./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a 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_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 --- 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-5e519f3 [2022-11-02 20:08:44,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:08:44,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:08:44,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:08:44,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:08:44,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:08:44,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:08:44,411 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:08:44,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:08:44,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:08:44,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:08:44,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:08:44,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:08:44,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:08:44,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:08:44,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:08:44,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:08:44,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:08:44,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:08:44,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:08:44,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:08:44,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:08:44,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:08:44,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:08:44,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:08:44,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:08:44,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:08:44,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:08:44,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:08:44,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:08:44,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:08:44,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:08:44,464 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:08:44,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:08:44,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:08:44,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:08:44,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:08:44,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:08:44,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:08:44,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:08:44,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:08:44,471 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-02 20:08:44,505 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:08:44,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:08:44,506 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:08:44,506 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:08:44,507 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:08:44,508 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:08:44,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:08:44,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:08:44,516 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:08:44,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:08:44,516 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:08:44,517 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:08:44,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:08:44,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:08:44,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:08:44,518 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:08:44,518 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:08:44,518 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 20:08:44,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:08:44,519 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:08:44,519 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:08:44,519 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:08:44,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:08:44,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:08:44,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:08:44,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:08:44,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:08:44,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:08:44,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:08:44,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:08:44,522 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2022-11-02 20:08:44,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:08:44,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:08:44,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:08:44,879 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:08:44,880 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:08:44,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2022-11-02 20:08:44,976 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/data/ad28288c0/b490e01d71624eb39cc870a18bb1262f/FLAG659c064bc [2022-11-02 20:08:45,456 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:08:45,457 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2022-11-02 20:08:45,464 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/data/ad28288c0/b490e01d71624eb39cc870a18bb1262f/FLAG659c064bc [2022-11-02 20:08:45,809 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/data/ad28288c0/b490e01d71624eb39cc870a18bb1262f [2022-11-02 20:08:45,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:08:45,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:08:45,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:08:45,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:08:45,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:08:45,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:08:45" (1/1) ... [2022-11-02 20:08:45,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e84358b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:45, skipping insertion in model container [2022-11-02 20:08:45,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:08:45" (1/1) ... [2022-11-02 20:08:45,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:08:45,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:08:46,088 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:08:46,098 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:08:46,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:08:46,138 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:08:46,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:46 WrapperNode [2022-11-02 20:08:46,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:08:46,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:08:46,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:08:46,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:08:46,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:46" (1/1) ... [2022-11-02 20:08:46,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:46" (1/1) ... [2022-11-02 20:08:46,182 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-11-02 20:08:46,182 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:08:46,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:08:46,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:08:46,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:08:46,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:46" (1/1) ... [2022-11-02 20:08:46,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:46" (1/1) ... [2022-11-02 20:08:46,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:46" (1/1) ... [2022-11-02 20:08:46,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:46" (1/1) ... [2022-11-02 20:08:46,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:46" (1/1) ... [2022-11-02 20:08:46,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:46" (1/1) ... [2022-11-02 20:08:46,208 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:46" (1/1) ... [2022-11-02 20:08:46,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:46" (1/1) ... [2022-11-02 20:08:46,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:08:46,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:08:46,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:08:46,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:08:46,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:46" (1/1) ... [2022-11-02 20:08:46,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:08:46,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:08:46,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:08:46,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:08:46,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:08:46,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:08:46,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:08:46,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:08:46,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:08:46,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:08:46,413 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:08:46,415 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:08:46,598 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:08:46,605 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:08:46,606 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 20:08:46,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:08:46 BoogieIcfgContainer [2022-11-02 20:08:46,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:08:46,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:08:46,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:08:46,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:08:46,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:08:45" (1/3) ... [2022-11-02 20:08:46,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@546a1467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:08:46, skipping insertion in model container [2022-11-02 20:08:46,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:08:46" (2/3) ... [2022-11-02 20:08:46,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@546a1467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:08:46, skipping insertion in model container [2022-11-02 20:08:46,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:08:46" (3/3) ... [2022-11-02 20:08:46,619 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2022-11-02 20:08:46,641 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:08:46,641 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-02 20:08:46,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:08:46,759 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3b2d7d2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:08:46,759 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-02 20:08:46,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-02 20:08:46,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:46,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-02 20:08:46,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:46,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:46,800 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2022-11-02 20:08:46,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:46,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798966071] [2022-11-02 20:08:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:46,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:08:47,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:47,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798966071] [2022-11-02 20:08:47,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798966071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:08:47,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:08:47,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:08:47,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169137567] [2022-11-02 20:08:47,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:08:47,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:08:47,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:47,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:08:47,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:08:47,222 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:47,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:47,279 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-11-02 20:08:47,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:08:47,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-02 20:08:47,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:47,292 INFO L225 Difference]: With dead ends: 59 [2022-11-02 20:08:47,292 INFO L226 Difference]: Without dead ends: 55 [2022-11-02 20:08:47,295 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 [2022-11-02 20:08:47,299 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:47,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:08:47,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-02 20:08:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2022-11-02 20:08:47,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 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) [2022-11-02 20:08:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-02 20:08:47,364 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2022-11-02 20:08:47,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:47,366 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-02 20:08:47,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:47,366 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-02 20:08:47,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:08:47,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:47,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:08:47,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:08:47,376 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:47,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:47,381 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2022-11-02 20:08:47,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:47,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582296875] [2022-11-02 20:08:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:47,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:08:47,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:47,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582296875] [2022-11-02 20:08:47,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582296875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:08:47,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:08:47,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:08:47,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161795757] [2022-11-02 20:08:47,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:08:47,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:08:47,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:47,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:08:47,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:08:47,579 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:47,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:47,637 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-11-02 20:08:47,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:08:47,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-02 20:08:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:47,639 INFO L225 Difference]: With dead ends: 58 [2022-11-02 20:08:47,639 INFO L226 Difference]: Without dead ends: 58 [2022-11-02 20:08:47,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:08:47,642 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:47,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:08:47,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-02 20:08:47,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2022-11-02 20:08:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-02 20:08:47,658 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-11-02 20:08:47,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:47,659 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-02 20:08:47,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-02 20:08:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:08:47,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:47,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:08:47,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:08:47,661 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:47,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:47,663 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2022-11-02 20:08:47,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:47,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125429567] [2022-11-02 20:08:47,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:47,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:08:47,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:47,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125429567] [2022-11-02 20:08:47,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125429567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:08:47,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:08:47,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:08:47,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487677133] [2022-11-02 20:08:47,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:08:47,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:08:47,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:47,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:08:47,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:08:47,889 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:47,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:47,978 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-11-02 20:08:47,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:08:47,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-02 20:08:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:47,981 INFO L225 Difference]: With dead ends: 32 [2022-11-02 20:08:47,982 INFO L226 Difference]: Without dead ends: 32 [2022-11-02 20:08:47,983 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 [2022-11-02 20:08:47,985 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:47,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:08:47,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-02 20:08:47,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-02 20:08:48,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-02 20:08:48,002 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2022-11-02 20:08:48,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:48,004 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-02 20:08:48,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-02 20:08:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:08:48,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:48,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:08:48,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:08:48,008 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:48,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:48,011 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2022-11-02 20:08:48,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:48,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194201045] [2022-11-02 20:08:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:48,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:08:48,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:48,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194201045] [2022-11-02 20:08:48,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194201045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:08:48,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:08:48,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:08:48,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113291382] [2022-11-02 20:08:48,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:08:48,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:08:48,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:48,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:08:48,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:08:48,237 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:48,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:48,325 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-11-02 20:08:48,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:08:48,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-02 20:08:48,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:48,327 INFO L225 Difference]: With dead ends: 55 [2022-11-02 20:08:48,327 INFO L226 Difference]: Without dead ends: 55 [2022-11-02 20:08:48,328 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 [2022-11-02 20:08:48,329 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:48,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:08:48,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-02 20:08:48,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2022-11-02 20:08:48,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:48,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-02 20:08:48,336 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-11-02 20:08:48,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:48,336 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-02 20:08:48,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:48,337 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-02 20:08:48,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:08:48,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:48,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:48,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:08:48,342 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:48,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:48,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2022-11-02 20:08:48,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:48,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520393588] [2022-11-02 20:08:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:48,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:08:48,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:48,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520393588] [2022-11-02 20:08:48,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520393588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:08:48,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:08:48,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:08:48,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438167293] [2022-11-02 20:08:48,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:08:48,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:08:48,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:48,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:08:48,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:08:48,440 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:48,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:48,562 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-11-02 20:08:48,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:08:48,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-02 20:08:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:48,568 INFO L225 Difference]: With dead ends: 60 [2022-11-02 20:08:48,568 INFO L226 Difference]: Without dead ends: 60 [2022-11-02 20:08:48,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:08:48,569 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:48,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 45 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:08:48,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-02 20:08:48,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2022-11-02 20:08:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:48,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-11-02 20:08:48,576 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2022-11-02 20:08:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:48,576 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-11-02 20:08:48,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:48,576 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-11-02 20:08:48,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 20:08:48,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:48,577 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:48,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:08:48,578 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:48,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:48,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2022-11-02 20:08:48,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:48,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696213770] [2022-11-02 20:08:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:48,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:08:48,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:48,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696213770] [2022-11-02 20:08:48,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696213770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:08:48,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107287011] [2022-11-02 20:08:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:48,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:48,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:08:48,644 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:08:48,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:08:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:48,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:08:48,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:08:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:08:48,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:08:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:08:48,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107287011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:08:48,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:08:48,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-02 20:08:48,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685223542] [2022-11-02 20:08:48,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:08:48,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:08:48,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:48,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:08:48,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:08:48,854 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2022-11-02 20:08:48,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:48,946 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2022-11-02 20:08:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:08:48,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) Word has length 10 [2022-11-02 20:08:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:48,949 INFO L225 Difference]: With dead ends: 130 [2022-11-02 20:08:48,949 INFO L226 Difference]: Without dead ends: 130 [2022-11-02 20:08:48,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:08:48,951 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 143 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:48,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 143 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:08:48,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-02 20:08:48,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2022-11-02 20:08:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-11-02 20:08:48,959 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 10 [2022-11-02 20:08:48,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:48,960 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-11-02 20:08:48,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2022-11-02 20:08:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-11-02 20:08:48,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 20:08:48,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:48,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:49,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:08:49,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:49,180 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:49,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:49,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2022-11-02 20:08:49,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:49,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065126923] [2022-11-02 20:08:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:49,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:08:49,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:49,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065126923] [2022-11-02 20:08:49,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065126923] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:08:49,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341454676] [2022-11-02 20:08:49,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:49,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:49,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:08:49,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:08:49,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:08:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:49,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:08:49,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:08:49,596 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:08:49,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-02 20:08:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:08:49,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:08:49,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:08:49,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341454676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:08:49,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:08:49,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-11-02 20:08:49,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950667653] [2022-11-02 20:08:49,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:08:49,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:08:49,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:49,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:08:49,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:08:49,858 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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) [2022-11-02 20:08:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:50,163 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2022-11-02 20:08:50,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:08:50,164 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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) Word has length 11 [2022-11-02 20:08:50,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:50,167 INFO L225 Difference]: With dead ends: 129 [2022-11-02 20:08:50,167 INFO L226 Difference]: Without dead ends: 129 [2022-11-02 20:08:50,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:08:50,172 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 396 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:50,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 100 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:08:50,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-02 20:08:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 49. [2022-11-02 20:08:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 48 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) [2022-11-02 20:08:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-11-02 20:08:50,197 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2022-11-02 20:08:50,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:50,198 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-11-02 20:08:50,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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) [2022-11-02 20:08:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-11-02 20:08:50,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:08:50,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:50,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:50,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:08:50,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:08:50,421 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:50,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:50,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2022-11-02 20:08:50,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:50,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324931329] [2022-11-02 20:08:50,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:50,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:08:50,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:50,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324931329] [2022-11-02 20:08:50,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324931329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:08:50,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825688118] [2022-11-02 20:08:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:50,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:50,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:08:50,494 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:08:50,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:08:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:50,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:08:50,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:08:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:08:50,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:08:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:08:50,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825688118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:08:50,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:08:50,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-02 20:08:50,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653140507] [2022-11-02 20:08:50,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:08:50,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:08:50,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:50,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:08:50,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:08:50,657 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:50,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:50,848 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-11-02 20:08:50,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:08:50,849 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-02 20:08:50,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:50,850 INFO L225 Difference]: With dead ends: 88 [2022-11-02 20:08:50,850 INFO L226 Difference]: Without dead ends: 88 [2022-11-02 20:08:50,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:08:50,851 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:50,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 52 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:08:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-02 20:08:50,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 48. [2022-11-02 20:08:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:50,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-11-02 20:08:50,856 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 12 [2022-11-02 20:08:50,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:50,856 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-11-02 20:08:50,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-11-02 20:08:50,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:08:50,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:50,857 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:50,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:08:51,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:08:51,067 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:51,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:51,067 INFO L85 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2022-11-02 20:08:51,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:51,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842877664] [2022-11-02 20:08:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:51,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:08:51,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:51,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842877664] [2022-11-02 20:08:51,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842877664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:08:51,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:08:51,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:08:51,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594729061] [2022-11-02 20:08:51,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:08:51,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:08:51,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:51,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:08:51,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:08:51,234 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:51,258 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-11-02 20:08:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:08:51,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:08:51,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:51,259 INFO L225 Difference]: With dead ends: 46 [2022-11-02 20:08:51,259 INFO L226 Difference]: Without dead ends: 46 [2022-11-02 20:08:51,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:08:51,261 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:51,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:08:51,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-02 20:08:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-02 20:08:51,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:51,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-11-02 20:08:51,265 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 17 [2022-11-02 20:08:51,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:51,266 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-11-02 20:08:51,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:51,266 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-11-02 20:08:51,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:08:51,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:51,267 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:51,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:08:51,267 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:51,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:51,268 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2022-11-02 20:08:51,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:51,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082742160] [2022-11-02 20:08:51,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:51,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:08:51,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:51,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082742160] [2022-11-02 20:08:51,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082742160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:08:51,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:08:51,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:08:51,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357370869] [2022-11-02 20:08:51,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:08:51,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:08:51,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:51,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:08:51,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:08:51,434 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:51,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:51,480 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-11-02 20:08:51,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:08:51,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:08:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:51,482 INFO L225 Difference]: With dead ends: 76 [2022-11-02 20:08:51,482 INFO L226 Difference]: Without dead ends: 76 [2022-11-02 20:08:51,482 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 [2022-11-02 20:08:51,483 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:51,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 46 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:08:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-02 20:08:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-11-02 20:08:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:51,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-11-02 20:08:51,508 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2022-11-02 20:08:51,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:51,508 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-11-02 20:08:51,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:51,509 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-11-02 20:08:51,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 20:08:51,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:51,513 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:51,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:08:51,513 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:51,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:51,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2022-11-02 20:08:51,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:51,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64288260] [2022-11-02 20:08:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:51,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:08:51,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:51,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64288260] [2022-11-02 20:08:51,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64288260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:08:51,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310053328] [2022-11-02 20:08:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:51,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:51,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:08:51,691 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:08:51,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:08:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:51,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:08:51,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:08:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:08:51,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:08:51,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-02 20:08:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:08:52,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310053328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:08:52,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:08:52,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-02 20:08:52,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944142237] [2022-11-02 20:08:52,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:08:52,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:08:52,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:52,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:08:52,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:08:52,091 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:52,210 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2022-11-02 20:08:52,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:08:52,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 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 23 [2022-11-02 20:08:52,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:52,211 INFO L225 Difference]: With dead ends: 80 [2022-11-02 20:08:52,212 INFO L226 Difference]: Without dead ends: 80 [2022-11-02 20:08:52,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:08:52,213 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:52,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 41 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:08:52,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-02 20:08:52,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2022-11-02 20:08:52,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:52,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-11-02 20:08:52,217 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2022-11-02 20:08:52,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:52,217 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-11-02 20:08:52,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:52,218 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-11-02 20:08:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:08:52,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:52,219 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2022-11-02 20:08:52,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:08:52,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:08:52,427 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:52,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2022-11-02 20:08:52,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:52,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157109699] [2022-11-02 20:08:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:52,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:08:52,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:52,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157109699] [2022-11-02 20:08:52,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157109699] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:08:52,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546882259] [2022-11-02 20:08:52,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:08:52,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:52,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:08:52,591 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:08:52,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:08:52,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:08:52,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:08:52,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:08:52,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:08:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:08:52,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:08:52,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546882259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:08:52,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:08:52,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-11-02 20:08:52,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727881373] [2022-11-02 20:08:52,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:08:52,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:08:52,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:52,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:08:52,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:08:52,785 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2022-11-02 20:08:52,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:52,903 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-11-02 20:08:52,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:08:52,904 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-02 20:08:52,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:52,904 INFO L225 Difference]: With dead ends: 86 [2022-11-02 20:08:52,905 INFO L226 Difference]: Without dead ends: 86 [2022-11-02 20:08:52,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:08:52,906 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:52,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 44 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:08:52,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-02 20:08:52,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2022-11-02 20:08:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 60 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:52,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-11-02 20:08:52,913 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2022-11-02 20:08:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:52,915 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-11-02 20:08:52,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2022-11-02 20:08:52,915 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-11-02 20:08:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:08:52,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:52,921 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:52,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:08:53,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:53,147 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:53,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:53,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2022-11-02 20:08:53,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:53,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651985847] [2022-11-02 20:08:53,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:53,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:08:53,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:53,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651985847] [2022-11-02 20:08:53,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651985847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:08:53,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893851861] [2022-11-02 20:08:53,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:53,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:53,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:08:53,362 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:08:53,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:08:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:53,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:08:53,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:08:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:08:53,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:08:53,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893851861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:08:53,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:08:53,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-02 20:08:53,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303791962] [2022-11-02 20:08:53,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:08:53,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:08:53,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:53,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:08:53,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:08:53,785 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2022-11-02 20:08:53,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:53,786 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-11-02 20:08:53,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:08:53,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-02 20:08:53,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:53,788 INFO L225 Difference]: With dead ends: 62 [2022-11-02 20:08:53,788 INFO L226 Difference]: Without dead ends: 60 [2022-11-02 20:08:53,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:08:53,789 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:53,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 39 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-11-02 20:08:53,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-02 20:08:53,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-02 20:08:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:53,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-11-02 20:08:53,797 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 26 [2022-11-02 20:08:53,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:53,798 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-11-02 20:08:53,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2022-11-02 20:08:53,798 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-11-02 20:08:53,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:08:53,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:53,799 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:53,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-02 20:08:54,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:54,013 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:54,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:54,013 INFO L85 PathProgramCache]: Analyzing trace with hash -271127104, now seen corresponding path program 1 times [2022-11-02 20:08:54,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:54,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820501931] [2022-11-02 20:08:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:54,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:08:54,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:54,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820501931] [2022-11-02 20:08:54,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820501931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:08:54,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291506849] [2022-11-02 20:08:54,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:54,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:54,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:08:54,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:08:54,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:08:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:54,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:08:54,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:08:54,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2022-11-02 20:08:54,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:08:54,516 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:08:54,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 10 [2022-11-02 20:08:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:08:54,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:08:54,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 12 [2022-11-02 20:08:54,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:08:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:08:54,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291506849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:08:54,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:08:54,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 22 [2022-11-02 20:08:54,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340535214] [2022-11-02 20:08:54,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:08:54,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:08:54,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:54,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:08:54,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:08:54,837 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:55,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:55,321 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2022-11-02 20:08:55,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:08:55,321 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-02 20:08:55,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:55,322 INFO L225 Difference]: With dead ends: 101 [2022-11-02 20:08:55,322 INFO L226 Difference]: Without dead ends: 101 [2022-11-02 20:08:55,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:08:55,324 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 83 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:55,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 156 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:08:55,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-02 20:08:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 66. [2022-11-02 20:08:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-11-02 20:08:55,327 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 27 [2022-11-02 20:08:55,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:55,328 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-11-02 20:08:55,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-11-02 20:08:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 20:08:55,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:55,333 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:55,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:08:55,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:08:55,555 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:55,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:55,555 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2022-11-02 20:08:55,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:55,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056563189] [2022-11-02 20:08:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:55,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:08:55,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:55,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056563189] [2022-11-02 20:08:55,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056563189] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:08:55,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707620166] [2022-11-02 20:08:55,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:55,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:55,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:08:55,819 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:08:55,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:08:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:55,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:08:55,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:08:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:08:56,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:08:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:08:56,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707620166] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:08:56,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:08:56,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-11-02 20:08:56,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608642287] [2022-11-02 20:08:56,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:08:56,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:08:56,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:56,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:08:56,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:08:56,183 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:56,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:56,487 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-11-02 20:08:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:08:56,488 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-02 20:08:56,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:56,489 INFO L225 Difference]: With dead ends: 66 [2022-11-02 20:08:56,489 INFO L226 Difference]: Without dead ends: 66 [2022-11-02 20:08:56,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:08:56,493 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:56,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 71 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:08:56,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-02 20:08:56,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-02 20:08:56,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 65 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:56,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-11-02 20:08:56,497 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 34 [2022-11-02 20:08:56,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:56,499 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-11-02 20:08:56,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:56,500 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-11-02 20:08:56,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 20:08:56,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:56,502 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:56,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:08:56,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:08:56,719 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:56,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:56,720 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2022-11-02 20:08:56,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:56,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047464673] [2022-11-02 20:08:56,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:56,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:08:57,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:57,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047464673] [2022-11-02 20:08:57,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047464673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:08:57,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143240337] [2022-11-02 20:08:57,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:08:57,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:57,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:08:57,170 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:08:57,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:08:57,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:08:57,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:08:57,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:08:57,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:08:57,300 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:08:57,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-02 20:08:57,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:08:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:08:57,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:08:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:08:57,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143240337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:08:57,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:08:57,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 3] total 10 [2022-11-02 20:08:57,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094240196] [2022-11-02 20:08:57,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:08:57,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:08:57,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:57,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:08:57,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:08:57,879 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:58,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:58,090 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2022-11-02 20:08:58,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:08:58,091 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-02 20:08:58,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:58,092 INFO L225 Difference]: With dead ends: 158 [2022-11-02 20:08:58,092 INFO L226 Difference]: Without dead ends: 158 [2022-11-02 20:08:58,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:08:58,093 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 51 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:58,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 93 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:08:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-02 20:08:58,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2022-11-02 20:08:58,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.1517241379310346) internal successors, (167), 149 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 167 transitions. [2022-11-02 20:08:58,108 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 167 transitions. Word has length 39 [2022-11-02 20:08:58,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:58,109 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 167 transitions. [2022-11-02 20:08:58,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 167 transitions. [2022-11-02 20:08:58,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-02 20:08:58,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:58,109 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:58,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:08:58,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:08:58,311 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:58,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:58,312 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2022-11-02 20:08:58,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:58,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172124739] [2022-11-02 20:08:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:58,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:08:58,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:58,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172124739] [2022-11-02 20:08:58,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172124739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:08:58,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180249635] [2022-11-02 20:08:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:58,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:58,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:08:58,575 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:08:58,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:08:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:58,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:08:58,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:08:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:08:58,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:08:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:08:58,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180249635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:08:58,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:08:58,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-11-02 20:08:58,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795908457] [2022-11-02 20:08:58,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:08:58,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:08:58,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:08:58,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:08:58,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:08:58,971 INFO L87 Difference]: Start difference. First operand 150 states and 167 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:08:59,320 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2022-11-02 20:08:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:08:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-02 20:08:59,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:08:59,322 INFO L225 Difference]: With dead ends: 165 [2022-11-02 20:08:59,322 INFO L226 Difference]: Without dead ends: 165 [2022-11-02 20:08:59,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:08:59,323 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 165 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:08:59,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 67 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:08:59,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-02 20:08:59,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 143. [2022-11-02 20:08:59,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 142 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2022-11-02 20:08:59,328 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 42 [2022-11-02 20:08:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:08:59,329 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2022-11-02 20:08:59,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:08:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2022-11-02 20:08:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-02 20:08:59,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:08:59,330 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:08:59,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:08:59,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:08:59,547 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:08:59,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:08:59,547 INFO L85 PathProgramCache]: Analyzing trace with hash -255177540, now seen corresponding path program 2 times [2022-11-02 20:08:59,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:08:59,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948585019] [2022-11-02 20:08:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:08:59,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:08:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:08:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:08:59,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:08:59,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948585019] [2022-11-02 20:08:59,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948585019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:08:59,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853452851] [2022-11-02 20:08:59,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:08:59,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:08:59,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:08:59,818 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:08:59,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:08:59,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:08:59,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:08:59,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:08:59,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:09:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:09:00,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:09:00,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2022-11-02 20:09:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:09:00,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853452851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:09:00,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:09:00,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2022-11-02 20:09:00,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922745305] [2022-11-02 20:09:00,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:09:00,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:09:00,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:09:00,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:09:00,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:09:00,591 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:09:00,759 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2022-11-02 20:09:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:09:00,760 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 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 49 [2022-11-02 20:09:00,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:09:00,761 INFO L225 Difference]: With dead ends: 146 [2022-11-02 20:09:00,761 INFO L226 Difference]: Without dead ends: 146 [2022-11-02 20:09:00,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:09:00,762 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 216 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:09:00,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 80 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:09:00,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-02 20:09:00,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2022-11-02 20:09:00,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.129496402877698) internal successors, (157), 143 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:00,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 157 transitions. [2022-11-02 20:09:00,768 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 157 transitions. Word has length 49 [2022-11-02 20:09:00,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:09:00,768 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 157 transitions. [2022-11-02 20:09:00,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:00,769 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 157 transitions. [2022-11-02 20:09:00,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-02 20:09:00,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:09:00,770 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-02 20:09:00,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:09:00,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:09:00,980 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:09:00,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:09:00,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1256352513, now seen corresponding path program 3 times [2022-11-02 20:09:00,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:09:00,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222202856] [2022-11-02 20:09:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:09:00,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:09:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-02 20:09:01,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:09:01,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222202856] [2022-11-02 20:09:01,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222202856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:09:01,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796974761] [2022-11-02 20:09:01,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:09:01,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:01,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:09:01,345 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:09:01,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:09:01,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:09:01,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:09:01,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 20:09:01,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:09:01,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:09:01,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-02 20:09:01,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:09:01,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 3 [2022-11-02 20:09:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-02 20:09:01,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:09:01,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796974761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:09:01,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:09:01,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2022-11-02 20:09:01,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609520412] [2022-11-02 20:09:01,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:09:01,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:09:01,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:09:01,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:09:01,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:09:01,855 INFO L87 Difference]: Start difference. First operand 144 states and 157 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:09:01,919 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2022-11-02 20:09:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:09:01,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-02 20:09:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:09:01,920 INFO L225 Difference]: With dead ends: 142 [2022-11-02 20:09:01,921 INFO L226 Difference]: Without dead ends: 142 [2022-11-02 20:09:01,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:09:01,922 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:09:01,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 31 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:09:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-02 20:09:01,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 80. [2022-11-02 20:09:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.077922077922078) internal successors, (83), 79 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:01,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-11-02 20:09:01,926 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 53 [2022-11-02 20:09:01,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:09:01,927 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-11-02 20:09:01,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:01,927 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-11-02 20:09:01,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-02 20:09:01,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:09:01,928 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:09:01,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:09:02,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:02,132 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:09:02,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:09:02,133 INFO L85 PathProgramCache]: Analyzing trace with hash -292223690, now seen corresponding path program 1 times [2022-11-02 20:09:02,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:09:02,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150390421] [2022-11-02 20:09:02,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:09:02,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:09:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-02 20:09:02,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:09:02,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150390421] [2022-11-02 20:09:02,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150390421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:09:02,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064367973] [2022-11-02 20:09:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:09:02,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:02,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:09:02,333 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:09:02,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:09:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:02,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:09:02,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:09:02,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 11 [2022-11-02 20:09:02,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:09:02,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 [2022-11-02 20:09:02,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 7 [2022-11-02 20:09:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:09:02,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:09:05,156 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_51| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_51|)) (forall ((v_ArrVal_332 Int)) (< 1 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_51| 4)) v_ArrVal_332) |c_ULTIMATE.start_main_~#b~0#1.offset|))))) is different from false [2022-11-02 20:09:05,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 19 [2022-11-02 20:09:05,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 56 treesize of output 54 [2022-11-02 20:09:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 42 refuted. 0 times theorem prover too weak. 20 trivial. 2 not checked. [2022-11-02 20:09:05,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064367973] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:09:05,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:09:05,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 13] total 25 [2022-11-02 20:09:05,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854923614] [2022-11-02 20:09:05,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:09:05,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 20:09:05,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:09:05,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 20:09:05,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=451, Unknown=1, NotChecked=44, Total=600 [2022-11-02 20:09:05,435 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:07,613 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|))) (and (forall ((|v_ULTIMATE.start_main_~i~1#1_51| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_51|)) (forall ((v_ArrVal_332 Int)) (< 1 (select (store .cse0 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_51| 4)) v_ArrVal_332) |c_ULTIMATE.start_main_~#b~0#1.offset|))))) (<= 2 (select .cse0 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)))) (<= 2 |c_ULTIMATE.start_main_#t~ret3#1|) (= |c_ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |c_ULTIMATE.start_foo_#res#1|) (= |c_ULTIMATE.start_main_~i~1#1| 0) (<= 2 |c_ULTIMATE.start_foo_~i~0#1|))) is different from false [2022-11-02 20:09:09,617 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|))) (and (forall ((|v_ULTIMATE.start_main_~i~1#1_51| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_51|)) (forall ((v_ArrVal_332 Int)) (< 1 (select (store .cse0 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_51| 4)) v_ArrVal_332) |c_ULTIMATE.start_main_~#b~0#1.offset|))))) (<= 2 (select .cse0 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)))) (= |c_ULTIMATE.start_main_~#b~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~1#1| 0))) is different from false [2022-11-02 20:09:09,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:09:09,705 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2022-11-02 20:09:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:09:09,706 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-02 20:09:09,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:09:09,706 INFO L225 Difference]: With dead ends: 71 [2022-11-02 20:09:09,706 INFO L226 Difference]: Without dead ends: 67 [2022-11-02 20:09:09,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=148, Invalid=563, Unknown=3, NotChecked=156, Total=870 [2022-11-02 20:09:09,708 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:09:09,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 52 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 256 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-11-02 20:09:09,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-02 20:09:09,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-02 20:09:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:09,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-11-02 20:09:09,710 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 54 [2022-11-02 20:09:09,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:09:09,711 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-11-02 20:09:09,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:09,711 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-11-02 20:09:09,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-02 20:09:09,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:09:09,712 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-11-02 20:09:09,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-02 20:09:09,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:09,921 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:09:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:09:09,921 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2022-11-02 20:09:09,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:09:09,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144382366] [2022-11-02 20:09:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:09:09,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:09:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 117 proven. 102 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:09:10,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:09:10,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144382366] [2022-11-02 20:09:10,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144382366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:09:10,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997705538] [2022-11-02 20:09:10,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:09:10,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:10,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:09:10,300 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:09:10,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:09:10,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:09:10,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:09:10,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:09:10,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:09:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:09:10,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:09:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:09:10,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997705538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:09:10,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:09:10,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 20 [2022-11-02 20:09:10,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106828929] [2022-11-02 20:09:10,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:09:10,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:09:10,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:09:10,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:09:10,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:09:10,945 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:11,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:09:11,632 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2022-11-02 20:09:11,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:09:11,633 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-02 20:09:11,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:09:11,634 INFO L225 Difference]: With dead ends: 108 [2022-11-02 20:09:11,634 INFO L226 Difference]: Without dead ends: 108 [2022-11-02 20:09:11,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 114 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:09:11,635 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 190 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:09:11,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 73 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:09:11,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-02 20:09:11,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2022-11-02 20:09:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.0543478260869565) internal successors, (97), 93 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:11,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-11-02 20:09:11,638 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 64 [2022-11-02 20:09:11,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:09:11,638 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-11-02 20:09:11,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:11,639 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-11-02 20:09:11,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 20:09:11,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:09:11,639 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-11-02 20:09:11,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:09:11,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:11,851 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:09:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:09:11,851 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2022-11-02 20:09:11,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:09:11,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003896291] [2022-11-02 20:09:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:09:11,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:09:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-02 20:09:12,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:09:12,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003896291] [2022-11-02 20:09:12,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003896291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:09:12,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287201833] [2022-11-02 20:09:12,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:09:12,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:12,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:09:12,059 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:09:12,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:09:12,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-02 20:09:12,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:09:12,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:09:12,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:09:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-02 20:09:12,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:09:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-02 20:09:12,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287201833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:09:12,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:09:12,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-11-02 20:09:12,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997984643] [2022-11-02 20:09:12,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:09:12,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:09:12,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:09:12,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:09:12,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:09:12,486 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:12,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:09:12,806 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2022-11-02 20:09:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:09:12,809 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-02 20:09:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:09:12,810 INFO L225 Difference]: With dead ends: 164 [2022-11-02 20:09:12,811 INFO L226 Difference]: Without dead ends: 164 [2022-11-02 20:09:12,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:09:12,812 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 278 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:09:12,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 99 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:09:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-02 20:09:12,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 123. [2022-11-02 20:09:12,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 121 states have (on average 1.1322314049586777) internal successors, (137), 122 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2022-11-02 20:09:12,816 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 91 [2022-11-02 20:09:12,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:09:12,816 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2022-11-02 20:09:12,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2022-11-02 20:09:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:09:12,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:09:12,817 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-11-02 20:09:12,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:09:13,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-02 20:09:13,033 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:09:13,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:09:13,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2022-11-02 20:09:13,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:09:13,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271496392] [2022-11-02 20:09:13,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:09:13,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:09:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:13,520 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-02 20:09:13,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:09:13,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271496392] [2022-11-02 20:09:13,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271496392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:09:13,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567077951] [2022-11-02 20:09:13,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:09:13,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:13,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:09:13,523 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:09:13,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:09:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:13,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:09:13,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:09:13,684 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:09:13,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-02 20:09:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-02 20:09:14,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:09:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-02 20:09:14,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567077951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:09:14,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:09:14,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2022-11-02 20:09:14,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757624874] [2022-11-02 20:09:14,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:09:14,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:09:14,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:09:14,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:09:14,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:09:14,837 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:09:15,423 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2022-11-02 20:09:15,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:09:15,424 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 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 92 [2022-11-02 20:09:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:09:15,425 INFO L225 Difference]: With dead ends: 160 [2022-11-02 20:09:15,425 INFO L226 Difference]: Without dead ends: 160 [2022-11-02 20:09:15,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:09:15,426 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 224 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:09:15,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 90 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:09:15,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-02 20:09:15,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 124. [2022-11-02 20:09:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 122 states have (on average 1.0901639344262295) internal successors, (133), 123 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2022-11-02 20:09:15,429 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 92 [2022-11-02 20:09:15,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:09:15,429 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2022-11-02 20:09:15,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2022-11-02 20:09:15,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-02 20:09:15,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:09:15,431 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-11-02 20:09:15,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:09:15,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-02 20:09:15,631 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:09:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:09:15,632 INFO L85 PathProgramCache]: Analyzing trace with hash 129325764, now seen corresponding path program 4 times [2022-11-02 20:09:15,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:09:15,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999500618] [2022-11-02 20:09:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:09:15,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:09:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 470 proven. 378 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-02 20:09:16,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:09:16,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999500618] [2022-11-02 20:09:16,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999500618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:09:16,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501759537] [2022-11-02 20:09:16,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:09:16,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:16,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:09:16,215 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:09:16,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:09:16,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:09:16,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:09:16,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:09:16,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:09:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-02 20:09:17,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:09:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-02 20:09:17,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501759537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:09:17,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:09:17,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 38 [2022-11-02 20:09:17,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123290144] [2022-11-02 20:09:17,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:09:17,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 20:09:17,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:09:17,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 20:09:17,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 20:09:17,605 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand has 38 states, 38 states have (on average 5.842105263157895) internal successors, (222), 38 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:20,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:09:20,264 INFO L93 Difference]: Finished difference Result 371 states and 404 transitions. [2022-11-02 20:09:20,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-02 20:09:20,265 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.842105263157895) internal successors, (222), 38 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-11-02 20:09:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:09:20,267 INFO L225 Difference]: With dead ends: 371 [2022-11-02 20:09:20,267 INFO L226 Difference]: Without dead ends: 371 [2022-11-02 20:09:20,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 214 SyntacticMatches, 6 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3648 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2257, Invalid=8045, Unknown=0, NotChecked=0, Total=10302 [2022-11-02 20:09:20,272 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 536 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:09:20,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 109 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:09:20,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-02 20:09:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 354. [2022-11-02 20:09:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 352 states have (on average 1.0994318181818181) internal successors, (387), 353 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:20,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 387 transitions. [2022-11-02 20:09:20,281 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 387 transitions. Word has length 121 [2022-11-02 20:09:20,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:09:20,281 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 387 transitions. [2022-11-02 20:09:20,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.842105263157895) internal successors, (222), 38 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:20,282 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 387 transitions. [2022-11-02 20:09:20,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-11-02 20:09:20,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:09:20,285 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 44, 44, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-11-02 20:09:20,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-02 20:09:20,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-02 20:09:20,505 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:09:20,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:09:20,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1597142136, now seen corresponding path program 5 times [2022-11-02 20:09:20,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:09:20,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290905969] [2022-11-02 20:09:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:09:20,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:09:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3266 proven. 218 refuted. 0 times theorem prover too weak. 1898 trivial. 0 not checked. [2022-11-02 20:09:21,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:09:21,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290905969] [2022-11-02 20:09:21,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290905969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:09:21,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059998422] [2022-11-02 20:09:21,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:09:21,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:21,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:09:21,717 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:09:21,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:09:21,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-02 20:09:21,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:09:21,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:09:21,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:09:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3117 proven. 501 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2022-11-02 20:09:22,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:09:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3230 proven. 388 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2022-11-02 20:09:23,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059998422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:09:23,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:09:23,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2022-11-02 20:09:23,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674511775] [2022-11-02 20:09:23,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:09:23,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 20:09:23,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:09:23,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 20:09:23,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 20:09:23,076 INFO L87 Difference]: Start difference. First operand 354 states and 387 transitions. Second operand has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:24,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:09:24,372 INFO L93 Difference]: Finished difference Result 354 states and 369 transitions. [2022-11-02 20:09:24,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 20:09:24,372 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 0 states have call successors, (0), 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 281 [2022-11-02 20:09:24,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:09:24,374 INFO L225 Difference]: With dead ends: 354 [2022-11-02 20:09:24,375 INFO L226 Difference]: Without dead ends: 354 [2022-11-02 20:09:24,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 537 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=866, Invalid=3040, Unknown=0, NotChecked=0, Total=3906 [2022-11-02 20:09:24,377 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 151 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:09:24,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 99 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:09:24,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-02 20:09:24,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2022-11-02 20:09:24,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 352 states have (on average 1.0482954545454546) internal successors, (369), 353 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 369 transitions. [2022-11-02 20:09:24,386 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 369 transitions. Word has length 281 [2022-11-02 20:09:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:09:24,387 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 369 transitions. [2022-11-02 20:09:24,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 369 transitions. [2022-11-02 20:09:24,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-11-02 20:09:24,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:09:24,393 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 48, 48, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-11-02 20:09:24,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:09:24,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:24,607 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:09:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:09:24,607 INFO L85 PathProgramCache]: Analyzing trace with hash 763391400, now seen corresponding path program 6 times [2022-11-02 20:09:24,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:09:24,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368630294] [2022-11-02 20:09:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:09:24,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:09:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4200 proven. 311 refuted. 0 times theorem prover too weak. 1821 trivial. 0 not checked. [2022-11-02 20:09:25,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:09:25,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368630294] [2022-11-02 20:09:25,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368630294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:09:25,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693494024] [2022-11-02 20:09:25,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:09:25,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:25,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:09:25,985 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:09:26,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:09:26,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-11-02 20:09:26,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:09:26,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:09:26,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:09:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4137 proven. 736 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2022-11-02 20:09:27,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:09:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4137 proven. 736 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2022-11-02 20:09:27,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693494024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:09:27,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:09:27,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 36 [2022-11-02 20:09:27,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487841786] [2022-11-02 20:09:27,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:09:27,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-02 20:09:27,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:09:27,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-02 20:09:27,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:09:27,685 INFO L87 Difference]: Start difference. First operand 354 states and 369 transitions. Second operand has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:29,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:09:29,871 INFO L93 Difference]: Finished difference Result 354 states and 365 transitions. [2022-11-02 20:09:29,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-02 20:09:29,871 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 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 301 [2022-11-02 20:09:29,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:09:29,873 INFO L225 Difference]: With dead ends: 354 [2022-11-02 20:09:29,873 INFO L226 Difference]: Without dead ends: 354 [2022-11-02 20:09:29,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 579 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=899, Invalid=3793, Unknown=0, NotChecked=0, Total=4692 [2022-11-02 20:09:29,876 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 128 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:09:29,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 109 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:09:29,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-02 20:09:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2022-11-02 20:09:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 352 states have (on average 1.0369318181818181) internal successors, (365), 353 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:29,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 365 transitions. [2022-11-02 20:09:29,885 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 365 transitions. Word has length 301 [2022-11-02 20:09:29,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:09:29,885 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 365 transitions. [2022-11-02 20:09:29,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:29,886 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 365 transitions. [2022-11-02 20:09:29,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-11-02 20:09:29,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:09:29,892 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 51, 51, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-11-02 20:09:29,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-02 20:09:30,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-02 20:09:30,119 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:09:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:09:30,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1134310783, now seen corresponding path program 7 times [2022-11-02 20:09:30,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:09:30,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074180652] [2022-11-02 20:09:30,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:09:30,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:09:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4815 proven. 419 refuted. 0 times theorem prover too weak. 1863 trivial. 0 not checked. [2022-11-02 20:09:31,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:09:31,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074180652] [2022-11-02 20:09:31,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074180652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:09:31,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987270910] [2022-11-02 20:09:31,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:09:31,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:31,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:09:31,635 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:09:31,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:09:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:31,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:09:31,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:09:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4920 proven. 1132 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2022-11-02 20:09:32,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:09:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4920 proven. 1132 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2022-11-02 20:09:33,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987270910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:09:33,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:09:33,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 41 [2022-11-02 20:09:33,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184216870] [2022-11-02 20:09:33,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:09:33,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-02 20:09:33,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:09:33,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-02 20:09:33,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 20:09:33,522 INFO L87 Difference]: Start difference. First operand 354 states and 365 transitions. Second operand has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:36,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:09:36,517 INFO L93 Difference]: Finished difference Result 406 states and 414 transitions. [2022-11-02 20:09:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-02 20:09:36,518 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 316 [2022-11-02 20:09:36,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:09:36,520 INFO L225 Difference]: With dead ends: 406 [2022-11-02 20:09:36,520 INFO L226 Difference]: Without dead ends: 406 [2022-11-02 20:09:36,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 605 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1270, Invalid=5536, Unknown=0, NotChecked=0, Total=6806 [2022-11-02 20:09:36,524 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 136 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 2782 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:09:36,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 217 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2782 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 20:09:36,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-11-02 20:09:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 396. [2022-11-02 20:09:36,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 394 states have (on average 1.0253807106598984) internal successors, (404), 395 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 404 transitions. [2022-11-02 20:09:36,533 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 404 transitions. Word has length 316 [2022-11-02 20:09:36,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:09:36,534 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 404 transitions. [2022-11-02 20:09:36,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:36,534 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 404 transitions. [2022-11-02 20:09:36,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-11-02 20:09:36,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:09:36,541 INFO L195 NwaCegarLoop]: trace histogram [54, 53, 53, 53, 53, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-11-02 20:09:36,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:09:36,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-02 20:09:36,763 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:09:36,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:09:36,763 INFO L85 PathProgramCache]: Analyzing trace with hash -25370281, now seen corresponding path program 8 times [2022-11-02 20:09:36,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:09:36,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007450865] [2022-11-02 20:09:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:09:36,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:09:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 4817 proven. 542 refuted. 0 times theorem prover too weak. 2273 trivial. 0 not checked. [2022-11-02 20:09:38,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:09:38,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007450865] [2022-11-02 20:09:38,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007450865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:09:38,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966208077] [2022-11-02 20:09:38,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:09:38,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:38,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:09:38,291 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:09:38,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:09:38,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:09:38,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:09:38,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:09:38,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:09:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 5286 proven. 1646 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-11-02 20:09:39,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:09:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 5286 proven. 1646 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-11-02 20:09:40,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966208077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:09:40,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:09:40,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 46 [2022-11-02 20:09:40,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661284005] [2022-11-02 20:09:40,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:09:40,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-02 20:09:40,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:09:40,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-02 20:09:40,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1708, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 20:09:40,543 INFO L87 Difference]: Start difference. First operand 396 states and 404 transitions. Second operand has 46 states, 46 states have (on average 6.065217391304348) internal successors, (279), 46 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:44,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:09:44,027 INFO L93 Difference]: Finished difference Result 453 states and 459 transitions. [2022-11-02 20:09:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-02 20:09:44,027 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.065217391304348) internal successors, (279), 46 states have internal predecessors, (279), 0 states have call successors, (0), 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 326 [2022-11-02 20:09:44,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:09:44,030 INFO L225 Difference]: With dead ends: 453 [2022-11-02 20:09:44,030 INFO L226 Difference]: Without dead ends: 453 [2022-11-02 20:09:44,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 621 SyntacticMatches, 8 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2340 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1739, Invalid=7767, Unknown=0, NotChecked=0, Total=9506 [2022-11-02 20:09:44,034 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 165 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:09:44,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 139 Invalid, 2564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-02 20:09:44,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-11-02 20:09:44,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 443. [2022-11-02 20:09:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 441 states have (on average 1.018140589569161) internal successors, (449), 442 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 449 transitions. [2022-11-02 20:09:44,045 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 449 transitions. Word has length 326 [2022-11-02 20:09:44,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:09:44,046 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 449 transitions. [2022-11-02 20:09:44,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.065217391304348) internal successors, (279), 46 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:44,047 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 449 transitions. [2022-11-02 20:09:44,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-11-02 20:09:44,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:09:44,050 INFO L195 NwaCegarLoop]: trace histogram [55, 54, 54, 54, 54, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-11-02 20:09:44,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:09:44,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:44,275 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:09:44,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:09:44,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1065134024, now seen corresponding path program 9 times [2022-11-02 20:09:44,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:09:44,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287209474] [2022-11-02 20:09:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:09:44,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:09:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 3828 proven. 705 refuted. 0 times theorem prover too weak. 3374 trivial. 0 not checked. [2022-11-02 20:09:45,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:09:45,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287209474] [2022-11-02 20:09:45,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287209474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:09:45,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938916102] [2022-11-02 20:09:45,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:09:45,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:45,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:09:45,989 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:09:46,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-02 20:09:46,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-02 20:09:46,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:09:46,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:09:46,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:09:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 2376 proven. 245 refuted. 0 times theorem prover too weak. 5286 trivial. 0 not checked. [2022-11-02 20:09:46,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:09:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 2376 proven. 245 refuted. 0 times theorem prover too weak. 5286 trivial. 0 not checked. [2022-11-02 20:09:47,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938916102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:09:47,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:09:47,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 49 [2022-11-02 20:09:47,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600398606] [2022-11-02 20:09:47,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:09:47,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-02 20:09:47,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:09:47,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-02 20:09:47,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=1769, Unknown=0, NotChecked=0, Total=2352 [2022-11-02 20:09:47,315 INFO L87 Difference]: Start difference. First operand 443 states and 449 transitions. Second operand has 49 states, 49 states have (on average 4.591836734693878) internal successors, (225), 49 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:50,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:09:50,614 INFO L93 Difference]: Finished difference Result 699 states and 718 transitions. [2022-11-02 20:09:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-02 20:09:50,615 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.591836734693878) internal successors, (225), 49 states have internal predecessors, (225), 0 states have call successors, (0), 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 331 [2022-11-02 20:09:50,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:09:50,619 INFO L225 Difference]: With dead ends: 699 [2022-11-02 20:09:50,619 INFO L226 Difference]: Without dead ends: 699 [2022-11-02 20:09:50,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3611 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3586, Invalid=9754, Unknown=0, NotChecked=0, Total=13340 [2022-11-02 20:09:50,623 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1277 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:09:50,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 118 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:09:50,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-11-02 20:09:50,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 502. [2022-11-02 20:09:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 500 states have (on average 1.062) internal successors, (531), 501 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:50,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 531 transitions. [2022-11-02 20:09:50,641 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 531 transitions. Word has length 331 [2022-11-02 20:09:50,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:09:50,642 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 531 transitions. [2022-11-02 20:09:50,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.591836734693878) internal successors, (225), 49 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:50,643 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 531 transitions. [2022-11-02 20:09:50,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-11-02 20:09:50,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:09:50,645 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 56, 56, 56, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-11-02 20:09:50,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:09:50,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-02 20:09:50,855 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:09:50,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:09:50,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1489328682, now seen corresponding path program 2 times [2022-11-02 20:09:50,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:09:50,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772359782] [2022-11-02 20:09:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:09:50,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:09:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8528 backedges. 5854 proven. 408 refuted. 0 times theorem prover too weak. 2266 trivial. 0 not checked. [2022-11-02 20:09:52,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:09:52,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772359782] [2022-11-02 20:09:52,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772359782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:09:52,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397063845] [2022-11-02 20:09:52,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:09:52,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:52,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:09:52,339 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:09:52,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-02 20:09:52,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:09:52,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:09:52,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:09:52,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:09:52,562 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:09:52,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-02 20:09:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8528 backedges. 10 proven. 2526 refuted. 0 times theorem prover too weak. 5992 trivial. 0 not checked. [2022-11-02 20:09:54,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:09:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8528 backedges. 0 proven. 2536 refuted. 0 times theorem prover too weak. 5992 trivial. 0 not checked. [2022-11-02 20:09:56,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397063845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:09:56,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:09:56,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 4, 4] total 27 [2022-11-02 20:09:56,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55627862] [2022-11-02 20:09:56,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:09:56,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 20:09:56,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:09:56,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 20:09:56,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:09:56,040 INFO L87 Difference]: Start difference. First operand 502 states and 531 transitions. Second operand has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 27 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:57,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:09:57,865 INFO L93 Difference]: Finished difference Result 501 states and 517 transitions. [2022-11-02 20:09:57,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-02 20:09:57,865 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 27 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 342 [2022-11-02 20:09:57,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:09:57,868 INFO L225 Difference]: With dead ends: 501 [2022-11-02 20:09:57,868 INFO L226 Difference]: Without dead ends: 501 [2022-11-02 20:09:57,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 680 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=984, Invalid=2798, Unknown=0, NotChecked=0, Total=3782 [2022-11-02 20:09:57,869 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 618 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:09:57,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 42 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:09:57,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-02 20:09:57,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 449. [2022-11-02 20:09:57,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.0379464285714286) internal successors, (465), 448 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:57,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 465 transitions. [2022-11-02 20:09:57,894 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 465 transitions. Word has length 342 [2022-11-02 20:09:57,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:09:57,896 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 465 transitions. [2022-11-02 20:09:57,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 27 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:09:57,897 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 465 transitions. [2022-11-02 20:09:57,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-11-02 20:09:57,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:09:57,900 INFO L195 NwaCegarLoop]: trace histogram [71, 70, 70, 70, 70, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-11-02 20:09:57,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:09:58,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:58,123 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:09:58,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:09:58,123 INFO L85 PathProgramCache]: Analyzing trace with hash -935388728, now seen corresponding path program 10 times [2022-11-02 20:09:58,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:09:58,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422301520] [2022-11-02 20:09:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:09:58,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:09:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:09:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12987 backedges. 6122 proven. 217 refuted. 0 times theorem prover too weak. 6648 trivial. 0 not checked. [2022-11-02 20:09:59,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:09:59,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422301520] [2022-11-02 20:09:59,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422301520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:09:59,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248247276] [2022-11-02 20:09:59,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:09:59,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:09:59,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:09:59,456 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:09:59,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-02 20:10:00,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:10:00,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:10:00,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:10:00,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:10:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12987 backedges. 6467 proven. 1800 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2022-11-02 20:10:01,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:10:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12987 backedges. 6467 proven. 1800 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2022-11-02 20:10:01,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248247276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:10:01,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:10:01,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 37 [2022-11-02 20:10:01,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168075395] [2022-11-02 20:10:01,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:10:01,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 20:10:01,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:10:01,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 20:10:01,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:10:01,732 INFO L87 Difference]: Start difference. First operand 449 states and 465 transitions. Second operand has 37 states, 37 states have (on average 5.972972972972973) internal successors, (221), 37 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:10:03,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:10:03,232 INFO L93 Difference]: Finished difference Result 449 states and 464 transitions. [2022-11-02 20:10:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-02 20:10:03,232 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.972972972972973) internal successors, (221), 37 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 411 [2022-11-02 20:10:03,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:10:03,234 INFO L225 Difference]: With dead ends: 449 [2022-11-02 20:10:03,235 INFO L226 Difference]: Without dead ends: 449 [2022-11-02 20:10:03,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 797 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1098, Invalid=4304, Unknown=0, NotChecked=0, Total=5402 [2022-11-02 20:10:03,237 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 552 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:10:03,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 100 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:10:03,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-11-02 20:10:03,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 449. [2022-11-02 20:10:03,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.0357142857142858) internal successors, (464), 448 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:10:03,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 464 transitions. [2022-11-02 20:10:03,248 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 464 transitions. Word has length 411 [2022-11-02 20:10:03,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:10:03,248 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 464 transitions. [2022-11-02 20:10:03,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.972972972972973) internal successors, (221), 37 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:10:03,249 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 464 transitions. [2022-11-02 20:10:03,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2022-11-02 20:10:03,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:10:03,252 INFO L195 NwaCegarLoop]: trace histogram [77, 76, 76, 76, 76, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-11-02 20:10:03,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-02 20:10:03,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-02 20:10:03,467 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:10:03,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:10:03,467 INFO L85 PathProgramCache]: Analyzing trace with hash -205352877, now seen corresponding path program 11 times [2022-11-02 20:10:03,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:10:03,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724395570] [2022-11-02 20:10:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:10:03,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:10:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:10:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 7790 proven. 1983 refuted. 0 times theorem prover too weak. 5583 trivial. 0 not checked. [2022-11-02 20:10:05,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:10:05,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724395570] [2022-11-02 20:10:05,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724395570] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:10:05,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45787384] [2022-11-02 20:10:05,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:10:05,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:10:05,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:10:05,395 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:10:05,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-02 20:10:06,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-11-02 20:10:06,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:10:06,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-02 20:10:06,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:10:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 2150 proven. 12344 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2022-11-02 20:10:09,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:10:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 2107 proven. 12387 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2022-11-02 20:10:10,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45787384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:10:10,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:10:10,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 39, 39] total 87 [2022-11-02 20:10:10,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540682413] [2022-11-02 20:10:10,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:10:10,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-11-02 20:10:10,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:10:10,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-11-02 20:10:10,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1517, Invalid=5965, Unknown=0, NotChecked=0, Total=7482 [2022-11-02 20:10:10,980 INFO L87 Difference]: Start difference. First operand 449 states and 464 transitions. Second operand has 87 states, 87 states have (on average 5.839080459770115) internal successors, (508), 87 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:10:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:10:32,029 INFO L93 Difference]: Finished difference Result 1408 states and 1506 transitions. [2022-11-02 20:10:32,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2022-11-02 20:10:32,030 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 5.839080459770115) internal successors, (508), 87 states have internal predecessors, (508), 0 states have call successors, (0), 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 448 [2022-11-02 20:10:32,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:10:32,035 INFO L225 Difference]: With dead ends: 1408 [2022-11-02 20:10:32,036 INFO L226 Difference]: Without dead ends: 1408 [2022-11-02 20:10:32,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1211 GetRequests, 825 SyntacticMatches, 12 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57652 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=26001, Invalid=114999, Unknown=0, NotChecked=0, Total=141000 [2022-11-02 20:10:32,054 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4119 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 2736 mSolverCounterSat, 1653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4119 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 4389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1653 IncrementalHoareTripleChecker+Valid, 2736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:10:32,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4119 Valid, 263 Invalid, 4389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1653 Valid, 2736 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-02 20:10:32,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2022-11-02 20:10:32,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1384. [2022-11-02 20:10:32,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.0715835140997831) internal successors, (1482), 1383 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:10:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1482 transitions. [2022-11-02 20:10:32,085 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1482 transitions. Word has length 448 [2022-11-02 20:10:32,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:10:32,086 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 1482 transitions. [2022-11-02 20:10:32,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 5.839080459770115) internal successors, (508), 87 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:10:32,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1482 transitions. [2022-11-02 20:10:32,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1229 [2022-11-02 20:10:32,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:10:32,104 INFO L195 NwaCegarLoop]: trace histogram [219, 218, 218, 218, 218, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1] [2022-11-02 20:10:32,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-02 20:10:32,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-02 20:10:32,318 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:10:32,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:10:32,319 INFO L85 PathProgramCache]: Analyzing trace with hash -2000272005, now seen corresponding path program 12 times [2022-11-02 20:10:32,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:10:32,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958039592] [2022-11-02 20:10:32,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:10:32,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:10:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:10:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 124078 backedges. 63448 proven. 1001 refuted. 0 times theorem prover too weak. 59629 trivial. 0 not checked. [2022-11-02 20:10:37,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:10:37,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958039592] [2022-11-02 20:10:37,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958039592] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:10:37,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850447330] [2022-11-02 20:10:37,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:10:37,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:10:37,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:10:37,500 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:10:37,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-02 20:10:39,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-11-02 20:10:39,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:10:39,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1457 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 20:10:39,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:10:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 124078 backedges. 34924 proven. 2265 refuted. 0 times theorem prover too weak. 86889 trivial. 0 not checked. [2022-11-02 20:10:40,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:10:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 124078 backedges. 34839 proven. 2350 refuted. 0 times theorem prover too weak. 86889 trivial. 0 not checked. [2022-11-02 20:10:42,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850447330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:10:42,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:10:42,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23, 23] total 72 [2022-11-02 20:10:42,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913893385] [2022-11-02 20:10:42,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:10:42,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-02 20:10:42,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:10:42,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-02 20:10:42,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=4157, Unknown=0, NotChecked=0, Total=5112 [2022-11-02 20:10:42,454 INFO L87 Difference]: Start difference. First operand 1384 states and 1482 transitions. Second operand has 72 states, 72 states have (on average 4.638888888888889) internal successors, (334), 72 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:11:00,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:11:00,422 INFO L93 Difference]: Finished difference Result 3029 states and 3235 transitions. [2022-11-02 20:11:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2022-11-02 20:11:00,423 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 4.638888888888889) internal successors, (334), 72 states have internal predecessors, (334), 0 states have call successors, (0), 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 1228 [2022-11-02 20:11:00,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:11:00,432 INFO L225 Difference]: With dead ends: 3029 [2022-11-02 20:11:00,433 INFO L226 Difference]: Without dead ends: 3029 [2022-11-02 20:11:00,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2705 GetRequests, 2413 SyntacticMatches, 0 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29457 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=14871, Invalid=71271, Unknown=0, NotChecked=0, Total=86142 [2022-11-02 20:11:00,440 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3804 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 2064 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3804 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 3061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 997 IncrementalHoareTripleChecker+Valid, 2064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:11:00,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3804 Valid, 259 Invalid, 3061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [997 Valid, 2064 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-02 20:11:00,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2022-11-02 20:11:00,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 1891. [2022-11-02 20:11:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1891 states, 1890 states have (on average 1.0682539682539682) internal successors, (2019), 1890 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:11:00,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 2019 transitions. [2022-11-02 20:11:00,490 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 2019 transitions. Word has length 1228 [2022-11-02 20:11:00,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:11:00,491 INFO L495 AbstractCegarLoop]: Abstraction has 1891 states and 2019 transitions. [2022-11-02 20:11:00,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 4.638888888888889) internal successors, (334), 72 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:11:00,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 2019 transitions. [2022-11-02 20:11:00,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1411 [2022-11-02 20:11:00,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:11:00,513 INFO L195 NwaCegarLoop]: trace histogram [254, 253, 253, 253, 253, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2022-11-02 20:11:00,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-02 20:11:00,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:11:00,739 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:11:00,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:11:00,739 INFO L85 PathProgramCache]: Analyzing trace with hash 594718143, now seen corresponding path program 13 times [2022-11-02 20:11:00,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:11:00,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471210853] [2022-11-02 20:11:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:11:00,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:11:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 166326 backedges. 86574 proven. 1298 refuted. 0 times theorem prover too weak. 78454 trivial. 0 not checked. [2022-11-02 20:11:07,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:11:07,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471210853] [2022-11-02 20:11:07,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471210853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:11:07,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496399312] [2022-11-02 20:11:07,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:11:07,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:11:07,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:11:07,307 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:11:07,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-02 20:11:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:08,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 4255 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:11:08,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:11:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 166326 backedges. 77320 proven. 19602 refuted. 0 times theorem prover too weak. 69404 trivial. 0 not checked. [2022-11-02 20:11:10,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:11:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 166326 backedges. 77320 proven. 19602 refuted. 0 times theorem prover too weak. 69404 trivial. 0 not checked. [2022-11-02 20:11:11,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496399312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:11:11,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:11:11,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28, 28] total 70 [2022-11-02 20:11:11,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635772667] [2022-11-02 20:11:11,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:11:11,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-02 20:11:11,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:11:11,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-02 20:11:11,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=4065, Unknown=0, NotChecked=0, Total=4830 [2022-11-02 20:11:11,680 INFO L87 Difference]: Start difference. First operand 1891 states and 2019 transitions. Second operand has 70 states, 70 states have (on average 6.1) internal successors, (427), 70 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:11:17,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:11:17,344 INFO L93 Difference]: Finished difference Result 1965 states and 2092 transitions. [2022-11-02 20:11:17,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-11-02 20:11:17,345 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.1) internal successors, (427), 70 states have internal predecessors, (427), 0 states have call successors, (0), 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 1410 [2022-11-02 20:11:17,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:11:17,352 INFO L225 Difference]: With dead ends: 1965 [2022-11-02 20:11:17,353 INFO L226 Difference]: Without dead ends: 1965 [2022-11-02 20:11:17,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2966 GetRequests, 2771 SyntacticMatches, 12 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10753 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5823, Invalid=28217, Unknown=0, NotChecked=0, Total=34040 [2022-11-02 20:11:17,357 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1871 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 2116 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1871 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:11:17,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1871 Valid, 237 Invalid, 2554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2116 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-02 20:11:17,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2022-11-02 20:11:17,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1953. [2022-11-02 20:11:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 1.0655737704918034) internal successors, (2080), 1952 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:11:17,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2080 transitions. [2022-11-02 20:11:17,398 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2080 transitions. Word has length 1410 [2022-11-02 20:11:17,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:11:17,399 INFO L495 AbstractCegarLoop]: Abstraction has 1953 states and 2080 transitions. [2022-11-02 20:11:17,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 6.1) internal successors, (427), 70 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:11:17,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2080 transitions. [2022-11-02 20:11:17,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1483 [2022-11-02 20:11:17,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:11:17,422 INFO L195 NwaCegarLoop]: trace histogram [267, 266, 266, 266, 266, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-11-02 20:11:17,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-02 20:11:17,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:11:17,638 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:11:17,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:11:17,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1654195611, now seen corresponding path program 14 times [2022-11-02 20:11:17,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:11:17,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492002312] [2022-11-02 20:11:17,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:11:17,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:11:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 183855 backedges. 102036 proven. 2964 refuted. 0 times theorem prover too weak. 78855 trivial. 0 not checked. [2022-11-02 20:11:24,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:11:24,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492002312] [2022-11-02 20:11:24,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492002312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:11:24,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452184272] [2022-11-02 20:11:24,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:11:24,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:11:24,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:11:24,213 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:11:24,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-02 20:11:25,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:11:25,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:11:25,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 4470 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 20:11:25,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:11:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 183855 backedges. 88629 proven. 26239 refuted. 0 times theorem prover too weak. 68987 trivial. 0 not checked. [2022-11-02 20:11:27,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:11:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 183855 backedges. 88629 proven. 26239 refuted. 0 times theorem prover too weak. 68987 trivial. 0 not checked. [2022-11-02 20:11:29,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452184272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:11:29,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:11:29,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30, 30] total 74 [2022-11-02 20:11:29,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724963592] [2022-11-02 20:11:29,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:11:29,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-02 20:11:29,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:11:29,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-02 20:11:29,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=859, Invalid=4543, Unknown=0, NotChecked=0, Total=5402 [2022-11-02 20:11:29,309 INFO L87 Difference]: Start difference. First operand 1953 states and 2080 transitions. Second operand has 74 states, 74 states have (on average 6.175675675675675) internal successors, (457), 74 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:11:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:11:35,827 INFO L93 Difference]: Finished difference Result 2048 states and 2177 transitions. [2022-11-02 20:11:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-11-02 20:11:35,828 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 6.175675675675675) internal successors, (457), 74 states have internal predecessors, (457), 0 states have call successors, (0), 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 1482 [2022-11-02 20:11:35,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:11:35,836 INFO L225 Difference]: With dead ends: 2048 [2022-11-02 20:11:35,836 INFO L226 Difference]: Without dead ends: 2048 [2022-11-02 20:11:35,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3130 GetRequests, 2913 SyntacticMatches, 13 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13868 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=6833, Invalid=35397, Unknown=0, NotChecked=0, Total=42230 [2022-11-02 20:11:35,843 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1964 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 2251 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1964 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 2251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:11:35,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1964 Valid, 202 Invalid, 2887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 2251 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-02 20:11:35,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2022-11-02 20:11:35,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 2030. [2022-11-02 20:11:35,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 1.0640709709216363) internal successors, (2159), 2029 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:11:35,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 2159 transitions. [2022-11-02 20:11:35,882 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 2159 transitions. Word has length 1482 [2022-11-02 20:11:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:11:35,884 INFO L495 AbstractCegarLoop]: Abstraction has 2030 states and 2159 transitions. [2022-11-02 20:11:35,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 6.175675675675675) internal successors, (457), 74 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:11:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 2159 transitions. [2022-11-02 20:11:35,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1555 [2022-11-02 20:11:35,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:11:35,909 INFO L195 NwaCegarLoop]: trace histogram [280, 279, 279, 279, 279, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1] [2022-11-02 20:11:35,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-02 20:11:36,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-02 20:11:36,123 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:11:36,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:11:36,123 INFO L85 PathProgramCache]: Analyzing trace with hash 91939191, now seen corresponding path program 15 times [2022-11-02 20:11:36,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:11:36,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427003473] [2022-11-02 20:11:36,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:11:36,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:11:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:11:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 202262 backedges. 108381 proven. 2852 refuted. 0 times theorem prover too weak. 91029 trivial. 0 not checked. [2022-11-02 20:11:43,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:11:43,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427003473] [2022-11-02 20:11:43,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427003473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:11:43,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123125845] [2022-11-02 20:11:43,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:11:43,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:11:43,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:11:43,038 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:11:43,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-02 20:11:44,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-02 20:11:44,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:11:44,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 20:11:44,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:11:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 202262 backedges. 29290 proven. 1199 refuted. 0 times theorem prover too weak. 171773 trivial. 0 not checked. [2022-11-02 20:11:45,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:11:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 202262 backedges. 29290 proven. 1199 refuted. 0 times theorem prover too weak. 171773 trivial. 0 not checked. [2022-11-02 20:11:46,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123125845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:11:46,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:11:46,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 25, 25] total 68 [2022-11-02 20:11:46,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890324925] [2022-11-02 20:11:46,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:11:46,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-02 20:11:46,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:11:46,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-02 20:11:46,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=849, Invalid=3707, Unknown=0, NotChecked=0, Total=4556 [2022-11-02 20:11:46,455 INFO L87 Difference]: Start difference. First operand 2030 states and 2159 transitions. Second operand has 68 states, 68 states have (on average 4.970588235294118) internal successors, (338), 68 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:11:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:11:54,109 INFO L93 Difference]: Finished difference Result 2506 states and 2629 transitions. [2022-11-02 20:11:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-11-02 20:11:54,110 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.970588235294118) internal successors, (338), 68 states have internal predecessors, (338), 0 states have call successors, (0), 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 1554 [2022-11-02 20:11:54,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:11:54,119 INFO L225 Difference]: With dead ends: 2506 [2022-11-02 20:11:54,119 INFO L226 Difference]: Without dead ends: 2506 [2022-11-02 20:11:54,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3259 GetRequests, 3061 SyntacticMatches, 13 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10328 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=6644, Invalid=28138, Unknown=0, NotChecked=0, Total=34782 [2022-11-02 20:11:54,125 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1742 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 2849 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1742 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 3196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 2849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:11:54,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1742 Valid, 400 Invalid, 3196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 2849 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-02 20:11:54,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2022-11-02 20:11:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2031. [2022-11-02 20:11:54,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 1.0453201970443349) internal successors, (2122), 2030 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:11:54,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2122 transitions. [2022-11-02 20:11:54,168 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2122 transitions. Word has length 1554 [2022-11-02 20:11:54,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:11:54,169 INFO L495 AbstractCegarLoop]: Abstraction has 2031 states and 2122 transitions. [2022-11-02 20:11:54,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.970588235294118) internal successors, (338), 68 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:11:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2122 transitions. [2022-11-02 20:11:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1610 [2022-11-02 20:11:54,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:11:54,195 INFO L195 NwaCegarLoop]: trace histogram [291, 290, 290, 290, 290, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1] [2022-11-02 20:11:54,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-02 20:11:54,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-02 20:11:54,419 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-02 20:11:54,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:11:54,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1123683568, now seen corresponding path program 16 times [2022-11-02 20:11:54,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:11:54,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984570410] [2022-11-02 20:11:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:11:54,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:11:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 218146 backedges. 125582 proven. 1823 refuted. 0 times theorem prover too weak. 90741 trivial. 0 not checked. [2022-11-02 20:12:00,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:00,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984570410] [2022-11-02 20:12:00,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984570410] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:00,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889609137] [2022-11-02 20:12:00,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:12:00,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:00,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:00,599 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:00,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5225f8bc-183b-49a8-8022-cdafd95d68ff/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process