./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8 --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 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 --- 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-2329fc7 [2022-12-13 15:01:32,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:01:32,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:01:32,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:01:32,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:01:32,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:01:32,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:01:32,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:01:32,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:01:32,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:01:32,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:01:32,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:01:32,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:01:32,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:01:32,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:01:32,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:01:32,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:01:32,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:01:32,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:01:32,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:01:32,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:01:32,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:01:32,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:01:32,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:01:32,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:01:32,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:01:32,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:01:32,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:01:32,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:01:32,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:01:32,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:01:32,296 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:01:32,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:01:32,297 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:01:32,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:01:32,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:01:32,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:01:32,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:01:32,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:01:32,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:01:32,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:01:32,300 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 15:01:32,316 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:01:32,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:01:32,317 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:01:32,317 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:01:32,317 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:01:32,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:01:32,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:01:32,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:01:32,318 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:01:32,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:01:32,319 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:01:32,319 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 15:01:32,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:01:32,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:01:32,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:01:32,319 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 15:01:32,320 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 15:01:32,320 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 15:01:32,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:01:32,320 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 15:01:32,320 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:01:32,320 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:01:32,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:01:32,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:01:32,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:01:32,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:01:32,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:01:32,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:01:32,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:01:32,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:01:32,322 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:01:32,322 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:01:32,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:01:32,322 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:01:32,323 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 [2022-12-13 15:01:32,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:01:32,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:01:32,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:01:32,509 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:01:32,509 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:01:32,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2022-12-13 15:01:35,148 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:01:35,293 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:01:35,293 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2022-12-13 15:01:35,301 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/data/e48e4de6d/5a2f01670e174f69b4f5ba28866e1b55/FLAGd3b76bc44 [2022-12-13 15:01:35,313 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/data/e48e4de6d/5a2f01670e174f69b4f5ba28866e1b55 [2022-12-13 15:01:35,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:01:35,316 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:01:35,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:01:35,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:01:35,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:01:35,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:01:35" (1/1) ... [2022-12-13 15:01:35,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ad4bd3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:35, skipping insertion in model container [2022-12-13 15:01:35,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:01:35" (1/1) ... [2022-12-13 15:01:35,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:01:35,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:01:35,538 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:01:35,547 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:01:35,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:01:35,591 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:01:35,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:35 WrapperNode [2022-12-13 15:01:35,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:01:35,593 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:01:35,593 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:01:35,593 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:01:35,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:35" (1/1) ... [2022-12-13 15:01:35,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:35" (1/1) ... [2022-12-13 15:01:35,622 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 101 [2022-12-13 15:01:35,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:01:35,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:01:35,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:01:35,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:01:35,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:35" (1/1) ... [2022-12-13 15:01:35,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:35" (1/1) ... [2022-12-13 15:01:35,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:35" (1/1) ... [2022-12-13 15:01:35,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:35" (1/1) ... [2022-12-13 15:01:35,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:35" (1/1) ... [2022-12-13 15:01:35,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:35" (1/1) ... [2022-12-13 15:01:35,647 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:35" (1/1) ... [2022-12-13 15:01:35,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:35" (1/1) ... [2022-12-13 15:01:35,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:01:35,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:01:35,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:01:35,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:01:35,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:35" (1/1) ... [2022-12-13 15:01:35,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:01:35,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:35,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:01:35,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:01:35,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 15:01:35,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 15:01:35,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:01:35,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:01:35,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:01:35,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:01:35,791 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:01:35,792 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:01:35,955 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:01:35,960 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:01:35,960 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 15:01:35,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:01:35 BoogieIcfgContainer [2022-12-13 15:01:35,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:01:35,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:01:35,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:01:35,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:01:35,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:01:35" (1/3) ... [2022-12-13 15:01:35,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28e789bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:01:35, skipping insertion in model container [2022-12-13 15:01:35,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:35" (2/3) ... [2022-12-13 15:01:35,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28e789bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:01:35, skipping insertion in model container [2022-12-13 15:01:35,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:01:35" (3/3) ... [2022-12-13 15:01:35,968 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrpbrk-alloca-2.i [2022-12-13 15:01:35,981 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:01:35,981 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-12-13 15:01:36,011 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:01:36,016 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c937dfa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:01:36,016 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-12-13 15:01:36,019 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.911764705882353) internal successors, (65), 53 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) [2022-12-13 15:01:36,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 15:01:36,023 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:36,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:36,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:36,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:36,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-12-13 15:01:36,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:36,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151071430] [2022-12-13 15:01:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:36,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:36,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:36,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151071430] [2022-12-13 15:01:36,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151071430] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:36,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:36,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:01:36,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692512616] [2022-12-13 15:01:36,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:36,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:01:36,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:36,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:01:36,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:01:36,267 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.911764705882353) internal successors, (65), 53 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) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:36,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:36,312 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-12-13 15:01:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:01:36,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 15:01:36,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:36,320 INFO L225 Difference]: With dead ends: 100 [2022-12-13 15:01:36,320 INFO L226 Difference]: Without dead ends: 96 [2022-12-13 15:01:36,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:01:36,324 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 49 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:36,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 160 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:01:36,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-13 15:01:36,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2022-12-13 15:01:36,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-12-13 15:01:36,348 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2022-12-13 15:01:36,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:36,349 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-12-13 15:01:36,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:36,349 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-12-13 15:01:36,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 15:01:36,349 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:36,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:36,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:01:36,350 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:36,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:36,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-12-13 15:01:36,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:36,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028824640] [2022-12-13 15:01:36,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:36,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:36,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:36,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028824640] [2022-12-13 15:01:36,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028824640] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:36,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:36,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:01:36,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630854916] [2022-12-13 15:01:36,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:36,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:01:36,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:36,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:01:36,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:01:36,505 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:36,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:36,540 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-12-13 15:01:36,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:01:36,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 15:01:36,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:36,541 INFO L225 Difference]: With dead ends: 53 [2022-12-13 15:01:36,541 INFO L226 Difference]: Without dead ends: 53 [2022-12-13 15:01:36,541 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 [2022-12-13 15:01:36,543 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:36,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:01:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-13 15:01:36,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-12-13 15:01:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-12-13 15:01:36,549 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2022-12-13 15:01:36,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:36,550 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-12-13 15:01:36,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:36,550 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-12-13 15:01:36,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 15:01:36,551 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:36,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:36,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:01:36,551 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:36,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:36,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-12-13 15:01:36,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:36,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950158662] [2022-12-13 15:01:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:36,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:36,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:36,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950158662] [2022-12-13 15:01:36,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950158662] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:36,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:36,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:01:36,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352967111] [2022-12-13 15:01:36,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:36,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:01:36,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:36,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:01:36,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:01:36,752 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:36,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:36,861 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2022-12-13 15:01:36,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:01:36,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 15:01:36,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:36,862 INFO L225 Difference]: With dead ends: 97 [2022-12-13 15:01:36,862 INFO L226 Difference]: Without dead ends: 97 [2022-12-13 15:01:36,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:01:36,864 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 102 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:36,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 96 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:01:36,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-12-13 15:01:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2022-12-13 15:01:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-12-13 15:01:36,869 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2022-12-13 15:01:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:36,869 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-12-13 15:01:36,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-12-13 15:01:36,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 15:01:36,870 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:36,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:36,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 15:01:36,871 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:36,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:36,871 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-12-13 15:01:36,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:36,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694084930] [2022-12-13 15:01:36,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:36,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:37,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:37,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694084930] [2022-12-13 15:01:37,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694084930] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:37,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:37,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:01:37,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172224992] [2022-12-13 15:01:37,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:37,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:01:37,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:37,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:01:37,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:01:37,005 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:37,044 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2022-12-13 15:01:37,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:01:37,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 15:01:37,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:37,045 INFO L225 Difference]: With dead ends: 94 [2022-12-13 15:01:37,046 INFO L226 Difference]: Without dead ends: 94 [2022-12-13 15:01:37,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:01:37,047 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 83 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:37,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 90 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:01:37,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-13 15:01:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 61. [2022-12-13 15:01:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-12-13 15:01:37,051 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 9 [2022-12-13 15:01:37,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:37,052 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-12-13 15:01:37,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,052 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-12-13 15:01:37,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 15:01:37,052 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:37,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:37,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 15:01:37,053 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:37,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:37,053 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-12-13 15:01:37,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:37,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592438012] [2022-12-13 15:01:37,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:37,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:37,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:37,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592438012] [2022-12-13 15:01:37,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592438012] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:37,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:37,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:01:37,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684375129] [2022-12-13 15:01:37,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:37,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:01:37,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:37,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:01:37,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:01:37,084 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:37,100 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2022-12-13 15:01:37,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:01:37,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 15:01:37,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:37,102 INFO L225 Difference]: With dead ends: 109 [2022-12-13 15:01:37,102 INFO L226 Difference]: Without dead ends: 109 [2022-12-13 15:01:37,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:01:37,103 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 79 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:37,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 108 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:01:37,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-12-13 15:01:37,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 74. [2022-12-13 15:01:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 73 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2022-12-13 15:01:37,107 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 9 [2022-12-13 15:01:37,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:37,108 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2022-12-13 15:01:37,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,108 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2022-12-13 15:01:37,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 15:01:37,108 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:37,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:37,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 15:01:37,109 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:37,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:37,109 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-12-13 15:01:37,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:37,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106602794] [2022-12-13 15:01:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:37,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:37,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:37,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:37,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106602794] [2022-12-13 15:01:37,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106602794] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:37,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:37,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:01:37,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509184716] [2022-12-13 15:01:37,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:37,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:01:37,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:37,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:01:37,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:01:37,134 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:37,157 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-12-13 15:01:37,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:01:37,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 15:01:37,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:37,158 INFO L225 Difference]: With dead ends: 72 [2022-12-13 15:01:37,158 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 15:01:37,159 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 [2022-12-13 15:01:37,160 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 43 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:37,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:01:37,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 15:01:37,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-12-13 15:01:37,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2022-12-13 15:01:37,163 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 9 [2022-12-13 15:01:37,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:37,163 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2022-12-13 15:01:37,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,164 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2022-12-13 15:01:37,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 15:01:37,164 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:37,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:37,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 15:01:37,164 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:37,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:37,165 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-12-13 15:01:37,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:37,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926130981] [2022-12-13 15:01:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:37,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:37,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:37,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926130981] [2022-12-13 15:01:37,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926130981] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:37,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:37,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 15:01:37,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646019113] [2022-12-13 15:01:37,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:37,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:01:37,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:37,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:01:37,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:01:37,273 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:37,374 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2022-12-13 15:01:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:01:37,375 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 15:01:37,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:37,376 INFO L225 Difference]: With dead ends: 113 [2022-12-13 15:01:37,376 INFO L226 Difference]: Without dead ends: 113 [2022-12-13 15:01:37,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:01:37,376 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 214 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:37,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 86 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:01:37,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-13 15:01:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 76. [2022-12-13 15:01:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 75 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2022-12-13 15:01:37,380 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 9 [2022-12-13 15:01:37,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:37,380 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2022-12-13 15:01:37,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,380 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2022-12-13 15:01:37,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 15:01:37,380 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:37,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:37,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 15:01:37,381 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:37,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:37,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2022-12-13 15:01:37,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:37,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458065180] [2022-12-13 15:01:37,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:37,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:37,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:37,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458065180] [2022-12-13 15:01:37,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458065180] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:37,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:37,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:01:37,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532538012] [2022-12-13 15:01:37,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:37,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:01:37,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:37,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:01:37,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:01:37,496 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:37,568 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2022-12-13 15:01:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:01:37,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 15:01:37,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:37,569 INFO L225 Difference]: With dead ends: 121 [2022-12-13 15:01:37,569 INFO L226 Difference]: Without dead ends: 121 [2022-12-13 15:01:37,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:01:37,570 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 131 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:37,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 64 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:01:37,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-12-13 15:01:37,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2022-12-13 15:01:37,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 75 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2022-12-13 15:01:37,573 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 9 [2022-12-13 15:01:37,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:37,574 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2022-12-13 15:01:37,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,574 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2022-12-13 15:01:37,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 15:01:37,574 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:37,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:37,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 15:01:37,574 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-12-13 15:01:37,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:37,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408403950] [2022-12-13 15:01:37,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:37,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:37,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:37,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408403950] [2022-12-13 15:01:37,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408403950] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:37,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:37,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:01:37,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028254034] [2022-12-13 15:01:37,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:37,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:01:37,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:37,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:01:37,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:01:37,643 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:37,702 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2022-12-13 15:01:37,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:01:37,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 15:01:37,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:37,703 INFO L225 Difference]: With dead ends: 109 [2022-12-13 15:01:37,703 INFO L226 Difference]: Without dead ends: 109 [2022-12-13 15:01:37,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:01:37,704 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 38 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:37,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 114 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:01:37,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-12-13 15:01:37,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 79. [2022-12-13 15:01:37,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.5) internal successors, (96), 78 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-12-13 15:01:37,707 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 10 [2022-12-13 15:01:37,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:37,708 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-12-13 15:01:37,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,708 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-12-13 15:01:37,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 15:01:37,708 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:37,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:37,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 15:01:37,709 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:37,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1890276516, now seen corresponding path program 1 times [2022-12-13 15:01:37,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:37,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396457616] [2022-12-13 15:01:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:37,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:37,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:37,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396457616] [2022-12-13 15:01:37,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396457616] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:37,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:37,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 15:01:37,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433736683] [2022-12-13 15:01:37,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:37,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:01:37,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:37,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:01:37,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:01:37,822 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:37,917 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2022-12-13 15:01:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:01:37,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 15:01:37,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:37,918 INFO L225 Difference]: With dead ends: 115 [2022-12-13 15:01:37,918 INFO L226 Difference]: Without dead ends: 115 [2022-12-13 15:01:37,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:01:37,919 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 201 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:37,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 86 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:01:37,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-13 15:01:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 79. [2022-12-13 15:01:37,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.5) internal successors, (96), 78 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-12-13 15:01:37,921 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 10 [2022-12-13 15:01:37,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:37,922 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-12-13 15:01:37,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:37,922 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-12-13 15:01:37,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 15:01:37,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:37,928 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:37,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 15:01:37,928 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:37,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:37,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-12-13 15:01:37,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:37,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414855327] [2022-12-13 15:01:37,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:37,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:38,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:38,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414855327] [2022-12-13 15:01:38,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414855327] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:38,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287928234] [2022-12-13 15:01:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:38,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:38,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:38,058 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:38,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:01:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:38,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 15:01:38,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:38,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:01:38,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-12-13 15:01:38,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 15:01:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:38,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:38,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:01:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:38,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287928234] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:38,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:38,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-12-13 15:01:38,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327004877] [2022-12-13 15:01:38,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:38,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:01:38,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:38,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:01:38,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:01:38,444 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:38,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:38,750 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2022-12-13 15:01:38,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:01:38,751 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-13 15:01:38,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:38,752 INFO L225 Difference]: With dead ends: 160 [2022-12-13 15:01:38,752 INFO L226 Difference]: Without dead ends: 160 [2022-12-13 15:01:38,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:01:38,752 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 300 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:38,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 383 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:01:38,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-12-13 15:01:38,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 76. [2022-12-13 15:01:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 75 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2022-12-13 15:01:38,755 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 11 [2022-12-13 15:01:38,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:38,755 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2022-12-13 15:01:38,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:38,756 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2022-12-13 15:01:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 15:01:38,756 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:38,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:38,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:01:38,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 15:01:38,957 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:38,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:38,958 INFO L85 PathProgramCache]: Analyzing trace with hash -464624131, now seen corresponding path program 1 times [2022-12-13 15:01:38,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:38,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184729026] [2022-12-13 15:01:38,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:38,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:39,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:39,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184729026] [2022-12-13 15:01:39,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184729026] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:39,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:39,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:01:39,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843590001] [2022-12-13 15:01:39,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:39,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:01:39,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:39,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:01:39,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:01:39,052 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:39,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:39,116 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2022-12-13 15:01:39,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:01:39,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-13 15:01:39,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:39,117 INFO L225 Difference]: With dead ends: 74 [2022-12-13 15:01:39,117 INFO L226 Difference]: Without dead ends: 74 [2022-12-13 15:01:39,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:01:39,118 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 66 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:39,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 52 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:01:39,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-13 15:01:39,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-12-13 15:01:39,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 73 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) [2022-12-13 15:01:39,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2022-12-13 15:01:39,122 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 12 [2022-12-13 15:01:39,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:39,122 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2022-12-13 15:01:39,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:39,122 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2022-12-13 15:01:39,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 15:01:39,123 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:39,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:39,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 15:01:39,123 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:39,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:39,124 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2022-12-13 15:01:39,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:39,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588427496] [2022-12-13 15:01:39,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:39,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:39,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:39,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588427496] [2022-12-13 15:01:39,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588427496] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:39,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:39,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 15:01:39,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525078861] [2022-12-13 15:01:39,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:39,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:01:39,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:39,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:01:39,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:01:39,218 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:39,282 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2022-12-13 15:01:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:01:39,283 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-13 15:01:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:39,283 INFO L225 Difference]: With dead ends: 100 [2022-12-13 15:01:39,283 INFO L226 Difference]: Without dead ends: 100 [2022-12-13 15:01:39,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:01:39,284 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 162 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:39,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 84 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:01:39,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-13 15:01:39,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 77. [2022-12-13 15:01:39,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.4461538461538461) internal successors, (94), 76 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:39,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2022-12-13 15:01:39,288 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 12 [2022-12-13 15:01:39,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:39,288 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2022-12-13 15:01:39,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:39,288 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2022-12-13 15:01:39,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 15:01:39,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:39,289 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:39,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 15:01:39,289 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:39,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:39,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-12-13 15:01:39,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:39,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758314350] [2022-12-13 15:01:39,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:39,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:39,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:39,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758314350] [2022-12-13 15:01:39,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758314350] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:39,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113702608] [2022-12-13 15:01:39,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:39,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:39,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:39,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:39,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:01:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:39,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 15:01:39,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:39,523 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 15:01:39,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-13 15:01:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:39,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:39,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113702608] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:39,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:39,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-12-13 15:01:39,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436961970] [2022-12-13 15:01:39,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:39,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 15:01:39,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:39,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 15:01:39,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:01:39,877 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 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) [2022-12-13 15:01:40,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:40,170 INFO L93 Difference]: Finished difference Result 146 states and 171 transitions. [2022-12-13 15:01:40,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:01:40,171 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-13 15:01:40,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:40,172 INFO L225 Difference]: With dead ends: 146 [2022-12-13 15:01:40,172 INFO L226 Difference]: Without dead ends: 146 [2022-12-13 15:01:40,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:01:40,173 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 183 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:40,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 283 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:01:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-12-13 15:01:40,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 74. [2022-12-13 15:01:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 73 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) [2022-12-13 15:01:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2022-12-13 15:01:40,177 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 13 [2022-12-13 15:01:40,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:40,177 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2022-12-13 15:01:40,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 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) [2022-12-13 15:01:40,178 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2022-12-13 15:01:40,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 15:01:40,178 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:40,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:40,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:01:40,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:40,380 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:40,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:40,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1389200859, now seen corresponding path program 1 times [2022-12-13 15:01:40,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:40,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512752702] [2022-12-13 15:01:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:40,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:40,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:40,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512752702] [2022-12-13 15:01:40,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512752702] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:40,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955355029] [2022-12-13 15:01:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:40,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:40,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:40,653 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:40,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:01:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:40,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 15:01:40,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:40,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:01:40,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-13 15:01:40,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 15:01:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:40,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:40,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:01:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:40,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955355029] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:40,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:01:40,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2022-12-13 15:01:40,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279511728] [2022-12-13 15:01:40,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:40,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:01:40,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:40,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:01:40,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:01:40,913 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:40,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:41,000 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-12-13 15:01:41,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:01:41,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-13 15:01:41,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:41,001 INFO L225 Difference]: With dead ends: 75 [2022-12-13 15:01:41,001 INFO L226 Difference]: Without dead ends: 75 [2022-12-13 15:01:41,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:01:41,002 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 88 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:41,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 54 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:01:41,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-13 15:01:41,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2022-12-13 15:01:41,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.411764705882353) internal successors, (72), 60 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) [2022-12-13 15:01:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2022-12-13 15:01:41,005 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 13 [2022-12-13 15:01:41,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:41,005 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2022-12-13 15:01:41,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2022-12-13 15:01:41,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 15:01:41,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:41,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:41,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:01:41,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 15:01:41,208 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:41,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:41,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1912378887, now seen corresponding path program 1 times [2022-12-13 15:01:41,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:41,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153702476] [2022-12-13 15:01:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:41,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:41,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:41,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153702476] [2022-12-13 15:01:41,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153702476] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:41,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:41,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:01:41,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158026773] [2022-12-13 15:01:41,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:41,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:01:41,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:41,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:01:41,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:01:41,469 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:41,506 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2022-12-13 15:01:41,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:01:41,506 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-13 15:01:41,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:41,507 INFO L225 Difference]: With dead ends: 60 [2022-12-13 15:01:41,507 INFO L226 Difference]: Without dead ends: 60 [2022-12-13 15:01:41,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:01:41,508 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 65 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:41,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 45 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:01:41,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-13 15:01:41,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-12-13 15:01:41,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 56 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) [2022-12-13 15:01:41,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-12-13 15:01:41,510 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 14 [2022-12-13 15:01:41,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:41,510 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-12-13 15:01:41,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:41,510 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-12-13 15:01:41,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 15:01:41,511 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:41,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:41,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 15:01:41,511 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:41,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:41,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1433224404, now seen corresponding path program 1 times [2022-12-13 15:01:41,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:41,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483317842] [2022-12-13 15:01:41,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:41,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:41,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:41,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483317842] [2022-12-13 15:01:41,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483317842] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:41,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:41,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:01:41,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655149226] [2022-12-13 15:01:41,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:41,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:01:41,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:41,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:01:41,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:01:41,601 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:41,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:41,623 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-12-13 15:01:41,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:01:41,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-13 15:01:41,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:41,624 INFO L225 Difference]: With dead ends: 56 [2022-12-13 15:01:41,624 INFO L226 Difference]: Without dead ends: 53 [2022-12-13 15:01:41,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:01:41,624 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:41,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 66 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:01:41,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-13 15:01:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-12-13 15:01:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:41,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-12-13 15:01:41,627 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2022-12-13 15:01:41,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:41,627 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-12-13 15:01:41,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:41,627 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-12-13 15:01:41,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 15:01:41,628 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:41,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:41,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 15:01:41,628 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:41,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:41,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207485, now seen corresponding path program 1 times [2022-12-13 15:01:41,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:41,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253322235] [2022-12-13 15:01:41,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:41,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:41,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:41,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253322235] [2022-12-13 15:01:41,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253322235] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:41,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:41,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:01:41,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538001377] [2022-12-13 15:01:41,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:41,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:01:41,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:41,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:01:41,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:01:41,674 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:41,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:41,709 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-12-13 15:01:41,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:01:41,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-13 15:01:41,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:41,710 INFO L225 Difference]: With dead ends: 50 [2022-12-13 15:01:41,710 INFO L226 Difference]: Without dead ends: 50 [2022-12-13 15:01:41,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:01:41,711 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 68 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:41,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 56 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:01:41,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-13 15:01:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-12-13 15:01:41,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-12-13 15:01:41,713 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2022-12-13 15:01:41,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:41,713 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-12-13 15:01:41,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:41,713 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-12-13 15:01:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 15:01:41,714 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:41,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:41,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 15:01:41,714 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:41,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:41,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207484, now seen corresponding path program 1 times [2022-12-13 15:01:41,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:41,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112917995] [2022-12-13 15:01:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:41,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:41,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:41,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112917995] [2022-12-13 15:01:41,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112917995] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:41,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:41,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:01:41,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133810896] [2022-12-13 15:01:41,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:41,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:01:41,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:41,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:01:41,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:01:41,843 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:41,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:41,930 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-12-13 15:01:41,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:01:41,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-13 15:01:41,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:41,932 INFO L225 Difference]: With dead ends: 66 [2022-12-13 15:01:41,932 INFO L226 Difference]: Without dead ends: 66 [2022-12-13 15:01:41,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:01:41,932 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 166 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:41,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 67 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:01:41,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-13 15:01:41,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2022-12-13 15:01:41,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 56 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) [2022-12-13 15:01:41,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-12-13 15:01:41,935 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 16 [2022-12-13 15:01:41,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:41,935 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-12-13 15:01:41,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:41,935 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-12-13 15:01:41,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 15:01:41,935 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:41,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:41,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 15:01:41,936 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:41,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:41,936 INFO L85 PathProgramCache]: Analyzing trace with hash 43271131, now seen corresponding path program 1 times [2022-12-13 15:01:41,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:41,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312835705] [2022-12-13 15:01:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:41,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:41,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:41,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312835705] [2022-12-13 15:01:41,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312835705] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:41,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:41,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:01:41,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741821393] [2022-12-13 15:01:41,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:41,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:01:41,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:41,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:01:41,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:01:41,961 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:41,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:41,967 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-12-13 15:01:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:01:41,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-13 15:01:41,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:41,968 INFO L225 Difference]: With dead ends: 59 [2022-12-13 15:01:41,968 INFO L226 Difference]: Without dead ends: 59 [2022-12-13 15:01:41,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:01:41,969 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:41,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:01:41,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-13 15:01:41,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-12-13 15:01:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-12-13 15:01:41,971 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 20 [2022-12-13 15:01:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:41,971 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-12-13 15:01:41,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-12-13 15:01:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 15:01:41,972 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:41,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:41,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 15:01:41,972 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:41,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:41,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1371974184, now seen corresponding path program 1 times [2022-12-13 15:01:41,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:41,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795611774] [2022-12-13 15:01:41,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:41,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:42,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:42,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795611774] [2022-12-13 15:01:42,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795611774] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:42,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:42,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:01:42,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488994946] [2022-12-13 15:01:42,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:42,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:01:42,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:42,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:01:42,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:01:42,179 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:42,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:42,242 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2022-12-13 15:01:42,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:01:42,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-13 15:01:42,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:42,243 INFO L225 Difference]: With dead ends: 71 [2022-12-13 15:01:42,243 INFO L226 Difference]: Without dead ends: 54 [2022-12-13 15:01:42,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:01:42,244 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:42,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 185 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:01:42,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-13 15:01:42,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-12-13 15:01:42,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:42,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-12-13 15:01:42,246 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 22 [2022-12-13 15:01:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:42,246 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-12-13 15:01:42,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-12-13 15:01:42,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 15:01:42,247 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:42,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:42,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 15:01:42,247 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:42,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:42,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2105344662, now seen corresponding path program 1 times [2022-12-13 15:01:42,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:42,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481658242] [2022-12-13 15:01:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:42,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:42,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:42,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481658242] [2022-12-13 15:01:42,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481658242] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:42,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:42,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 15:01:42,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601027377] [2022-12-13 15:01:42,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:42,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:01:42,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:42,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:01:42,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:01:42,442 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:42,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:42,514 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-12-13 15:01:42,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:01:42,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-13 15:01:42,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:42,515 INFO L225 Difference]: With dead ends: 74 [2022-12-13 15:01:42,515 INFO L226 Difference]: Without dead ends: 62 [2022-12-13 15:01:42,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:01:42,516 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 50 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:42,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 166 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:01:42,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-13 15:01:42,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2022-12-13 15:01:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:42,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-12-13 15:01:42,518 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 22 [2022-12-13 15:01:42,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:42,518 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-12-13 15:01:42,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:42,519 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-12-13 15:01:42,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 15:01:42,519 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:42,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:42,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 15:01:42,519 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:42,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:42,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1877695219, now seen corresponding path program 1 times [2022-12-13 15:01:42,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:42,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790842322] [2022-12-13 15:01:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:42,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:42,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:42,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790842322] [2022-12-13 15:01:42,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790842322] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:42,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:42,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 15:01:42,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230992086] [2022-12-13 15:01:42,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:42,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 15:01:42,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:42,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 15:01:42,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:01:42,679 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2022-12-13 15:01:42,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:42,779 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2022-12-13 15:01:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:01:42,779 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-13 15:01:42,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:42,780 INFO L225 Difference]: With dead ends: 75 [2022-12-13 15:01:42,780 INFO L226 Difference]: Without dead ends: 75 [2022-12-13 15:01:42,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:01:42,780 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 54 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:42,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 217 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:01:42,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-13 15:01:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-12-13 15:01:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:42,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-12-13 15:01:42,783 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 26 [2022-12-13 15:01:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:42,783 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-12-13 15:01:42,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2022-12-13 15:01:42,783 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-12-13 15:01:42,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 15:01:42,783 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:42,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:42,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 15:01:42,784 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:42,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:42,784 INFO L85 PathProgramCache]: Analyzing trace with hash 72256885, now seen corresponding path program 1 times [2022-12-13 15:01:42,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:42,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194706215] [2022-12-13 15:01:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:42,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:42,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:42,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194706215] [2022-12-13 15:01:42,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194706215] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:42,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:42,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 15:01:42,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128941517] [2022-12-13 15:01:42,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:42,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 15:01:42,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:42,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 15:01:42,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:01:42,987 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-12-13 15:01:43,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:43,112 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2022-12-13 15:01:43,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:01:43,112 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-13 15:01:43,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:43,112 INFO L225 Difference]: With dead ends: 96 [2022-12-13 15:01:43,112 INFO L226 Difference]: Without dead ends: 96 [2022-12-13 15:01:43,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-12-13 15:01:43,113 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 102 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:43,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 174 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:01:43,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-13 15:01:43,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2022-12-13 15:01:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-12-13 15:01:43,114 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 26 [2022-12-13 15:01:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:43,115 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-12-13 15:01:43,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-12-13 15:01:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-12-13 15:01:43,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 15:01:43,115 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:43,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:43,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 15:01:43,115 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:43,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:43,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1740534735, now seen corresponding path program 1 times [2022-12-13 15:01:43,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:43,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115727350] [2022-12-13 15:01:43,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:43,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:43,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:43,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115727350] [2022-12-13 15:01:43,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115727350] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:43,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:43,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 15:01:43,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455584883] [2022-12-13 15:01:43,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:43,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:01:43,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:43,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:01:43,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:01:43,186 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:43,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:43,319 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-12-13 15:01:43,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:01:43,319 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-13 15:01:43,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:43,319 INFO L225 Difference]: With dead ends: 75 [2022-12-13 15:01:43,320 INFO L226 Difference]: Without dead ends: 51 [2022-12-13 15:01:43,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:01:43,320 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:43,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 174 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:01:43,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-13 15:01:43,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-12-13 15:01:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 48 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) [2022-12-13 15:01:43,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-12-13 15:01:43,321 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 27 [2022-12-13 15:01:43,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:43,321 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-12-13 15:01:43,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:43,322 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-12-13 15:01:43,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 15:01:43,322 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:43,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:43,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 15:01:43,322 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:43,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:43,322 INFO L85 PathProgramCache]: Analyzing trace with hash -145898734, now seen corresponding path program 1 times [2022-12-13 15:01:43,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:43,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905180716] [2022-12-13 15:01:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:43,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:43,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:43,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905180716] [2022-12-13 15:01:43,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905180716] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:43,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432042503] [2022-12-13 15:01:43,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:43,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:43,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:43,472 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:43,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:01:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:43,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 15:01:43,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:43,541 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 15:01:43,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 15:01:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:43,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:43,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432042503] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:43,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:43,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2022-12-13 15:01:43,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155564399] [2022-12-13 15:01:43,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:43,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 15:01:43,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:43,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 15:01:43,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:01:43,780 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 23 states, 22 states have (on average 3.409090909090909) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:44,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:44,000 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-12-13 15:01:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:01:44,001 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.409090909090909) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-13 15:01:44,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:44,001 INFO L225 Difference]: With dead ends: 69 [2022-12-13 15:01:44,001 INFO L226 Difference]: Without dead ends: 65 [2022-12-13 15:01:44,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2022-12-13 15:01:44,002 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 259 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:44,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 234 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:01:44,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-13 15:01:44,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2022-12-13 15:01:44,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-12-13 15:01:44,004 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 30 [2022-12-13 15:01:44,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:44,004 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-12-13 15:01:44,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.409090909090909) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:44,004 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-12-13 15:01:44,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 15:01:44,005 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:44,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:44,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 15:01:44,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 15:01:44,205 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:44,206 INFO L85 PathProgramCache]: Analyzing trace with hash 36573013, now seen corresponding path program 1 times [2022-12-13 15:01:44,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:44,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933591194] [2022-12-13 15:01:44,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:44,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:44,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:44,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933591194] [2022-12-13 15:01:44,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933591194] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:44,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977101519] [2022-12-13 15:01:44,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:44,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:44,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:44,337 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:44,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 15:01:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:44,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 15:01:44,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:44,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:44,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 15:01:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:44,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977101519] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:44,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:44,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 15:01:44,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563715162] [2022-12-13 15:01:44,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:44,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 15:01:44,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:44,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 15:01:44,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-12-13 15:01:44,608 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:44,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:44,716 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2022-12-13 15:01:44,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:01:44,716 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-13 15:01:44,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:44,716 INFO L225 Difference]: With dead ends: 86 [2022-12-13 15:01:44,716 INFO L226 Difference]: Without dead ends: 86 [2022-12-13 15:01:44,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-12-13 15:01:44,717 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 237 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:44,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 159 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:01:44,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-12-13 15:01:44,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2022-12-13 15:01:44,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 60 states have (on average 1.15) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:44,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2022-12-13 15:01:44,718 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 33 [2022-12-13 15:01:44,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:44,719 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2022-12-13 15:01:44,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:44,719 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2022-12-13 15:01:44,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 15:01:44,719 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:44,719 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:44,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 15:01:44,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 15:01:44,921 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:44,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:44,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1001387738, now seen corresponding path program 2 times [2022-12-13 15:01:44,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:44,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466653790] [2022-12-13 15:01:44,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:44,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:45,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:45,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466653790] [2022-12-13 15:01:45,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466653790] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:45,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479051189] [2022-12-13 15:01:45,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:01:45,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:45,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:45,305 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:45,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 15:01:45,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:01:45,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:45,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 15:01:45,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:45,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 15:01:45,913 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-13 15:01:45,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2022-12-13 15:01:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:45,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:46,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 15:01:46,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-13 15:01:46,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-12-13 15:01:46,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:46,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479051189] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:46,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:46,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2022-12-13 15:01:46,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112722183] [2022-12-13 15:01:46,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:46,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 15:01:46,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:46,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 15:01:46,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 15:01:46,436 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:56,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:01:56,624 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2022-12-13 15:01:56,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 15:01:56,624 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-13 15:01:56,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:01:56,625 INFO L225 Difference]: With dead ends: 135 [2022-12-13 15:01:56,625 INFO L226 Difference]: Without dead ends: 129 [2022-12-13 15:01:56,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=713, Invalid=2946, Unknown=1, NotChecked=0, Total=3660 [2022-12-13 15:01:56,626 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 415 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:01:56,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 379 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 15:01:56,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-13 15:01:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2022-12-13 15:01:56,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0875) internal successors, (87), 80 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2022-12-13 15:01:56,629 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 36 [2022-12-13 15:01:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:01:56,629 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2022-12-13 15:01:56,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:56,630 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2022-12-13 15:01:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 15:01:56,630 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:01:56,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:56,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 15:01:56,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 15:01:56,832 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:01:56,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:56,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1930803928, now seen corresponding path program 2 times [2022-12-13 15:01:56,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:56,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408979020] [2022-12-13 15:01:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:56,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:57,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:57,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408979020] [2022-12-13 15:01:57,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408979020] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:57,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436430321] [2022-12-13 15:01:57,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:01:57,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:57,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:57,212 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:57,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 15:01:57,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:01:57,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:57,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 77 conjunts are in the unsatisfiable core [2022-12-13 15:01:57,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:57,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 15:01:57,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 15:01:57,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 15:01:58,312 INFO L321 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-12-13 15:01:58,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 20 [2022-12-13 15:01:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:58,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:58,778 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_335 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_335) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse2 (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) (.cse1 (select v_ArrVal_335 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) .cse1)) (= .cse2 0) (not (= .cse2 .cse1)))))) is different from false [2022-12-13 15:01:58,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:01:58,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 50 [2022-12-13 15:01:58,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:01:58,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 88 [2022-12-13 15:01:58,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:01:58,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 62 [2022-12-13 15:01:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:59,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436430321] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:59,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:59,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19, 20] total 45 [2022-12-13 15:01:59,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802170746] [2022-12-13 15:01:59,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:59,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-13 15:01:59,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:59,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-13 15:01:59,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1721, Unknown=1, NotChecked=84, Total=1980 [2022-12-13 15:01:59,053 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:02:00,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:02:00,500 INFO L93 Difference]: Finished difference Result 145 states and 153 transitions. [2022-12-13 15:02:00,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 15:02:00,501 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 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 46 [2022-12-13 15:02:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:02:00,501 INFO L225 Difference]: With dead ends: 145 [2022-12-13 15:02:00,501 INFO L226 Difference]: Without dead ends: 88 [2022-12-13 15:02:00,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=532, Invalid=3131, Unknown=1, NotChecked=118, Total=3782 [2022-12-13 15:02:00,504 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 272 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:02:00,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 418 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 473 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-12-13 15:02:00,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-13 15:02:00,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2022-12-13 15:02:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:02:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2022-12-13 15:02:00,505 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 46 [2022-12-13 15:02:00,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:02:00,505 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2022-12-13 15:02:00,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:02:00,506 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2022-12-13 15:02:00,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 15:02:00,506 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:02:00,506 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:00,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 15:02:00,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 15:02:00,708 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:02:00,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:00,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1006205749, now seen corresponding path program 3 times [2022-12-13 15:02:00,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:00,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393926564] [2022-12-13 15:02:00,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:00,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:00,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:00,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393926564] [2022-12-13 15:02:00,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393926564] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:00,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109538627] [2022-12-13 15:02:00,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:02:00,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:00,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:00,926 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:00,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 15:02:01,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:02:01,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:01,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 15:02:01,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:01,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:01,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-13 15:02:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:01,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109538627] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:01,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:01,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-12-13 15:02:01,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837652203] [2022-12-13 15:02:01,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:01,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 15:02:01,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:01,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 15:02:01,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-12-13 15:02:01,406 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:02:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:02:01,559 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2022-12-13 15:02:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:02:01,559 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 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 50 [2022-12-13 15:02:01,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:02:01,560 INFO L225 Difference]: With dead ends: 135 [2022-12-13 15:02:01,560 INFO L226 Difference]: Without dead ends: 135 [2022-12-13 15:02:01,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2022-12-13 15:02:01,561 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 290 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:02:01,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 223 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:02:01,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-13 15:02:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 111. [2022-12-13 15:02:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 110 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:02:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 118 transitions. [2022-12-13 15:02:01,564 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 118 transitions. Word has length 50 [2022-12-13 15:02:01,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:02:01,564 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 118 transitions. [2022-12-13 15:02:01,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:02:01,565 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 118 transitions. [2022-12-13 15:02:01,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 15:02:01,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:02:01,565 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:01,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 15:02:01,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:01,767 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:02:01,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:01,768 INFO L85 PathProgramCache]: Analyzing trace with hash 276863736, now seen corresponding path program 4 times [2022-12-13 15:02:01,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:01,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936487536] [2022-12-13 15:02:01,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:01,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:03,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:03,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936487536] [2022-12-13 15:02:03,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936487536] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:03,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14629970] [2022-12-13 15:02:03,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:02:03,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:03,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:03,315 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:03,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 15:02:03,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:02:03,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:03,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-13 15:02:03,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:03,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 15:02:03,493 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-13 15:02:03,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 15:02:06,242 INFO L321 Elim1Store]: treesize reduction 65, result has 59.1 percent of original size [2022-12-13 15:02:06,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 69 treesize of output 116 [2022-12-13 15:02:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 15:02:06,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:13,011 INFO L321 Elim1Store]: treesize reduction 79, result has 33.6 percent of original size [2022-12-13 15:02:13,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 543 treesize of output 423 [2022-12-13 15:02:13,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:13,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 411 treesize of output 385 [2022-12-13 15:02:13,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 15:02:13,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:02:13,097 INFO L321 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-12-13 15:02:13,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 55 [2022-12-13 15:02:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 15:02:13,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14629970] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:13,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:13,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 77 [2022-12-13 15:02:13,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419638819] [2022-12-13 15:02:13,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:13,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-13 15:02:13,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:13,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-13 15:02:13,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=5371, Unknown=2, NotChecked=0, Total=5852 [2022-12-13 15:02:13,144 INFO L87 Difference]: Start difference. First operand 111 states and 118 transitions. Second operand has 77 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:03:15,404 INFO L93 Difference]: Finished difference Result 592 states and 637 transitions. [2022-12-13 15:03:15,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-12-13 15:03:15,405 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 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 63 [2022-12-13 15:03:15,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:03:15,407 INFO L225 Difference]: With dead ends: 592 [2022-12-13 15:03:15,407 INFO L226 Difference]: Without dead ends: 496 [2022-12-13 15:03:15,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23174 ImplicationChecksByTransitivity, 67.6s TimeCoverageRelationStatistics Valid=11677, Invalid=62577, Unknown=2, NotChecked=0, Total=74256 [2022-12-13 15:03:15,415 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1824 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 3233 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1824 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 3233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:03:15,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1824 Valid, 550 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 3233 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-13 15:03:15,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-12-13 15:03:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 165. [2022-12-13 15:03:15,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.103658536585366) internal successors, (181), 164 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:15,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 181 transitions. [2022-12-13 15:03:15,420 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 181 transitions. Word has length 63 [2022-12-13 15:03:15,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:03:15,420 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 181 transitions. [2022-12-13 15:03:15,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 181 transitions. [2022-12-13 15:03:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-13 15:03:15,420 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:03:15,420 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:03:15,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 15:03:15,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:15,621 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:03:15,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:15,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2120159335, now seen corresponding path program 1 times [2022-12-13 15:03:15,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:03:15,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611162799] [2022-12-13 15:03:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:15,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:03:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:03:15,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:03:15,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611162799] [2022-12-13 15:03:15,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611162799] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:03:15,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592739335] [2022-12-13 15:03:15,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:15,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:15,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:03:15,999 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:03:16,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 15:03:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:16,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 15:03:16,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:16,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 15:03:16,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 15:03:16,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 15:03:16,651 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-12-13 15:03:16,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2022-12-13 15:03:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 15:03:16,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:03:16,996 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_437 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_437) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-12-13 15:03:17,002 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:03:17,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-13 15:03:17,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:03:17,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-13 15:03:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 15:03:17,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592739335] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:03:17,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:03:17,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 37 [2022-12-13 15:03:17,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496339906] [2022-12-13 15:03:17,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:03:17,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 15:03:17,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:03:17,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 15:03:17,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1145, Unknown=1, NotChecked=68, Total=1332 [2022-12-13 15:03:17,156 INFO L87 Difference]: Start difference. First operand 165 states and 181 transitions. Second operand has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:03:17,731 INFO L93 Difference]: Finished difference Result 272 states and 293 transitions. [2022-12-13 15:03:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:03:17,731 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 0 states have call successors, (0), 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 73 [2022-12-13 15:03:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:03:17,732 INFO L225 Difference]: With dead ends: 272 [2022-12-13 15:03:17,733 INFO L226 Difference]: Without dead ends: 172 [2022-12-13 15:03:17,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=1746, Unknown=1, NotChecked=86, Total=2070 [2022-12-13 15:03:17,733 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 156 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:03:17,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 563 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 570 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-12-13 15:03:17,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-12-13 15:03:17,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2022-12-13 15:03:17,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.1011904761904763) internal successors, (185), 168 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:17,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 185 transitions. [2022-12-13 15:03:17,737 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 185 transitions. Word has length 73 [2022-12-13 15:03:17,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:03:17,737 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 185 transitions. [2022-12-13 15:03:17,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:17,737 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 185 transitions. [2022-12-13 15:03:17,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-13 15:03:17,737 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:03:17,737 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:03:17,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 15:03:17,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 15:03:17,939 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:03:17,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:17,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2129461782, now seen corresponding path program 2 times [2022-12-13 15:03:17,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:03:17,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715835040] [2022-12-13 15:03:17,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:17,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:03:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:03:18,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:03:18,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715835040] [2022-12-13 15:03:18,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715835040] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:03:18,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322819554] [2022-12-13 15:03:18,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:03:18,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:18,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:03:18,219 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:03:18,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 15:03:18,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:03:18,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:03:18,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 15:03:18,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:03:18,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:03:18,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 15:03:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:03:18,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322819554] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:03:18,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:03:18,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2022-12-13 15:03:18,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834825624] [2022-12-13 15:03:18,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:03:18,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:03:18,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:03:18,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:03:18,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:03:18,824 INFO L87 Difference]: Start difference. First operand 169 states and 185 transitions. Second operand has 24 states, 23 states have (on average 6.434782608695652) internal successors, (148), 24 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:19,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:03:19,083 INFO L93 Difference]: Finished difference Result 296 states and 322 transitions. [2022-12-13 15:03:19,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:03:19,083 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.434782608695652) internal successors, (148), 24 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-12-13 15:03:19,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:03:19,084 INFO L225 Difference]: With dead ends: 296 [2022-12-13 15:03:19,084 INFO L226 Difference]: Without dead ends: 296 [2022-12-13 15:03:19,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2022-12-13 15:03:19,085 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 332 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:03:19,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 368 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:03:19,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-12-13 15:03:19,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 195. [2022-12-13 15:03:19,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.097938144329897) internal successors, (213), 194 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:19,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 213 transitions. [2022-12-13 15:03:19,088 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 213 transitions. Word has length 77 [2022-12-13 15:03:19,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:03:19,088 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 213 transitions. [2022-12-13 15:03:19,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.434782608695652) internal successors, (148), 24 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:19,088 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 213 transitions. [2022-12-13 15:03:19,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-13 15:03:19,088 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:03:19,088 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:03:19,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 15:03:19,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:19,290 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:03:19,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:19,291 INFO L85 PathProgramCache]: Analyzing trace with hash 318466939, now seen corresponding path program 3 times [2022-12-13 15:03:19,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:03:19,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275817270] [2022-12-13 15:03:19,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:19,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:03:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:03:20,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:03:20,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275817270] [2022-12-13 15:03:20,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275817270] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:03:20,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605335297] [2022-12-13 15:03:20,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:03:20,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:20,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:03:20,664 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:03:20,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 15:03:20,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 15:03:20,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:03:20,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 15:03:20,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:20,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 15:03:21,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 15:03:21,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 15:03:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:03:21,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:03:21,609 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_517 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_517) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-12-13 15:03:21,613 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:03:21,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-13 15:03:21,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:03:21,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-13 15:03:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 10 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 15:03:21,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605335297] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:03:21,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:03:21,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 19] total 39 [2022-12-13 15:03:21,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945249907] [2022-12-13 15:03:21,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:03:21,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 15:03:21,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:03:21,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 15:03:21,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1309, Unknown=1, NotChecked=72, Total=1482 [2022-12-13 15:03:21,837 INFO L87 Difference]: Start difference. First operand 195 states and 213 transitions. Second operand has 39 states, 39 states have (on average 4.102564102564102) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:24,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:03:24,915 INFO L93 Difference]: Finished difference Result 451 states and 482 transitions. [2022-12-13 15:03:24,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 15:03:24,916 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.102564102564102) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 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 90 [2022-12-13 15:03:24,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:03:24,916 INFO L225 Difference]: With dead ends: 451 [2022-12-13 15:03:24,916 INFO L226 Difference]: Without dead ends: 202 [2022-12-13 15:03:24,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 158 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=502, Invalid=3657, Unknown=5, NotChecked=126, Total=4290 [2022-12-13 15:03:24,917 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1038 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 5 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 15:03:24,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1038 Valid, 829 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1106 Invalid, 24 Unknown, 100 Unchecked, 0.7s Time] [2022-12-13 15:03:24,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-12-13 15:03:24,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2022-12-13 15:03:24,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.095959595959596) internal successors, (217), 198 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:24,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 217 transitions. [2022-12-13 15:03:24,920 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 217 transitions. Word has length 90 [2022-12-13 15:03:24,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:03:24,920 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 217 transitions. [2022-12-13 15:03:24,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.102564102564102) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:24,920 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 217 transitions. [2022-12-13 15:03:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-13 15:03:24,920 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:03:24,920 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:03:24,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 15:03:25,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:25,121 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:03:25,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:25,121 INFO L85 PathProgramCache]: Analyzing trace with hash 296080472, now seen corresponding path program 4 times [2022-12-13 15:03:25,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:03:25,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114118610] [2022-12-13 15:03:25,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:25,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:03:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:03:25,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:03:25,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114118610] [2022-12-13 15:03:25,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114118610] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:03:25,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626962623] [2022-12-13 15:03:25,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:03:25,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:25,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:03:25,400 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:03:25,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 15:03:25,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:03:25,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:03:25,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 98 conjunts are in the unsatisfiable core [2022-12-13 15:03:25,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:25,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 15:03:25,550 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-13 15:03:25,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 15:03:28,980 INFO L321 Elim1Store]: treesize reduction 92, result has 69.0 percent of original size [2022-12-13 15:03:28,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 92 treesize of output 234 [2022-12-13 15:03:29,318 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 15:03:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-13 15:03:30,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:03:36,075 INFO L321 Elim1Store]: treesize reduction 189, result has 23.5 percent of original size [2022-12-13 15:03:36,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 979 treesize of output 840 [2022-12-13 15:03:36,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:03:36,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 738 treesize of output 710 [2022-12-13 15:03:36,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 15:03:36,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 298 [2022-12-13 15:03:36,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 426 treesize of output 402 [2022-12-13 15:03:36,682 INFO L321 Elim1Store]: treesize reduction 15, result has 82.8 percent of original size [2022-12-13 15:03:36,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 154 treesize of output 174 [2022-12-13 15:03:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-13 15:03:36,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626962623] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:03:36,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:03:36,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 32, 32] total 71 [2022-12-13 15:03:36,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333236148] [2022-12-13 15:03:36,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:03:36,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-12-13 15:03:36,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:03:36,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-12-13 15:03:36,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=4544, Unknown=1, NotChecked=0, Total=5112 [2022-12-13 15:03:36,998 INFO L87 Difference]: Start difference. First operand 199 states and 217 transitions. Second operand has 72 states, 71 states have (on average 3.112676056338028) internal successors, (221), 72 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:08,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:04:08,576 INFO L93 Difference]: Finished difference Result 436 states and 473 transitions. [2022-12-13 15:04:08,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-12-13 15:04:08,577 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 3.112676056338028) internal successors, (221), 72 states have internal predecessors, (221), 0 states have call successors, (0), 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 94 [2022-12-13 15:04:08,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:04:08,578 INFO L225 Difference]: With dead ends: 436 [2022-12-13 15:04:08,578 INFO L226 Difference]: Without dead ends: 436 [2022-12-13 15:04:08,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10334 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=7164, Invalid=30665, Unknown=1, NotChecked=0, Total=37830 [2022-12-13 15:04:08,580 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 3090 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 2683 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3090 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:04:08,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3090 Valid, 897 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2683 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-13 15:04:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-12-13 15:04:08,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 185. [2022-12-13 15:04:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0869565217391304) internal successors, (200), 184 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:08,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 200 transitions. [2022-12-13 15:04:08,582 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 200 transitions. Word has length 94 [2022-12-13 15:04:08,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:04:08,582 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 200 transitions. [2022-12-13 15:04:08,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 3.112676056338028) internal successors, (221), 72 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:08,583 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 200 transitions. [2022-12-13 15:04:08,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-13 15:04:08,583 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:04:08,583 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:04:08,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 15:04:08,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 15:04:08,784 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:04:08,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:08,785 INFO L85 PathProgramCache]: Analyzing trace with hash 460696013, now seen corresponding path program 5 times [2022-12-13 15:04:08,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:04:08,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991917857] [2022-12-13 15:04:08,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:08,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:04:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 9 proven. 184 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:04:10,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:04:10,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991917857] [2022-12-13 15:04:10,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991917857] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:04:10,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319640933] [2022-12-13 15:04:10,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:04:10,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:10,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:04:10,434 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:04:10,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 15:04:10,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-13 15:04:10,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:04:10,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-13 15:04:10,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:10,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 15:04:10,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 15:04:10,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 15:04:12,958 INFO L321 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-12-13 15:04:12,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 20 [2022-12-13 15:04:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 9 proven. 178 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:04:13,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:04:13,834 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:13,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2022-12-13 15:04:13,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:13,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 73 [2022-12-13 15:04:13,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:13,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 60 [2022-12-13 15:04:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 40 proven. 147 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:04:14,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319640933] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:04:14,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:04:14,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 27, 28] total 78 [2022-12-13 15:04:14,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465998025] [2022-12-13 15:04:14,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:04:14,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-12-13 15:04:14,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:04:14,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-12-13 15:04:14,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=5647, Unknown=19, NotChecked=0, Total=6006 [2022-12-13 15:04:14,434 INFO L87 Difference]: Start difference. First operand 185 states and 200 transitions. Second operand has 78 states, 78 states have (on average 3.1794871794871793) internal successors, (248), 78 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:19,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:04:19,431 INFO L93 Difference]: Finished difference Result 655 states and 705 transitions. [2022-12-13 15:04:19,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-13 15:04:19,432 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.1794871794871793) internal successors, (248), 78 states have internal predecessors, (248), 0 states have call successors, (0), 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 107 [2022-12-13 15:04:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:04:19,435 INFO L225 Difference]: With dead ends: 655 [2022-12-13 15:04:19,435 INFO L226 Difference]: Without dead ends: 643 [2022-12-13 15:04:19,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3009 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1362, Invalid=13139, Unknown=19, NotChecked=0, Total=14520 [2022-12-13 15:04:19,436 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1708 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 2875 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1708 SdHoareTripleChecker+Valid, 1425 SdHoareTripleChecker+Invalid, 2883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:04:19,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1708 Valid, 1425 Invalid, 2883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2875 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-13 15:04:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-12-13 15:04:19,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 525. [2022-12-13 15:04:19,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.0858778625954197) internal successors, (569), 524 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:19,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 569 transitions. [2022-12-13 15:04:19,447 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 569 transitions. Word has length 107 [2022-12-13 15:04:19,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:04:19,447 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 569 transitions. [2022-12-13 15:04:19,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.1794871794871793) internal successors, (248), 78 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:19,448 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 569 transitions. [2022-12-13 15:04:19,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-13 15:04:19,449 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:04:19,449 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:04:19,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 15:04:19,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 15:04:19,650 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:04:19,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:19,650 INFO L85 PathProgramCache]: Analyzing trace with hash -69699952, now seen corresponding path program 6 times [2022-12-13 15:04:19,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:04:19,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162922006] [2022-12-13 15:04:19,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:19,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:04:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 15 proven. 189 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:04:19,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:04:19,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162922006] [2022-12-13 15:04:19,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162922006] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:04:19,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912782777] [2022-12-13 15:04:19,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:04:19,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:19,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:04:19,991 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:04:19,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 15:04:20,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-13 15:04:20,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:04:20,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 15:04:20,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 28 proven. 176 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:04:20,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:04:20,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-13 15:04:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 28 proven. 176 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:04:20,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912782777] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:04:20,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:04:20,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-12-13 15:04:20,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446279649] [2022-12-13 15:04:20,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:04:20,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 15:04:20,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:04:20,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 15:04:20,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 15:04:20,852 INFO L87 Difference]: Start difference. First operand 525 states and 569 transitions. Second operand has 37 states, 36 states have (on average 7.5) internal successors, (270), 37 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:04:21,335 INFO L93 Difference]: Finished difference Result 829 states and 897 transitions. [2022-12-13 15:04:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 15:04:21,336 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 7.5) internal successors, (270), 37 states have internal predecessors, (270), 0 states have call successors, (0), 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 111 [2022-12-13 15:04:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:04:21,337 INFO L225 Difference]: With dead ends: 829 [2022-12-13 15:04:21,337 INFO L226 Difference]: Without dead ends: 829 [2022-12-13 15:04:21,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 193 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=438, Invalid=1724, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 15:04:21,337 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 566 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:04:21,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 658 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 15:04:21,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-12-13 15:04:21,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 551. [2022-12-13 15:04:21,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 1.0854545454545454) internal successors, (597), 550 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 597 transitions. [2022-12-13 15:04:21,343 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 597 transitions. Word has length 111 [2022-12-13 15:04:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:04:21,343 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 597 transitions. [2022-12-13 15:04:21,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 7.5) internal successors, (270), 37 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:21,344 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 597 transitions. [2022-12-13 15:04:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-13 15:04:21,345 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:04:21,345 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:04:21,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 15:04:21,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 15:04:21,546 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:04:21,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:21,546 INFO L85 PathProgramCache]: Analyzing trace with hash 828309817, now seen corresponding path program 7 times [2022-12-13 15:04:21,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:04:21,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251962998] [2022-12-13 15:04:21,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:21,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:04:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 85 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 15:04:22,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:04:22,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251962998] [2022-12-13 15:04:22,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251962998] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:04:22,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518960087] [2022-12-13 15:04:22,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:04:22,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:22,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:04:22,068 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:04:22,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 15:04:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:22,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 100 conjunts are in the unsatisfiable core [2022-12-13 15:04:22,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:22,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 15:04:22,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 15:04:22,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 15:04:25,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:04:25,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:04:25,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 17 [2022-12-13 15:04:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 9 proven. 220 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:04:25,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:04:27,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:27,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2022-12-13 15:04:27,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:27,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 87 [2022-12-13 15:04:27,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:27,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 60 [2022-12-13 15:04:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 27 proven. 202 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:04:28,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518960087] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:04:28,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:04:28,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 30, 31] total 73 [2022-12-13 15:04:28,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923727470] [2022-12-13 15:04:28,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:04:28,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-13 15:04:28,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:04:28,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-13 15:04:28,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=4919, Unknown=7, NotChecked=0, Total=5256 [2022-12-13 15:04:28,748 INFO L87 Difference]: Start difference. First operand 551 states and 597 transitions. Second operand has 73 states, 73 states have (on average 4.178082191780822) internal successors, (305), 73 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:04:33,514 INFO L93 Difference]: Finished difference Result 561 states and 598 transitions. [2022-12-13 15:04:33,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 15:04:33,514 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.178082191780822) internal successors, (305), 73 states have internal predecessors, (305), 0 states have call successors, (0), 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 113 [2022-12-13 15:04:33,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:04:33,516 INFO L225 Difference]: With dead ends: 561 [2022-12-13 15:04:33,516 INFO L226 Difference]: Without dead ends: 218 [2022-12-13 15:04:33,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2264 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1129, Invalid=11296, Unknown=7, NotChecked=0, Total=12432 [2022-12-13 15:04:33,517 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 583 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 2999 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 3007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:04:33,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 1894 Invalid, 3007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2999 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-13 15:04:33,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-12-13 15:04:33,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2022-12-13 15:04:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0841121495327102) internal successors, (232), 214 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:33,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 232 transitions. [2022-12-13 15:04:33,521 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 232 transitions. Word has length 113 [2022-12-13 15:04:33,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:04:33,521 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 232 transitions. [2022-12-13 15:04:33,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.178082191780822) internal successors, (305), 73 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:33,522 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 232 transitions. [2022-12-13 15:04:33,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-13 15:04:33,522 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:04:33,522 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:04:33,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 15:04:33,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 15:04:33,724 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:04:33,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:33,725 INFO L85 PathProgramCache]: Analyzing trace with hash -102640491, now seen corresponding path program 8 times [2022-12-13 15:04:33,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:04:33,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439209133] [2022-12-13 15:04:33,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:33,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:04:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 265 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:04:34,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:04:34,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439209133] [2022-12-13 15:04:34,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439209133] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:04:34,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003378232] [2022-12-13 15:04:34,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:04:34,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:34,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:04:34,624 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:04:34,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 15:04:34,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:04:34,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:04:34,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 98 conjunts are in the unsatisfiable core [2022-12-13 15:04:34,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:34,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 15:04:35,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 15:04:35,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 15:04:37,001 INFO L321 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-12-13 15:04:37,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 20 [2022-12-13 15:04:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 265 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:04:37,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:04:38,047 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_752 (Array Int Int))) (let ((.cse1 (select v_ArrVal_752 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_752) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (not (= (select .cse0 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse1)) (= .cse1 0) (not (= .cse1 (select .cse0 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))))))) is different from false [2022-12-13 15:04:38,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:38,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2022-12-13 15:04:38,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:38,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 73 [2022-12-13 15:04:38,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:38,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 60 [2022-12-13 15:04:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 24 proven. 252 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:04:38,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003378232] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:04:38,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:04:38,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 30] total 76 [2022-12-13 15:04:38,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941404427] [2022-12-13 15:04:38,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:04:38,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-13 15:04:38,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:04:38,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-13 15:04:38,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=5237, Unknown=1, NotChecked=146, Total=5700 [2022-12-13 15:04:38,683 INFO L87 Difference]: Start difference. First operand 215 states and 232 transitions. Second operand has 76 states, 76 states have (on average 4.2105263157894735) internal successors, (320), 76 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:47,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:04:47,027 INFO L93 Difference]: Finished difference Result 682 states and 733 transitions. [2022-12-13 15:04:47,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-13 15:04:47,028 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 4.2105263157894735) internal successors, (320), 76 states have internal predecessors, (320), 0 states have call successors, (0), 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 124 [2022-12-13 15:04:47,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:04:47,029 INFO L225 Difference]: With dead ends: 682 [2022-12-13 15:04:47,029 INFO L226 Difference]: Without dead ends: 670 [2022-12-13 15:04:47,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2989 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1573, Invalid=15722, Unknown=1, NotChecked=260, Total=17556 [2022-12-13 15:04:47,030 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1967 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 2774 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1967 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 2997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:04:47,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1967 Valid, 1350 Invalid, 2997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2774 Invalid, 0 Unknown, 207 Unchecked, 1.5s Time] [2022-12-13 15:04:47,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-12-13 15:04:47,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 489. [2022-12-13 15:04:47,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 1.0819672131147542) internal successors, (528), 488 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 528 transitions. [2022-12-13 15:04:47,035 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 528 transitions. Word has length 124 [2022-12-13 15:04:47,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:04:47,035 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 528 transitions. [2022-12-13 15:04:47,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 4.2105263157894735) internal successors, (320), 76 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:47,035 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 528 transitions. [2022-12-13 15:04:47,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-13 15:04:47,036 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:04:47,036 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:04:47,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 15:04:47,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 15:04:47,237 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:04:47,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:47,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1525692878, now seen corresponding path program 9 times [2022-12-13 15:04:47,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:04:47,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713612960] [2022-12-13 15:04:47,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:47,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:04:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 28 proven. 269 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:04:47,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:04:47,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713612960] [2022-12-13 15:04:47,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713612960] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:04:47,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934074296] [2022-12-13 15:04:47,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:04:47,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:47,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:04:47,675 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:04:47,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 15:04:47,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-13 15:04:47,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:04:47,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 15:04:47,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 45 proven. 252 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:04:48,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:04:48,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-13 15:04:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 45 proven. 252 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:04:48,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934074296] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:04:48,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:04:48,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 41 [2022-12-13 15:04:48,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559483382] [2022-12-13 15:04:48,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:04:48,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 15:04:48,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:04:48,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 15:04:48,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1466, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 15:04:48,891 INFO L87 Difference]: Start difference. First operand 489 states and 528 transitions. Second operand has 42 states, 41 states have (on average 7.7317073170731705) internal successors, (317), 42 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:49,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:04:49,386 INFO L93 Difference]: Finished difference Result 793 states and 856 transitions. [2022-12-13 15:04:49,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 15:04:49,386 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 7.7317073170731705) internal successors, (317), 42 states have internal predecessors, (317), 0 states have call successors, (0), 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 128 [2022-12-13 15:04:49,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:04:49,387 INFO L225 Difference]: With dead ends: 793 [2022-12-13 15:04:49,387 INFO L226 Difference]: Without dead ends: 793 [2022-12-13 15:04:49,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 223 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=554, Invalid=2202, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 15:04:49,388 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 556 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:04:49,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 754 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 15:04:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-12-13 15:04:49,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 515. [2022-12-13 15:04:49,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.0817120622568093) internal successors, (556), 514 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 556 transitions. [2022-12-13 15:04:49,393 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 556 transitions. Word has length 128 [2022-12-13 15:04:49,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:04:49,393 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 556 transitions. [2022-12-13 15:04:49,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 7.7317073170731705) internal successors, (317), 42 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:04:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 556 transitions. [2022-12-13 15:04:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-13 15:04:49,394 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:04:49,394 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:04:49,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 15:04:49,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 15:04:49,594 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:04:49,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:49,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1469975039, now seen corresponding path program 10 times [2022-12-13 15:04:49,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:04:49,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847237081] [2022-12-13 15:04:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:49,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:04:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 12 proven. 305 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 15:04:50,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:04:50,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847237081] [2022-12-13 15:04:50,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847237081] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:04:50,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70273219] [2022-12-13 15:04:50,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:04:50,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:50,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:04:50,397 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:04:50,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 15:04:50,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:04:50,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:04:50,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 145 conjunts are in the unsatisfiable core [2022-12-13 15:04:50,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:50,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 15:04:50,619 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-13 15:04:50,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 15:04:59,679 INFO L321 Elim1Store]: treesize reduction 148, result has 61.6 percent of original size [2022-12-13 15:04:59,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 30 case distinctions, treesize of input 126 treesize of output 272 [2022-12-13 15:04:59,753 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 15:04:59,778 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-13 15:04:59,797 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 15:04:59,818 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-13 15:04:59,851 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-12-13 15:05:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 65 proven. 219 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 15:05:00,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:05:09,705 INFO L321 Elim1Store]: treesize reduction 160, result has 30.4 percent of original size [2022-12-13 15:05:09,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 1097 treesize of output 846 [2022-12-13 15:05:09,728 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:05:09,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 822 treesize of output 764 [2022-12-13 15:05:09,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 15:05:09,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:05:09,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:05:09,984 INFO L321 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2022-12-13 15:05:09,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 108 treesize of output 109 [2022-12-13 15:05:09,997 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 15:05:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 279 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 15:05:10,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70273219] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:05:10,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:05:10,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 51, 50] total 121 [2022-12-13 15:05:10,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633669739] [2022-12-13 15:05:10,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:05:10,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-12-13 15:05:10,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:05:10,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-12-13 15:05:10,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1209, Invalid=13311, Unknown=0, NotChecked=0, Total=14520 [2022-12-13 15:05:10,046 INFO L87 Difference]: Start difference. First operand 515 states and 556 transitions. Second operand has 121 states, 121 states have (on average 2.7107438016528924) internal successors, (328), 121 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:30,779 INFO L93 Difference]: Finished difference Result 4089 states and 4426 transitions. [2022-12-13 15:12:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1133 states. [2022-12-13 15:12:30,780 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.7107438016528924) internal successors, (328), 121 states have internal predecessors, (328), 0 states have call successors, (0), 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 130 [2022-12-13 15:12:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:30,783 INFO L225 Difference]: With dead ends: 4089 [2022-12-13 15:12:30,783 INFO L226 Difference]: Without dead ends: 2359 [2022-12-13 15:12:30,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1410 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 1247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677706 ImplicationChecksByTransitivity, 421.3s TimeCoverageRelationStatistics Valid=106013, Invalid=1452739, Unknown=0, NotChecked=0, Total=1558752 [2022-12-13 15:12:30,910 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 6923 mSDsluCounter, 3270 mSDsCounter, 0 mSdLazyCounter, 26328 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6923 SdHoareTripleChecker+Valid, 3320 SdHoareTripleChecker+Invalid, 26854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 26328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:30,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6923 Valid, 3320 Invalid, 26854 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [526 Valid, 26328 Invalid, 0 Unknown, 0 Unchecked, 30.2s Time] [2022-12-13 15:12:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2022-12-13 15:12:30,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 941. [2022-12-13 15:12:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 1.1) internal successors, (1034), 940 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:30,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1034 transitions. [2022-12-13 15:12:30,924 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1034 transitions. Word has length 130 [2022-12-13 15:12:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:30,925 INFO L495 AbstractCegarLoop]: Abstraction has 941 states and 1034 transitions. [2022-12-13 15:12:30,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.7107438016528924) internal successors, (328), 121 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:30,925 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1034 transitions. [2022-12-13 15:12:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-13 15:12:30,926 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:30,926 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:12:30,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 15:12:31,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-12-13 15:12:31,127 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:12:31,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:31,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1310127411, now seen corresponding path program 11 times [2022-12-13 15:12:31,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:31,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684542324] [2022-12-13 15:12:31,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:31,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 13 proven. 369 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:12:32,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:32,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684542324] [2022-12-13 15:12:32,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684542324] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:12:32,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312090725] [2022-12-13 15:12:32,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:12:32,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:12:32,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:12:32,271 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:12:32,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 15:12:32,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-12-13 15:12:32,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:12:32,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-13 15:12:32,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:12:32,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 15:12:32,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 15:12:32,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 15:12:33,742 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-12-13 15:12:33,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2022-12-13 15:12:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 13 proven. 369 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:12:33,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:12:34,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:12:34,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-13 15:12:34,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:12:34,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-13 15:12:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 13 proven. 369 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:12:34,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312090725] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:12:34,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:12:34,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 61 [2022-12-13 15:12:34,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180218536] [2022-12-13 15:12:34,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:12:34,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-13 15:12:34,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:34,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-13 15:12:34,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3473, Unknown=12, NotChecked=0, Total=3660 [2022-12-13 15:12:34,645 INFO L87 Difference]: Start difference. First operand 941 states and 1034 transitions. Second operand has 61 states, 61 states have (on average 4.672131147540983) internal successors, (285), 61 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:38,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:38,395 INFO L93 Difference]: Finished difference Result 2584 states and 2792 transitions. [2022-12-13 15:12:38,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 15:12:38,395 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.672131147540983) internal successors, (285), 61 states have internal predecessors, (285), 0 states have call successors, (0), 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 141 [2022-12-13 15:12:38,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:38,397 INFO L225 Difference]: With dead ends: 2584 [2022-12-13 15:12:38,397 INFO L226 Difference]: Without dead ends: 948 [2022-12-13 15:12:38,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 247 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1015, Invalid=9685, Unknown=12, NotChecked=0, Total=10712 [2022-12-13 15:12:38,398 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 1037 mSDsluCounter, 1976 mSDsCounter, 0 mSdLazyCounter, 3450 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 2033 SdHoareTripleChecker+Invalid, 3459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:38,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 2033 Invalid, 3459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 3450 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-13 15:12:38,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-12-13 15:12:38,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 945. [2022-12-13 15:12:38,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 1.0995762711864407) internal successors, (1038), 944 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:38,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1038 transitions. [2022-12-13 15:12:38,408 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1038 transitions. Word has length 141 [2022-12-13 15:12:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:38,408 INFO L495 AbstractCegarLoop]: Abstraction has 945 states and 1038 transitions. [2022-12-13 15:12:38,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.672131147540983) internal successors, (285), 61 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1038 transitions. [2022-12-13 15:12:38,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-13 15:12:38,409 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:38,409 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:12:38,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 15:12:38,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-13 15:12:38,610 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:12:38,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:38,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1511993034, now seen corresponding path program 12 times [2022-12-13 15:12:38,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:38,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166733960] [2022-12-13 15:12:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:38,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 45 proven. 362 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:12:39,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:39,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166733960] [2022-12-13 15:12:39,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166733960] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:12:39,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802975471] [2022-12-13 15:12:39,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:12:39,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:12:39,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:12:39,226 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:12:39,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 15:12:39,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-12-13 15:12:39,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:12:39,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 15:12:39,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:12:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 66 proven. 341 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:12:39,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:12:40,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-13 15:12:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 66 proven. 341 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:12:40,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802975471] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:12:40,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:12:40,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 46 [2022-12-13 15:12:40,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698580564] [2022-12-13 15:12:40,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:12:40,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 15:12:40,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:40,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 15:12:40,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1841, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 15:12:40,546 INFO L87 Difference]: Start difference. First operand 945 states and 1038 transitions. Second operand has 47 states, 46 states have (on average 7.913043478260869) internal successors, (364), 47 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:41,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:41,089 INFO L93 Difference]: Finished difference Result 1991 states and 2180 transitions. [2022-12-13 15:12:41,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 15:12:41,089 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 7.913043478260869) internal successors, (364), 47 states have internal predecessors, (364), 0 states have call successors, (0), 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 145 [2022-12-13 15:12:41,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:41,093 INFO L225 Difference]: With dead ends: 1991 [2022-12-13 15:12:41,093 INFO L226 Difference]: Without dead ends: 1991 [2022-12-13 15:12:41,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 253 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=659, Invalid=2647, Unknown=0, NotChecked=0, Total=3306 [2022-12-13 15:12:41,094 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1275 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:41,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1275 Valid, 685 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 15:12:41,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2022-12-13 15:12:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1003. [2022-12-13 15:12:41,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 1.098802395209581) internal successors, (1101), 1002 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:41,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1101 transitions. [2022-12-13 15:12:41,104 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1101 transitions. Word has length 145 [2022-12-13 15:12:41,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:41,105 INFO L495 AbstractCegarLoop]: Abstraction has 1003 states and 1101 transitions. [2022-12-13 15:12:41,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 7.913043478260869) internal successors, (364), 47 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:41,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1101 transitions. [2022-12-13 15:12:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-13 15:12:41,106 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:41,106 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:12:41,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 15:12:41,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:12:41,306 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:12:41,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:41,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1718432105, now seen corresponding path program 13 times [2022-12-13 15:12:41,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:41,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875976713] [2022-12-13 15:12:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:41,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 15 proven. 490 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:12:42,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:42,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875976713] [2022-12-13 15:12:42,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875976713] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:12:42,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269667490] [2022-12-13 15:12:42,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:12:42,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:12:42,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:12:42,526 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:12:42,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 15:12:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:42,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 106 conjunts are in the unsatisfiable core [2022-12-13 15:12:42,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:12:43,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 15:12:43,188 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-13 15:12:43,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 15:12:46,470 INFO L321 Elim1Store]: treesize reduction 79, result has 26.2 percent of original size [2022-12-13 15:12:46,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 47 [2022-12-13 15:12:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 15 proven. 490 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:12:46,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:12:47,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:12:47,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 134 [2022-12-13 15:12:47,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 109 [2022-12-13 15:12:47,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:12:47,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 53 [2022-12-13 15:12:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 46 proven. 459 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:12:48,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269667490] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:12:48,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:12:48,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 31] total 79 [2022-12-13 15:12:48,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022282516] [2022-12-13 15:12:48,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:12:48,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-12-13 15:12:48,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:48,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-12-13 15:12:48,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=5879, Unknown=0, NotChecked=0, Total=6162 [2022-12-13 15:12:48,060 INFO L87 Difference]: Start difference. First operand 1003 states and 1101 transitions. Second operand has 79 states, 79 states have (on average 4.518987341772152) internal successors, (357), 79 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:53,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:53,144 INFO L93 Difference]: Finished difference Result 2959 states and 3230 transitions. [2022-12-13 15:12:53,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 15:12:53,144 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 4.518987341772152) internal successors, (357), 79 states have internal predecessors, (357), 0 states have call successors, (0), 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 158 [2022-12-13 15:12:53,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:53,157 INFO L225 Difference]: With dead ends: 2959 [2022-12-13 15:12:53,158 INFO L226 Difference]: Without dead ends: 2927 [2022-12-13 15:12:53,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=890, Invalid=12220, Unknown=0, NotChecked=0, Total=13110 [2022-12-13 15:12:53,158 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 536 mSDsluCounter, 2728 mSDsCounter, 0 mSdLazyCounter, 4116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 2796 SdHoareTripleChecker+Invalid, 4121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 4116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:53,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 2796 Invalid, 4121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 4116 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-13 15:12:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2022-12-13 15:12:53,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 1645. [2022-12-13 15:12:53,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 1.0900243309002433) internal successors, (1792), 1644 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:53,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 1792 transitions. [2022-12-13 15:12:53,182 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 1792 transitions. Word has length 158 [2022-12-13 15:12:53,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:53,182 INFO L495 AbstractCegarLoop]: Abstraction has 1645 states and 1792 transitions. [2022-12-13 15:12:53,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 4.518987341772152) internal successors, (357), 79 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:53,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 1792 transitions. [2022-12-13 15:12:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-12-13 15:12:53,184 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:53,184 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:12:53,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 15:12:53,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-13 15:12:53,385 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:12:53,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:53,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1492261108, now seen corresponding path program 14 times [2022-12-13 15:12:53,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:53,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805002501] [2022-12-13 15:12:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:53,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 66 proven. 468 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:12:53,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:53,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805002501] [2022-12-13 15:12:53,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805002501] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:12:53,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594560852] [2022-12-13 15:12:53,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:12:53,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:12:53,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:12:53,981 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:12:53,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 15:12:54,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:12:54,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:12:54,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 15:12:54,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:12:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 91 proven. 443 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:12:54,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:12:55,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 15:12:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 91 proven. 443 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:12:55,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594560852] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:12:55,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:12:55,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2022-12-13 15:12:55,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348242183] [2022-12-13 15:12:55,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:12:55,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 15:12:55,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:55,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 15:12:55,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 15:12:55,354 INFO L87 Difference]: Start difference. First operand 1645 states and 1792 transitions. Second operand has 44 states, 43 states have (on average 7.4186046511627906) internal successors, (319), 44 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:56,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:56,314 INFO L93 Difference]: Finished difference Result 3464 states and 3786 transitions. [2022-12-13 15:12:56,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 15:12:56,314 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 7.4186046511627906) internal successors, (319), 44 states have internal predecessors, (319), 0 states have call successors, (0), 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 162 [2022-12-13 15:12:56,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:56,319 INFO L225 Difference]: With dead ends: 3464 [2022-12-13 15:12:56,319 INFO L226 Difference]: Without dead ends: 3464 [2022-12-13 15:12:56,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 291 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=613, Invalid=2579, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 15:12:56,319 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 799 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:56,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 1461 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 15:12:56,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2022-12-13 15:12:56,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 1703. [2022-12-13 15:12:56,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 1.0898942420681552) internal successors, (1855), 1702 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 1855 transitions. [2022-12-13 15:12:56,335 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 1855 transitions. Word has length 162 [2022-12-13 15:12:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:56,335 INFO L495 AbstractCegarLoop]: Abstraction has 1703 states and 1855 transitions. [2022-12-13 15:12:56,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 7.4186046511627906) internal successors, (319), 44 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:12:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 1855 transitions. [2022-12-13 15:12:56,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-13 15:12:56,337 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:56,337 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:12:56,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-13 15:12:56,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-13 15:12:56,538 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 15:12:56,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:56,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1057372291, now seen corresponding path program 15 times [2022-12-13 15:12:56,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:56,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002305808] [2022-12-13 15:12:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:56,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 15 proven. 538 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 15:12:57,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:57,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002305808] [2022-12-13 15:12:57,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002305808] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:12:57,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626907139] [2022-12-13 15:12:57,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:12:57,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:12:57,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:12:57,977 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:12:57,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2650b086-7272-4a06-b8ea-0d646399212d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 15:12:58,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-13 15:12:58,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:12:58,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 98 conjunts are in the unsatisfiable core [2022-12-13 15:12:58,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:12:58,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 15:12:58,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 15:12:59,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 15:13:08,179 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:13:08,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 26 [2022-12-13 15:13:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 66 proven. 487 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 15:13:08,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:13:12,171 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_202| Int) (v_ArrVal_1136 (Array Int Int))) (let ((.cse0 (select v_ArrVal_1136 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (< (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_202|) (not (<= 0 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_202|)) (<= (+ |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_202| 2) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (not (= .cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1136) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_202|))) (= .cse0 0)))) is different from false [2022-12-13 15:13:12,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:13:12,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-12-13 15:13:12,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:13:12,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2022-12-13 15:13:12,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:13:12,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-12-13 15:13:12,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 15:13:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 66 proven. 487 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 15:13:13,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626907139] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:13:13,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:13:13,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 32] total 91 [2022-12-13 15:13:13,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995793730] [2022-12-13 15:13:13,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:13:13,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-12-13 15:13:13,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:13:13,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-12-13 15:13:13,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=7501, Unknown=2, NotChecked=176, Total=8190 [2022-12-13 15:13:13,015 INFO L87 Difference]: Start difference. First operand 1703 states and 1855 transitions. Second operand has 91 states, 91 states have (on average 4.857142857142857) internal successors, (442), 91 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:13:37,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:13:46,455 WARN L233 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 89 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:13:48,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:13:50,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:14:06,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:14:10,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:14:12,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:15:02,698 WARN L233 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 98 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:15:04,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:15:14,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:15:16,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:15:18,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]