./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-dietlibc/strcpy_small.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-dietlibc/strcpy_small.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ac582ab464abffec628fd39914d1e8ed3c994a881b722675333d088c8e0918eb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:16:16,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:16:16,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:16:16,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:16:16,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:16:16,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:16:16,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:16:16,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:16:16,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:16:16,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:16:16,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:16:16,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:16:16,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:16:16,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:16:16,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:16:16,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:16:16,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:16:16,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:16:16,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:16:16,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:16:16,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:16:16,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:16:16,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:16:16,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:16:16,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:16:16,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:16:16,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:16:16,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:16:16,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:16:16,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:16:16,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:16:16,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:16:16,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:16:16,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:16:16,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:16:16,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:16:16,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:16:16,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:16:16,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:16:16,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:16:16,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:16:16,414 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-11-25 18:16:16,438 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:16:16,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:16:16,439 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:16:16,439 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:16:16,440 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:16:16,440 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:16:16,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:16:16,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:16:16,442 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:16:16,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:16:16,442 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:16:16,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:16:16,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:16:16,443 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:16:16,443 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:16:16,443 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:16:16,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:16:16,444 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:16:16,444 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:16:16,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:16:16,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:16:16,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:16:16,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:16:16,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:16:16,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:16:16,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:16:16,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:16:16,446 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:16:16,446 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:16:16,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:16:16,447 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_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac582ab464abffec628fd39914d1e8ed3c994a881b722675333d088c8e0918eb [2022-11-25 18:16:16,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:16:16,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:16:16,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:16:16,773 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:16:16,774 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:16:16,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/termination-dietlibc/strcpy_small.i [2022-11-25 18:16:19,976 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:16:20,238 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:16:20,239 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/sv-benchmarks/c/termination-dietlibc/strcpy_small.i [2022-11-25 18:16:20,260 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/data/42119551f/e3a6070e6bf146b59fcb5139b66c2c8a/FLAGcaf08a781 [2022-11-25 18:16:20,282 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/data/42119551f/e3a6070e6bf146b59fcb5139b66c2c8a [2022-11-25 18:16:20,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:16:20,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:16:20,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:16:20,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:16:20,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:16:20,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:16:20" (1/1) ... [2022-11-25 18:16:20,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67283ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:20, skipping insertion in model container [2022-11-25 18:16:20,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:16:20" (1/1) ... [2022-11-25 18:16:20,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:16:20,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:16:20,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:16:20,701 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:16:20,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:16:20,759 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:16:20,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:20 WrapperNode [2022-11-25 18:16:20,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:16:20,761 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:16:20,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:16:20,761 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:16:20,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:20" (1/1) ... [2022-11-25 18:16:20,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:20" (1/1) ... [2022-11-25 18:16:20,801 INFO L138 Inliner]: procedures = 113, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2022-11-25 18:16:20,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:16:20,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:16:20,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:16:20,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:16:20,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:20" (1/1) ... [2022-11-25 18:16:20,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:20" (1/1) ... [2022-11-25 18:16:20,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:20" (1/1) ... [2022-11-25 18:16:20,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:20" (1/1) ... [2022-11-25 18:16:20,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:20" (1/1) ... [2022-11-25 18:16:20,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:20" (1/1) ... [2022-11-25 18:16:20,823 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:20" (1/1) ... [2022-11-25 18:16:20,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:20" (1/1) ... [2022-11-25 18:16:20,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:16:20,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:16:20,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:16:20,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:16:20,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:20" (1/1) ... [2022-11-25 18:16:20,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:16:20,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:20,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:16:20,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:16:20,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:16:20,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:16:20,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:16:20,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:16:20,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:16:20,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:16:21,035 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:16:21,037 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:16:21,243 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:16:21,248 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:16:21,249 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 18:16:21,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:16:21 BoogieIcfgContainer [2022-11-25 18:16:21,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:16:21,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:16:21,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:16:21,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:16:21,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:16:20" (1/3) ... [2022-11-25 18:16:21,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53322a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:16:21, skipping insertion in model container [2022-11-25 18:16:21,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:20" (2/3) ... [2022-11-25 18:16:21,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53322a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:16:21, skipping insertion in model container [2022-11-25 18:16:21,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:16:21" (3/3) ... [2022-11-25 18:16:21,260 INFO L112 eAbstractionObserver]: Analyzing ICFG strcpy_small.i [2022-11-25 18:16:21,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:16:21,279 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2022-11-25 18:16:21,356 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:16:21,362 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;@1960608e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:16:21,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 18:16:21,369 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:21,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 18:16:21,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:16:21,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 18:16:21,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:16:21,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:21,392 INFO L85 PathProgramCache]: Analyzing trace with hash 925638, now seen corresponding path program 1 times [2022-11-25 18:16:21,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:21,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519335734] [2022-11-25 18:16:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:21,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:21,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:21,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519335734] [2022-11-25 18:16:21,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519335734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:21,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:21,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:16:21,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047546587] [2022-11-25 18:16:21,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:21,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:16:21,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:21,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:16:21,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:16:21,678 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:16:21,736 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-11-25 18:16:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:16:21,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-25 18:16:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:16:21,752 INFO L225 Difference]: With dead ends: 23 [2022-11-25 18:16:21,752 INFO L226 Difference]: Without dead ends: 20 [2022-11-25 18:16:21,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:16:21,757 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:16:21,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 30 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:16:21,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-25 18:16:21,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-25 18:16:21,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:21,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-25 18:16:21,789 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 4 [2022-11-25 18:16:21,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:16:21,789 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-25 18:16:21,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:21,790 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-25 18:16:21,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 18:16:21,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:16:21,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 18:16:21,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:16:21,791 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:16:21,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:21,792 INFO L85 PathProgramCache]: Analyzing trace with hash 925669, now seen corresponding path program 1 times [2022-11-25 18:16:21,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:21,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104832774] [2022-11-25 18:16:21,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:21,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:21,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:21,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104832774] [2022-11-25 18:16:21,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104832774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:21,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:21,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:16:21,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203223454] [2022-11-25 18:16:21,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:21,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:16:21,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:21,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:16:21,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:16:21,903 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:21,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:16:21,928 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-25 18:16:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:16:21,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-25 18:16:21,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:16:21,929 INFO L225 Difference]: With dead ends: 19 [2022-11-25 18:16:21,930 INFO L226 Difference]: Without dead ends: 19 [2022-11-25 18:16:21,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:16:21,931 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:16:21,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 11 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:16:21,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-25 18:16:21,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-25 18:16:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-25 18:16:21,936 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 4 [2022-11-25 18:16:21,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:16:21,936 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-25 18:16:21,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:21,937 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-25 18:16:21,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 18:16:21,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:16:21,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 18:16:21,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:16:21,938 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:16:21,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:21,939 INFO L85 PathProgramCache]: Analyzing trace with hash 925670, now seen corresponding path program 1 times [2022-11-25 18:16:21,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:21,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173609249] [2022-11-25 18:16:21,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:21,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:22,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:22,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173609249] [2022-11-25 18:16:22,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173609249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:22,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:22,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:16:22,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709251525] [2022-11-25 18:16:22,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:22,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:16:22,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:22,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:16:22,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:16:22,136 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:22,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:16:22,168 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-11-25 18:16:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:16:22,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-25 18:16:22,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:16:22,170 INFO L225 Difference]: With dead ends: 20 [2022-11-25 18:16:22,170 INFO L226 Difference]: Without dead ends: 20 [2022-11-25 18:16:22,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:16:22,172 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:16:22,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 25 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:16:22,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-25 18:16:22,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-11-25 18:16:22,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-25 18:16:22,178 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 4 [2022-11-25 18:16:22,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:16:22,179 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-25 18:16:22,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:22,179 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-25 18:16:22,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 18:16:22,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:16:22,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:22,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:16:22,180 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:16:22,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:22,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1806782657, now seen corresponding path program 1 times [2022-11-25 18:16:22,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:22,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388292122] [2022-11-25 18:16:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:22,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:22,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:22,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388292122] [2022-11-25 18:16:22,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388292122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:22,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:22,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:16:22,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122616672] [2022-11-25 18:16:22,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:22,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:16:22,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:22,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:16:22,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:16:22,303 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:22,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:16:22,336 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2022-11-25 18:16:22,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:16:22,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 18:16:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:16:22,338 INFO L225 Difference]: With dead ends: 19 [2022-11-25 18:16:22,338 INFO L226 Difference]: Without dead ends: 18 [2022-11-25 18:16:22,338 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 [2022-11-25 18:16:22,340 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:16:22,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:16:22,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-25 18:16:22,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-25 18:16:22,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:22,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-11-25 18:16:22,345 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 7 [2022-11-25 18:16:22,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:16:22,346 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-11-25 18:16:22,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:22,346 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-11-25 18:16:22,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 18:16:22,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:16:22,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:22,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:16:22,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:16:22,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:22,349 INFO L85 PathProgramCache]: Analyzing trace with hash 175688875, now seen corresponding path program 1 times [2022-11-25 18:16:22,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:22,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692414082] [2022-11-25 18:16:22,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:22,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:22,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:22,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692414082] [2022-11-25 18:16:22,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692414082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:22,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:22,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:16:22,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755279023] [2022-11-25 18:16:22,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:22,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:16:22,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:22,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:16:22,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:16:22,630 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:22,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:16:22,698 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-11-25 18:16:22,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:16:22,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 18:16:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:16:22,700 INFO L225 Difference]: With dead ends: 17 [2022-11-25 18:16:22,700 INFO L226 Difference]: Without dead ends: 17 [2022-11-25 18:16:22,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:16:22,701 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:16:22,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 12 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:16:22,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-25 18:16:22,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-25 18:16:22,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:22,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-11-25 18:16:22,706 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 8 [2022-11-25 18:16:22,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:16:22,706 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-11-25 18:16:22,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-11-25 18:16:22,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 18:16:22,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:16:22,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:22,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:16:22,708 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:16:22,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:22,709 INFO L85 PathProgramCache]: Analyzing trace with hash 175688876, now seen corresponding path program 1 times [2022-11-25 18:16:22,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:22,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610906043] [2022-11-25 18:16:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:22,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:23,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:23,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610906043] [2022-11-25 18:16:23,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610906043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:23,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:23,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:16:23,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807120583] [2022-11-25 18:16:23,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:23,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:16:23,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:23,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:16:23,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:16:23,139 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:23,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:16:23,318 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2022-11-25 18:16:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:16:23,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 18:16:23,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:16:23,321 INFO L225 Difference]: With dead ends: 23 [2022-11-25 18:16:23,321 INFO L226 Difference]: Without dead ends: 23 [2022-11-25 18:16:23,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:16:23,325 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:16:23,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 21 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:16:23,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-25 18:16:23,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2022-11-25 18:16:23,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:23,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-11-25 18:16:23,338 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 8 [2022-11-25 18:16:23,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:16:23,339 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-11-25 18:16:23,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:23,339 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-11-25 18:16:23,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 18:16:23,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:16:23,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:23,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:16:23,341 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:16:23,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:23,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1151387824, now seen corresponding path program 1 times [2022-11-25 18:16:23,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:23,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915143233] [2022-11-25 18:16:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:23,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:23,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:23,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915143233] [2022-11-25 18:16:23,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915143233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:23,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:23,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:16:23,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545926194] [2022-11-25 18:16:23,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:23,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:16:23,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:23,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:16:23,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:16:23,468 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:23,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:16:23,513 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2022-11-25 18:16:23,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:16:23,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 18:16:23,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:16:23,514 INFO L225 Difference]: With dead ends: 18 [2022-11-25 18:16:23,515 INFO L226 Difference]: Without dead ends: 18 [2022-11-25 18:16:23,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:16:23,520 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:16:23,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 14 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:16:23,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-25 18:16:23,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-25 18:16:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:23,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-11-25 18:16:23,535 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 9 [2022-11-25 18:16:23,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:16:23,536 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-11-25 18:16:23,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:23,536 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-11-25 18:16:23,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 18:16:23,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:16:23,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:23,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:16:23,539 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:16:23,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:23,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1151387825, now seen corresponding path program 1 times [2022-11-25 18:16:23,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:23,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7762128] [2022-11-25 18:16:23,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:23,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:23,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:23,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7762128] [2022-11-25 18:16:23,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7762128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:23,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:23,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:16:23,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200949019] [2022-11-25 18:16:23,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:23,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:16:23,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:23,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:16:23,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:16:23,797 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:16:23,866 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-11-25 18:16:23,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:16:23,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 18:16:23,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:16:23,868 INFO L225 Difference]: With dead ends: 20 [2022-11-25 18:16:23,869 INFO L226 Difference]: Without dead ends: 20 [2022-11-25 18:16:23,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:16:23,871 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 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 [2022-11-25 18:16:23,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:16:23,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-25 18:16:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-11-25 18:16:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-11-25 18:16:23,876 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 9 [2022-11-25 18:16:23,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:16:23,878 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-11-25 18:16:23,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:23,884 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-11-25 18:16:23,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 18:16:23,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:16:23,885 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:23,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:16:23,887 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:16:23,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:23,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1385840564, now seen corresponding path program 1 times [2022-11-25 18:16:23,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:23,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541514827] [2022-11-25 18:16:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:23,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:24,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:24,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541514827] [2022-11-25 18:16:24,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541514827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:24,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314766227] [2022-11-25 18:16:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:24,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:24,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:24,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:24,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:16:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:24,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 18:16:24,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:24,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 18:16:24,828 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 18:16:24,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 18:16:24,903 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 18:16:24,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 18:16:25,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:16:25,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-11-25 18:16:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:25,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:25,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:16:25,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 18:16:25,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-25 18:16:25,651 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 20 treesize of output 16 [2022-11-25 18:16:25,665 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 18:16:25,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-25 18:16:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:25,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314766227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:16:25,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:16:25,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-25 18:16:25,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051460259] [2022-11-25 18:16:25,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:16:25,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 18:16:25,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:25,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 18:16:25,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-25 18:16:25,681 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:16:26,394 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-11-25 18:16:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:16:26,394 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 18:16:26,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:16:26,395 INFO L225 Difference]: With dead ends: 25 [2022-11-25 18:16:26,395 INFO L226 Difference]: Without dead ends: 25 [2022-11-25 18:16:26,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2022-11-25 18:16:26,396 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:16:26,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 61 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:16:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-25 18:16:26,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-11-25 18:16:26,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-11-25 18:16:26,399 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 12 [2022-11-25 18:16:26,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:16:26,400 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-11-25 18:16:26,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:26,400 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-11-25 18:16:26,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 18:16:26,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:16:26,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:26,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:26,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 18:16:26,607 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:16:26,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:26,607 INFO L85 PathProgramCache]: Analyzing trace with hash 11384489, now seen corresponding path program 1 times [2022-11-25 18:16:26,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:26,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095053723] [2022-11-25 18:16:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:26,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:27,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:27,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095053723] [2022-11-25 18:16:27,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095053723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:27,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378631573] [2022-11-25 18:16:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:27,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:27,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:27,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:27,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:16:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:27,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-25 18:16:27,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:27,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 18:16:27,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 18:16:27,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:16:27,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-25 18:16:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:28,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:28,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-25 18:16:28,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-25 18:16:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:28,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378631573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:16:28,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:16:28,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-11-25 18:16:28,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408490907] [2022-11-25 18:16:28,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:16:28,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 18:16:28,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:28,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 18:16:28,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-11-25 18:16:28,742 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:31,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:16:31,234 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2022-11-25 18:16:31,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 18:16:31,235 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 18:16:31,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:16:31,236 INFO L225 Difference]: With dead ends: 27 [2022-11-25 18:16:31,236 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 18:16:31,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2022-11-25 18:16:31,237 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 142 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 18:16:31,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 83 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 18:16:31,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 18:16:31,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2022-11-25 18:16:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 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) [2022-11-25 18:16:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-11-25 18:16:31,240 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 13 [2022-11-25 18:16:31,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:16:31,240 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-11-25 18:16:31,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:31,241 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-11-25 18:16:31,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 18:16:31,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:16:31,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:31,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:31,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:31,458 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:16:31,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:31,459 INFO L85 PathProgramCache]: Analyzing trace with hash 11339831, now seen corresponding path program 1 times [2022-11-25 18:16:31,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:31,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765181523] [2022-11-25 18:16:31,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:31,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:31,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:31,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765181523] [2022-11-25 18:16:31,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765181523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:31,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:31,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:16:31,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117796119] [2022-11-25 18:16:31,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:31,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:16:31,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:31,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:16:31,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:16:31,675 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:31,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:16:31,699 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-11-25 18:16:31,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:16:31,700 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 18:16:31,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:16:31,701 INFO L225 Difference]: With dead ends: 20 [2022-11-25 18:16:31,701 INFO L226 Difference]: Without dead ends: 17 [2022-11-25 18:16:31,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:16:31,702 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:16:31,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:16:31,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-25 18:16:31,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-25 18:16:31,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-11-25 18:16:31,706 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2022-11-25 18:16:31,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:16:31,707 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-11-25 18:16:31,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:31,707 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-11-25 18:16:31,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 18:16:31,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:16:31,708 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:31,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 18:16:31,709 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:16:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:31,709 INFO L85 PathProgramCache]: Analyzing trace with hash -147132740, now seen corresponding path program 2 times [2022-11-25 18:16:31,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:31,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567917660] [2022-11-25 18:16:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:31,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:32,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:32,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567917660] [2022-11-25 18:16:32,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567917660] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:32,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637128899] [2022-11-25 18:16:32,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:16:32,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:32,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:32,515 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:32,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:16:32,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:16:32,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:16:32,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 18:16:32,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:32,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:16:32,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 18:16:32,743 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 18:16:32,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 18:16:32,794 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 18:16:32,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 18:16:33,030 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 26 treesize of output 26 [2022-11-25 18:16:33,358 INFO L321 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2022-11-25 18:16:33,359 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 2 case distinctions, treesize of input 30 treesize of output 28 [2022-11-25 18:16:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:33,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:34,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:16:34,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-11-25 18:16:34,358 INFO L321 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-11-25 18:16:34,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 39 [2022-11-25 18:16:34,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:16:34,378 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-25 18:16:34,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-11-25 18:16:34,416 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 18:16:34,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-25 18:16:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:34,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637128899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:16:34,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:16:34,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2022-11-25 18:16:34,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220555349] [2022-11-25 18:16:34,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:16:34,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 18:16:34,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:34,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 18:16:34,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=896, Unknown=2, NotChecked=0, Total=992 [2022-11-25 18:16:34,491 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:36,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:16:36,794 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-11-25 18:16:36,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 18:16:36,794 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-25 18:16:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:16:36,795 INFO L225 Difference]: With dead ends: 23 [2022-11-25 18:16:36,795 INFO L226 Difference]: Without dead ends: 23 [2022-11-25 18:16:36,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=271, Invalid=1707, Unknown=2, NotChecked=0, Total=1980 [2022-11-25 18:16:36,796 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 53 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 18:16:36,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 71 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 18:16:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-25 18:16:36,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-11-25 18:16:36,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:36,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-11-25 18:16:36,799 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2022-11-25 18:16:36,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:16:36,799 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-11-25 18:16:36,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:36,800 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-11-25 18:16:36,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 18:16:36,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:16:36,800 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:36,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:37,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 18:16:37,006 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:16:37,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:37,007 INFO L85 PathProgramCache]: Analyzing trace with hash -295904828, now seen corresponding path program 3 times [2022-11-25 18:16:37,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:37,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773903748] [2022-11-25 18:16:37,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:37,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:38,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:38,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773903748] [2022-11-25 18:16:38,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773903748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:38,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092132117] [2022-11-25 18:16:38,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:16:38,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:38,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:38,075 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:38,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:16:38,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 18:16:38,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:16:38,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-25 18:16:38,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:38,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:16:38,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 18:16:38,505 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 18:16:38,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 18:16:38,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:16:38,762 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 23 treesize of output 23 [2022-11-25 18:16:39,107 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 33 treesize of output 31 [2022-11-25 18:16:39,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:16:39,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:16:39,429 INFO L321 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2022-11-25 18:16:39,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 33 [2022-11-25 18:16:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:39,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:43,015 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:16:43,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 48 [2022-11-25 18:16:43,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:16:43,024 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 31 treesize of output 25 [2022-11-25 18:16:43,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-11-25 18:16:43,057 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 18:16:43,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-25 18:16:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:43,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092132117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:16:43,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:16:43,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 44 [2022-11-25 18:16:43,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220101463] [2022-11-25 18:16:43,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:16:43,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-25 18:16:43,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:43,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-25 18:16:43,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1813, Unknown=3, NotChecked=0, Total=1980 [2022-11-25 18:16:43,237 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 45 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:47,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 18:16:49,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:16:49,435 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2022-11-25 18:16:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 18:16:49,440 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-25 18:16:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:16:49,441 INFO L225 Difference]: With dead ends: 31 [2022-11-25 18:16:49,441 INFO L226 Difference]: Without dead ends: 31 [2022-11-25 18:16:49,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=477, Invalid=3675, Unknown=8, NotChecked=0, Total=4160 [2022-11-25 18:16:49,444 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 86 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 20 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-25 18:16:49,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 80 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 462 Invalid, 6 Unknown, 0 Unchecked, 2.8s Time] [2022-11-25 18:16:49,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-25 18:16:49,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-11-25 18:16:49,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-11-25 18:16:49,449 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 20 [2022-11-25 18:16:49,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:16:49,449 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-11-25 18:16:49,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-11-25 18:16:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 18:16:49,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:16:49,450 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:49,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:49,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 18:16:49,657 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:16:49,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:49,658 INFO L85 PathProgramCache]: Analyzing trace with hash 388785108, now seen corresponding path program 4 times [2022-11-25 18:16:49,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:49,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653267841] [2022-11-25 18:16:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:49,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:51,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:51,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653267841] [2022-11-25 18:16:51,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653267841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:51,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916981900] [2022-11-25 18:16:51,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:16:51,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:51,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:51,522 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:51,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:16:51,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:16:51,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:16:51,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 138 conjunts are in the unsatisfiable core [2022-11-25 18:16:51,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:51,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:16:51,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:16:51,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 18:16:51,850 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 18:16:51,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 18:16:51,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:16:52,115 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 23 treesize of output 23 [2022-11-25 18:16:52,516 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 33 treesize of output 31 [2022-11-25 18:16:53,116 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 41 treesize of output 37 [2022-11-25 18:16:53,699 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 51 treesize of output 45 [2022-11-25 18:16:54,178 INFO L321 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2022-11-25 18:16:54,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 47 [2022-11-25 18:16:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:54,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:58,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:16:58,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 72 [2022-11-25 18:16:58,200 INFO L321 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2022-11-25 18:16:58,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 31 [2022-11-25 18:16:58,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:16:58,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:16:58,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 116 [2022-11-25 18:16:58,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:16:58,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:16:58,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:16:58,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:16:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:58,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916981900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:16:58,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:16:58,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 24] total 66 [2022-11-25 18:16:58,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407172102] [2022-11-25 18:16:58,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:16:58,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-25 18:16:58,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:58,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-25 18:16:58,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=4065, Unknown=40, NotChecked=0, Total=4422 [2022-11-25 18:16:58,629 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 67 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 67 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:09,480 WARN L233 SmtUtils]: Spent 6.65s on a formula simplification. DAG size of input: 138 DAG size of output: 125 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:17:27,336 WARN L233 SmtUtils]: Spent 15.52s on a formula simplification. DAG size of input: 154 DAG size of output: 142 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:17:29,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 18:17:31,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 18:17:41,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:17:41,802 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2022-11-25 18:17:41,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 18:17:41,803 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 67 states have internal predecessors, (80), 0 states have call successors, (0), 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 28 [2022-11-25 18:17:41,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:17:41,804 INFO L225 Difference]: With dead ends: 51 [2022-11-25 18:17:41,804 INFO L226 Difference]: Without dead ends: 51 [2022-11-25 18:17:41,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1726 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=1029, Invalid=9625, Unknown=58, NotChecked=0, Total=10712 [2022-11-25 18:17:41,807 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 155 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 52 mSolverCounterUnsat, 28 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 28 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:17:41,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 96 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 886 Invalid, 28 Unknown, 0 Unchecked, 6.0s Time] [2022-11-25 18:17:41,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-25 18:17:41,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-11-25 18:17:41,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-11-25 18:17:41,811 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 28 [2022-11-25 18:17:41,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:17:41,811 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-11-25 18:17:41,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 67 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:17:41,812 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-11-25 18:17:41,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 18:17:41,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:17:41,813 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:17:41,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:17:42,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 18:17:42,019 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 18:17:42,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:17:42,019 INFO L85 PathProgramCache]: Analyzing trace with hash -48965892, now seen corresponding path program 5 times [2022-11-25 18:17:42,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:17:42,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708684066] [2022-11-25 18:17:42,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:17:42,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:17:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:17:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:17:46,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:17:46,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708684066] [2022-11-25 18:17:46,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708684066] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:17:46,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460357140] [2022-11-25 18:17:46,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:17:46,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:17:46,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:17:46,327 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:17:46,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0169fc-c091-45b3-8543-b53cc5f31830/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:17:46,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-25 18:17:46,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:17:46,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 195 conjunts are in the unsatisfiable core [2022-11-25 18:17:46,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:17:46,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:17:46,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:17:46,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 18:17:46,857 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 18:17:46,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 18:17:46,903 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 18:17:46,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 18:17:47,370 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 26 treesize of output 26 [2022-11-25 18:17:55,218 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 36 treesize of output 34 [2022-11-25 18:18:08,365 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 46 treesize of output 42 [2022-11-25 18:18:27,889 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 56 treesize of output 50 [2022-11-25 18:18:51,414 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 66 treesize of output 58 [2022-11-25 18:19:12,693 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 76 treesize of output 66 [2022-11-25 18:19:40,309 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 86 treesize of output 74 [2022-11-25 18:20:22,073 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 96 treesize of output 82 [2022-11-25 18:21:32,874 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 106 treesize of output 90 [2022-11-25 18:22:10,141 INFO L321 Elim1Store]: treesize reduction 36, result has 55.6 percent of original size [2022-11-25 18:22:10,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 10 case distinctions, treesize of input 110 treesize of output 87 [2022-11-25 18:22:10,149 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2022-11-25 18:22:10,177 WARN L718 sPolynomialRelations]: Constructing 1024(two to the power of 10 dual juncts. [2022-11-25 18:22:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 59 proven. 47 refuted. 94 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:10,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:24:57,779 WARN L837 $PredicateComparison]: unable to prove that (or (let ((.cse0 (+ 9 |c_ULTIMATE.start_main_~in~0#1.offset|)) (.cse1 (+ 2 |c_ULTIMATE.start_main_~in~0#1.offset|)) (.cse2 (+ |c_ULTIMATE.start_main_~in~0#1.offset| 4)) (.cse3 (+ 8 |c_ULTIMATE.start_main_~in~0#1.offset|)) (.cse4 (+ 3 |c_ULTIMATE.start_main_~in~0#1.offset|)) (.cse5 (+ 7 |c_ULTIMATE.start_main_~in~0#1.offset|)) (.cse6 (+ |c_ULTIMATE.start_main_~in~0#1.offset| 1)) (.cse7 (+ 5 |c_ULTIMATE.start_main_~in~0#1.offset|)) (.cse8 (+ 6 |c_ULTIMATE.start_main_~in~0#1.offset|))) (and (forall ((v_ArrVal_238 (Array Int Int)) (v_ArrVal_237 (Array Int Int)) (v_ArrVal_239 (Array Int Int)) (|v_ULTIMATE.start_main_#t~malloc8#1.base_10| Int) (v_ArrVal_240 (Array Int Int)) (v_ArrVal_243 (Array Int Int)) (v_ArrVal_242 (Array Int Int)) (v_ArrVal_244 (Array Int Int)) (v_ArrVal_236 (Array Int Int)) (v_ArrVal_235 (Array Int Int))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc8#1.base_10|) 0)) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_244) |c_ULTIMATE.start_main_~in~0#1.base|) .cse0) 0) (= 0 (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_236) |c_ULTIMATE.start_main_~in~0#1.base|) .cse1)) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_238) |c_ULTIMATE.start_main_~in~0#1.base|) .cse2) 0) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_243) |c_ULTIMATE.start_main_~in~0#1.base|) .cse3) 0) (forall ((v_ArrVal_234 Int)) (<= (+ |c_ULTIMATE.start_main_~in~0#1.offset| 11) (select (store |c_#length| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_234) |c_ULTIMATE.start_main_~in~0#1.base|))) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_237) |c_ULTIMATE.start_main_~in~0#1.base|) .cse4) 0) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_242) |c_ULTIMATE.start_main_~in~0#1.base|) .cse5) 0) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_235) |c_ULTIMATE.start_main_~in~0#1.base|) .cse6) 0) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_239) |c_ULTIMATE.start_main_~in~0#1.base|) .cse7) 0) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_240) |c_ULTIMATE.start_main_~in~0#1.base|) .cse8) 0))) (or (forall ((v_ArrVal_238 (Array Int Int)) (v_ArrVal_237 (Array Int Int)) (v_ArrVal_239 (Array Int Int)) (|v_ULTIMATE.start_main_#t~malloc8#1.base_10| Int) (v_ArrVal_240 (Array Int Int)) (v_ArrVal_243 (Array Int Int)) (v_ArrVal_242 (Array Int Int)) (v_ArrVal_244 (Array Int Int)) (v_ArrVal_236 (Array Int Int)) (v_ArrVal_235 (Array Int Int))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc8#1.base_10|) 0)) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_244) |c_ULTIMATE.start_main_~in~0#1.base|) .cse0) 0) (= 0 (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_236) |c_ULTIMATE.start_main_~in~0#1.base|) .cse1)) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_238) |c_ULTIMATE.start_main_~in~0#1.base|) .cse2) 0) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_243) |c_ULTIMATE.start_main_~in~0#1.base|) .cse3) 0) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_237) |c_ULTIMATE.start_main_~in~0#1.base|) .cse4) 0) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_242) |c_ULTIMATE.start_main_~in~0#1.base|) .cse5) 0) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_235) |c_ULTIMATE.start_main_~in~0#1.base|) .cse6) 0) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_239) |c_ULTIMATE.start_main_~in~0#1.base|) .cse7) 0) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc8#1.base_10| v_ArrVal_240) |c_ULTIMATE.start_main_~in~0#1.base|) .cse8) 0))) (<= 0 (+ |c_ULTIMATE.start_main_~in~0#1.offset| 10))))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~in~0#1.base|) |c_ULTIMATE.start_main_~in~0#1.offset|) 0)) is different from false [2022-11-25 18:24:58,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:24:58,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 458 treesize of output 270 [2022-11-25 18:24:58,028 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 493 treesize of output 455 [2022-11-25 18:24:58,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 620 treesize of output 546 [2022-11-25 18:24:58,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:58,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:58,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:58,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:58,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:58,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:58,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:58,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:58,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:58,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:58,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:58,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:58,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:58,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:58,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:58,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:58,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:58,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:24:59,549 WARN L718 sPolynomialRelations]: Constructing 1024(two to the power of 10 dual juncts. [2022-11-25 18:24:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:24:59,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460357140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:24:59,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:24:59,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 44, 44] total 119 [2022-11-25 18:24:59,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548609301] [2022-11-25 18:24:59,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:24:59,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-11-25 18:24:59,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:59,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-11-25 18:24:59,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=957, Invalid=12666, Unknown=423, NotChecked=234, Total=14280 [2022-11-25 18:24:59,612 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 120 states, 119 states have (on average 1.1596638655462186) internal successors, (138), 120 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:25:15,456 WARN L233 SmtUtils]: Spent 7.26s on a formula simplification. DAG size of input: 62 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:25:25,265 WARN L233 SmtUtils]: Spent 7.93s on a formula simplification. DAG size of input: 74 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:25:32,900 WARN L233 SmtUtils]: Spent 7.28s on a formula simplification. DAG size of input: 103 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:25:34,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:25:44,885 WARN L233 SmtUtils]: Spent 8.15s on a formula simplification. DAG size of input: 70 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:26:01,047 WARN L233 SmtUtils]: Spent 13.74s 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) [2022-11-25 18:26:17,686 WARN L233 SmtUtils]: Spent 14.24s on a formula simplification. DAG size of input: 121 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:26:19,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:26:25,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:26:46,802 WARN L233 SmtUtils]: Spent 15.96s on a formula simplification. DAG size of input: 103 DAG size of output: 89 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:27:07,958 WARN L233 SmtUtils]: Spent 18.67s on a formula simplification. DAG size of input: 147 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:27:10,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:27:26,785 WARN L233 SmtUtils]: Spent 10.77s on a formula simplification. DAG size of input: 139 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:27:28,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:27:37,021 WARN L233 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 89 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:27:47,411 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 91 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:27:58,956 WARN L233 SmtUtils]: Spent 11.14s on a formula simplification. DAG size of input: 131 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:28:00,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:28:03,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:28:13,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:28:20,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:28:30,861 WARN L233 SmtUtils]: Spent 8.57s on a formula simplification. DAG size of input: 105 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:28:32,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:28:41,171 WARN L233 SmtUtils]: Spent 7.75s on a formula simplification. DAG size of input: 149 DAG size of output: 89 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:28:43,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:28:45,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:28:47,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:28:53,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:28:59,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:29:10,972 WARN L233 SmtUtils]: Spent 8.57s on a formula simplification. DAG size of input: 110 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:29:25,824 WARN L233 SmtUtils]: Spent 12.41s on a formula simplification. DAG size of input: 158 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:29:27,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:29:29,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:29:31,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:29:51,588 WARN L233 SmtUtils]: Spent 11.81s on a formula simplification. DAG size of input: 151 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:29:53,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:30:04,129 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 96 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:30:06,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:30:08,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:30:19,883 WARN L233 SmtUtils]: Spent 7.98s on a formula simplification. DAG size of input: 108 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:30:21,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:30:46,523 WARN L233 SmtUtils]: Spent 20.23s on a formula simplification. DAG size of input: 169 DAG size of output: 109 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:30:48,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:30:50,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:30:52,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:30:54,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:01,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:07,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:31:24,585 WARN L233 SmtUtils]: Spent 14.73s on a formula simplification. DAG size of input: 127 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)