,650 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2022-11-20 10:50:33,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:50:33,651 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 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 64 [2022-11-20 10:50:33,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:33,651 INFO L225 Difference]: With dead ends: 96 [2022-11-20 10:50:33,652 INFO L226 Difference]: Without dead ends: 96 [2022-11-20 10:50:33,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:50:33,653 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:33,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 65 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:50:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-20 10:50:33,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-11-20 10:50:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.0543478260869565) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:33,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-11-20 10:50:33,672 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 64 [2022-11-20 10:50:33,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:33,673 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-11-20 10:50:33,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:33,673 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-11-20 10:50:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 10:50:33,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:33,678 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:33,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:33,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 10:50:33,884 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:50:33,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:33,884 INFO L85 PathProgramCache]: Analyzing trace with hash -713446614, now seen corresponding path program 3 times [2022-11-20 10:50:33,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:33,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359584178] [2022-11-20 10:50:33,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:33,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 199 proven. 46 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:50:34,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:34,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359584178] [2022-11-20 10:50:34,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359584178] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:34,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104431854] [2022-11-20 10:50:34,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:50:34,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:34,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:34,165 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:34,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:50:34,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:50:34,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:34,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:50:34,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:34,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:50:34,569 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 [2022-11-20 10:50:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-11-20 10:50:34,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:50:34,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104431854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:50:34,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:50:34,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 19 [2022-11-20 10:50:34,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919404081] [2022-11-20 10:50:34,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:50:34,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:50:34,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:34,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:50:34,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:50:34,977 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:35,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:35,118 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2022-11-20 10:50:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:50:35,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 87 [2022-11-20 10:50:35,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:35,120 INFO L225 Difference]: With dead ends: 95 [2022-11-20 10:50:35,120 INFO L226 Difference]: Without dead ends: 95 [2022-11-20 10:50:35,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:50:35,121 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:35,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 29 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:50:35,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-20 10:50:35,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-11-20 10:50:35,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 91 states have (on average 1.043956043956044) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:35,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-11-20 10:50:35,124 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 87 [2022-11-20 10:50:35,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:35,124 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-11-20 10:50:35,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:35,124 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-11-20 10:50:35,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-20 10:50:35,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:35,125 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:35,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:35,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 10:50:35,326 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 10:50:35,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:35,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1572522744, now seen corresponding path program 2 times [2022-11-20 10:50:35,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:35,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343474897] [2022-11-20 10:50:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:35,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:50:35,401 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:50:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:50:35,487 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:50:35,487 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:50:35,488 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2022-11-20 10:50:35,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2022-11-20 10:50:35,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-11-20 10:50:35,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-11-20 10:50:35,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-11-20 10:50:35,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2022-11-20 10:50:35,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2022-11-20 10:50:35,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2022-11-20 10:50:35,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-11-20 10:50:35,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 10:50:35,496 INFO L444 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:35,501 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 10:50:35,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 10:50:35 BoogieIcfgContainer [2022-11-20 10:50:35,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 10:50:35,592 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 10:50:35,592 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 10:50:35,592 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 10:50:35,593 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:18" (3/4) ... [2022-11-20 10:50:35,595 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-20 10:50:35,675 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/witness.graphml [2022-11-20 10:50:35,675 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 10:50:35,676 INFO L158 Benchmark]: Toolchain (without parser) took 17388.58ms. Allocated memory was 165.7MB in the beginning and 283.1MB in the end (delta: 117.4MB). Free memory was 120.3MB in the beginning and 125.7MB in the end (delta: -5.4MB). Peak memory consumption was 115.1MB. Max. memory is 16.1GB. [2022-11-20 10:50:35,680 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 165.7MB. Free memory is still 135.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 10:50:35,681 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.61ms. Allocated memory is still 165.7MB. Free memory was 120.3MB in the beginning and 110.4MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 10:50:35,681 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.82ms. Allocated memory is still 165.7MB. Free memory was 110.4MB in the beginning and 109.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 10:50:35,681 INFO L158 Benchmark]: Boogie Preprocessor took 41.28ms. Allocated memory is still 165.7MB. Free memory was 109.0MB in the beginning and 107.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 10:50:35,682 INFO L158 Benchmark]: RCFGBuilder took 361.42ms. Allocated memory is still 165.7MB. Free memory was 107.6MB in the beginning and 95.8MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-20 10:50:35,682 INFO L158 Benchmark]: TraceAbstraction took 16646.39ms. Allocated memory was 165.7MB in the beginning and 283.1MB in the end (delta: 117.4MB). Free memory was 95.1MB in the beginning and 130.9MB in the end (delta: -35.8MB). Peak memory consumption was 83.6MB. Max. memory is 16.1GB. [2022-11-20 10:50:35,682 INFO L158 Benchmark]: Witness Printer took 83.39ms. Allocated memory is still 283.1MB. Free memory was 130.9MB in the beginning and 125.7MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-20 10:50:35,684 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 165.7MB. Free memory is still 135.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 211.61ms. Allocated memory is still 165.7MB. Free memory was 120.3MB in the beginning and 110.4MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.82ms. Allocated memory is still 165.7MB. Free memory was 110.4MB in the beginning and 109.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.28ms. Allocated memory is still 165.7MB. Free memory was 109.0MB in the beginning and 107.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 361.42ms. Allocated memory is still 165.7MB. Free memory was 107.6MB in the beginning and 95.8MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 16646.39ms. Allocated memory was 165.7MB in the beginning and 283.1MB in the end (delta: 117.4MB). Free memory was 95.1MB in the beginning and 130.9MB in the end (delta: -35.8MB). Peak memory consumption was 83.6MB. Max. memory is 16.1GB. * Witness Printer took 83.39ms. Allocated memory is still 283.1MB. Free memory was 130.9MB in the beginning and 125.7MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1] int array[10]; VAL [array={1:0}] [L25] CALL, EXPR getNumbers2() [L13] CALL, EXPR getNumbers() [L5] int i = 0; VAL [array={1:0}, i=0] [L5] COND TRUE i < 10 VAL [array={1:0}, i=0] [L6] array[i] = i VAL [array={1:0}, i=0] [L5] ++i VAL [array={1:0}, i=1] [L5] COND TRUE i < 10 VAL [array={1:0}, i=1] [L6] array[i] = i VAL [array={1:0}, i=1] [L5] ++i VAL [array={1:0}, i=2] [L5] COND TRUE i < 10 VAL [array={1:0}, i=2] [L6] array[i] = i VAL [array={1:0}, i=2] [L5] ++i VAL [array={1:0}, i=3] [L5] COND TRUE i < 10 VAL [array={1:0}, i=3] [L6] array[i] = i VAL [array={1:0}, i=3] [L5] ++i VAL [array={1:0}, i=4] [L5] COND TRUE i < 10 VAL [array={1:0}, i=4] [L6] array[i] = i VAL [array={1:0}, i=4] [L5] ++i VAL [array={1:0}, i=5] [L5] COND TRUE i < 10 VAL [array={1:0}, i=5] [L6] array[i] = i VAL [array={1:0}, i=5] [L5] ++i VAL [array={1:0}, i=6] [L5] COND TRUE i < 10 VAL [array={1:0}, i=6] [L6] array[i] = i VAL [array={1:0}, i=6] [L5] ++i VAL [array={1:0}, i=7] [L5] COND TRUE i < 10 VAL [array={1:0}, i=7] [L6] array[i] = i VAL [array={1:0}, i=7] [L5] ++i VAL [array={1:0}, i=8] [L5] COND TRUE i < 10 VAL [array={1:0}, i=8] [L6] array[i] = i VAL [array={1:0}, i=8] [L5] ++i VAL [array={1:0}, i=9] [L5] COND TRUE i < 10 VAL [array={1:0}, i=9] [L6] array[i] = i VAL [array={1:0}, i=9] [L5] ++i VAL [array={1:0}, i=10] [L5] COND FALSE !(i < 10) VAL [array={1:0}, i=10] [L9] return array; VAL [\result={1:0}, array={1:0}, i=10] [L13] RET, EXPR getNumbers() [L13] int* numbers = getNumbers(); [L15] int numbers2[10]; [L17] int i = 0; VAL [array={1:0}, i=0, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=0, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=0, numbers={1:0}, numbers2={10:0}, numbers[i]=0] [L18] numbers2[i] = numbers[i] VAL [array={1:0}, i=0, numbers={1:0}, numbers2={10:0}, numbers[i]=0] [L17] ++i VAL [array={1:0}, i=1, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=1, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=1, numbers={1:0}, numbers2={10:0}, numbers[i]=1] [L18] numbers2[i] = numbers[i] VAL [array={1:0}, i=1, numbers={1:0}, numbers2={10:0}, numbers[i]=1] [L17] ++i VAL [array={1:0}, i=2, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=2, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=2, numbers={1:0}, numbers2={10:0}, numbers[i]=2] [L18] numbers2[i] = numbers[i] VAL [array={1:0}, i=2, numbers={1:0}, numbers2={10:0}, numbers[i]=2] [L17] ++i VAL [array={1:0}, i=3, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=3, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=3, numbers={1:0}, numbers2={10:0}, numbers[i]=3] [L18] numbers2[i] = numbers[i] VAL [array={1:0}, i=3, numbers={1:0}, numbers2={10:0}, numbers[i]=3] [L17] ++i VAL [array={1:0}, i=4, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=4, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=4, numbers={1:0}, numbers2={10:0}, numbers[i]=4] [L18] numbers2[i] = numbers[i] VAL [array={1:0}, i=4, numbers={1:0}, numbers2={10:0}, numbers[i]=4] [L17] ++i VAL [array={1:0}, i=5, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=5, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=5, numbers={1:0}, numbers2={10:0}, numbers[i]=5] [L18] numbers2[i] = numbers[i] VAL [array={1:0}, i=5, numbers={1:0}, numbers2={10:0}, numbers[i]=5] [L17] ++i VAL [array={1:0}, i=6, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=6, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=6, numbers={1:0}, numbers2={10:0}, numbers[i]=6] [L18] numbers2[i] = numbers[i] VAL [array={1:0}, i=6, numbers={1:0}, numbers2={10:0}, numbers[i]=6] [L17] ++i VAL [array={1:0}, i=7, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=7, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=7, numbers={1:0}, numbers2={10:0}, numbers[i]=7] [L18] numbers2[i] = numbers[i] VAL [array={1:0}, i=7, numbers={1:0}, numbers2={10:0}, numbers[i]=7] [L17] ++i VAL [array={1:0}, i=8, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=8, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=8, numbers={1:0}, numbers2={10:0}, numbers[i]=8] [L18] numbers2[i] = numbers[i] VAL [array={1:0}, i=8, numbers={1:0}, numbers2={10:0}, numbers[i]=8] [L17] ++i VAL [array={1:0}, i=9, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=9, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=9, numbers={1:0}, numbers2={10:0}, numbers[i]=9] [L18] numbers2[i] = numbers[i] VAL [array={1:0}, i=9, numbers={1:0}, numbers2={10:0}, numbers[i]=9] [L17] ++i VAL [array={1:0}, i=10, numbers={1:0}, numbers2={10:0}] [L17] COND FALSE !(i < 10) VAL [array={1:0}, i=10, numbers={1:0}, numbers2={10:0}] [L21] return numbers2; [L21] return numbers2; VAL [\result={10:0}, array={1:0}, i=10, numbers={1:0}] [L25] RET, EXPR getNumbers2() [L25] int *numbers = getNumbers2(); [L26] numbers[0] = 100 - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 24]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 16.5s, OverallIterations: 14, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 962 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 962 mSDsluCounter, 620 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 34 IncrementalHoareTripleChecker+Unchecked, 416 mSDsCounter, 74 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 741 IncrementalHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 74 mSolverCounterUnsat, 204 mSDtfsCounter, 741 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 640 GetRequests, 498 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 6.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=11, InterpolantAutomatonStates: 96, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 68 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 11.1s InterpolantComputationTime, 885 NumberOfCodeBlocks, 813 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1002 ConstructedInterpolants, 68 QuantifiedInterpolants, 8753 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1045 ConjunctsInSsa, 97 ConjunctsInUnsatCore, 26 InterpolantComputations, 7 PerfectInterpolantSequences, 3056/3466 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-20 10:50:35,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81bc41ed-4a34-4543-b3e4-a18abc0a3dd9/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)