./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 753b20bc59ec3e8b11fc0f1b54dadf2ece41f6cecc7eda05bde7d4413de53136 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:15:26,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:15:26,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:15:26,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:15:26,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:15:26,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:15:26,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:15:26,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:15:26,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:15:26,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:15:26,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:15:26,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:15:26,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:15:26,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:15:26,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:15:26,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:15:26,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:15:26,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:15:26,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:15:26,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:15:26,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:15:26,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:15:26,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:15:26,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:15:26,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:15:26,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:15:26,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:15:26,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:15:26,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:15:26,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:15:26,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:15:26,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:15:26,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:15:26,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:15:26,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:15:26,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:15:26,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:15:26,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:15:26,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:15:26,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:15:26,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:15:26,605 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:15:26,642 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:15:26,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:15:26,642 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:15:26,643 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:15:26,643 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:15:26,644 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:15:26,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:15:26,644 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:15:26,645 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:15:26,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:15:26,645 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:15:26,645 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:15:26,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:15:26,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:15:26,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:15:26,646 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:15:26,646 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:15:26,646 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:15:26,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:15:26,647 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:15:26,652 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:15:26,653 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:15:26,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:15:26,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:15:26,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:15:26,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:15:26,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:15:26,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:15:26,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:15:26,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:15:26,678 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:15:26,678 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:15:26,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:15:26,679 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 753b20bc59ec3e8b11fc0f1b54dadf2ece41f6cecc7eda05bde7d4413de53136 [2022-11-25 17:15:26,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:15:26,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:15:26,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:15:26,972 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:15:26,972 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:15:26,974 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i [2022-11-25 17:15:30,037 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:15:30,298 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:15:30,299 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i [2022-11-25 17:15:30,312 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/data/3c9f8d779/132bcbaa63934391b50f4db589f3e92c/FLAGda87023be [2022-11-25 17:15:30,335 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/data/3c9f8d779/132bcbaa63934391b50f4db589f3e92c [2022-11-25 17:15:30,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:15:30,340 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:15:30,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:15:30,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:15:30,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:15:30,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:15:30" (1/1) ... [2022-11-25 17:15:30,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29786716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:30, skipping insertion in model container [2022-11-25 17:15:30,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:15:30" (1/1) ... [2022-11-25 17:15:30,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:15:30,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:15:30,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:15:30,783 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:15:30,834 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:15:30,860 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:15:30,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:30 WrapperNode [2022-11-25 17:15:30,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:15:30,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:15:30,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:15:30,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:15:30,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:30" (1/1) ... [2022-11-25 17:15:30,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:30" (1/1) ... [2022-11-25 17:15:30,955 INFO L138 Inliner]: procedures = 125, calls = 94, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 304 [2022-11-25 17:15:30,964 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:15:30,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:15:30,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:15:30,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:15:30,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:30" (1/1) ... [2022-11-25 17:15:30,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:30" (1/1) ... [2022-11-25 17:15:30,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:30" (1/1) ... [2022-11-25 17:15:30,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:30" (1/1) ... [2022-11-25 17:15:31,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:30" (1/1) ... [2022-11-25 17:15:31,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:30" (1/1) ... [2022-11-25 17:15:31,010 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:30" (1/1) ... [2022-11-25 17:15:31,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:30" (1/1) ... [2022-11-25 17:15:31,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:15:31,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:15:31,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:15:31,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:15:31,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:30" (1/1) ... [2022-11-25 17:15:31,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:15:31,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:31,077 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:15:31,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:15:31,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:15:31,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:15:31,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:15:31,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:15:31,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 17:15:31,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 17:15:31,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:15:31,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:15:31,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:15:31,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:15:31,121 INFO L130 BoogieDeclarations]: Found specification of procedure append [2022-11-25 17:15:31,121 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2022-11-25 17:15:31,278 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:15:31,301 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:15:32,174 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:15:32,184 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:15:32,184 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-25 17:15:32,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:15:32 BoogieIcfgContainer [2022-11-25 17:15:32,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:15:32,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:15:32,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:15:32,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:15:32,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:15:30" (1/3) ... [2022-11-25 17:15:32,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e34a92f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:15:32, skipping insertion in model container [2022-11-25 17:15:32,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:30" (2/3) ... [2022-11-25 17:15:32,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e34a92f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:15:32, skipping insertion in model container [2022-11-25 17:15:32,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:15:32" (3/3) ... [2022-11-25 17:15:32,197 INFO L112 eAbstractionObserver]: Analyzing ICFG split_list_test05-1.i [2022-11-25 17:15:32,213 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:15:32,213 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2022-11-25 17:15:32,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:15:32,272 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6581c1a9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:15:32,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2022-11-25 17:15:32,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 323 states, 160 states have (on average 2.1375) internal successors, (342), 309 states have internal predecessors, (342), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 17:15:32,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 17:15:32,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:32,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 17:15:32,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-25 17:15:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:32,290 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2022-11-25 17:15:32,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:32,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832945139] [2022-11-25 17:15:32,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:32,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:32,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:32,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832945139] [2022-11-25 17:15:32,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832945139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:32,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:32,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:15:32,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949087456] [2022-11-25 17:15:32,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:32,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:15:32,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:32,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:15:32,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:15:32,578 INFO L87 Difference]: Start difference. First operand has 323 states, 160 states have (on average 2.1375) internal successors, (342), 309 states have internal predecessors, (342), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:33,254 INFO L93 Difference]: Finished difference Result 548 states and 601 transitions. [2022-11-25 17:15:33,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:15:33,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-25 17:15:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:33,279 INFO L225 Difference]: With dead ends: 548 [2022-11-25 17:15:33,280 INFO L226 Difference]: Without dead ends: 546 [2022-11-25 17:15:33,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:15:33,288 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 246 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:33,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 436 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:15:33,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-11-25 17:15:33,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 407. [2022-11-25 17:15:33,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 247 states have (on average 2.0890688259109313) internal successors, (516), 393 states have internal predecessors, (516), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 17:15:33,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 544 transitions. [2022-11-25 17:15:33,397 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 544 transitions. Word has length 3 [2022-11-25 17:15:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:33,398 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 544 transitions. [2022-11-25 17:15:33,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:33,399 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 544 transitions. [2022-11-25 17:15:33,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 17:15:33,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:33,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 17:15:33,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:15:33,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-25 17:15:33,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:33,402 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2022-11-25 17:15:33,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:33,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306815276] [2022-11-25 17:15:33,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:33,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:33,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:33,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306815276] [2022-11-25 17:15:33,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306815276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:33,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:33,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:15:33,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680168458] [2022-11-25 17:15:33,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:33,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:15:33,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:33,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:15:33,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:15:33,548 INFO L87 Difference]: Start difference. First operand 407 states and 544 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:33,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:33,806 INFO L93 Difference]: Finished difference Result 408 states and 547 transitions. [2022-11-25 17:15:33,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:15:33,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-25 17:15:33,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:33,809 INFO L225 Difference]: With dead ends: 408 [2022-11-25 17:15:33,809 INFO L226 Difference]: Without dead ends: 408 [2022-11-25 17:15:33,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:15:33,811 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 6 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:33,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 554 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:15:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-25 17:15:33,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 405. [2022-11-25 17:15:33,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 247 states have (on average 2.080971659919028) internal successors, (514), 391 states have internal predecessors, (514), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 17:15:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 542 transitions. [2022-11-25 17:15:33,828 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 542 transitions. Word has length 3 [2022-11-25 17:15:33,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:33,828 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 542 transitions. [2022-11-25 17:15:33,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:33,828 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 542 transitions. [2022-11-25 17:15:33,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 17:15:33,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:33,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:33,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:15:33,830 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-25 17:15:33,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:33,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1117390162, now seen corresponding path program 1 times [2022-11-25 17:15:33,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:33,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890517529] [2022-11-25 17:15:33,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:33,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:33,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:33,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890517529] [2022-11-25 17:15:33,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890517529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:33,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:33,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:15:33,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617146242] [2022-11-25 17:15:33,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:33,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:15:33,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:33,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:15:33,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:15:33,985 INFO L87 Difference]: Start difference. First operand 405 states and 542 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:34,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:34,228 INFO L93 Difference]: Finished difference Result 400 states and 537 transitions. [2022-11-25 17:15:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:15:34,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 17:15:34,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:34,231 INFO L225 Difference]: With dead ends: 400 [2022-11-25 17:15:34,231 INFO L226 Difference]: Without dead ends: 400 [2022-11-25 17:15:34,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:15:34,240 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 43 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:34,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 497 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:15:34,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-25 17:15:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2022-11-25 17:15:34,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 247 states have (on average 2.0607287449392713) internal successors, (509), 386 states have internal predecessors, (509), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 17:15:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 537 transitions. [2022-11-25 17:15:34,269 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 537 transitions. Word has length 10 [2022-11-25 17:15:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:34,269 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 537 transitions. [2022-11-25 17:15:34,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:34,270 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 537 transitions. [2022-11-25 17:15:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 17:15:34,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:34,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:34,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:15:34,271 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-25 17:15:34,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:34,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1117390163, now seen corresponding path program 1 times [2022-11-25 17:15:34,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:34,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65397708] [2022-11-25 17:15:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:34,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:34,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:34,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65397708] [2022-11-25 17:15:34,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65397708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:34,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:34,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:15:34,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540224560] [2022-11-25 17:15:34,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:34,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:15:34,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:34,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:15:34,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:15:34,420 INFO L87 Difference]: Start difference. First operand 400 states and 537 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:34,634 INFO L93 Difference]: Finished difference Result 395 states and 532 transitions. [2022-11-25 17:15:34,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:15:34,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 17:15:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:34,636 INFO L225 Difference]: With dead ends: 395 [2022-11-25 17:15:34,636 INFO L226 Difference]: Without dead ends: 395 [2022-11-25 17:15:34,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:15:34,647 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 38 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:34,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 510 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:15:34,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-11-25 17:15:34,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2022-11-25 17:15:34,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 247 states have (on average 2.0404858299595143) internal successors, (504), 381 states have internal predecessors, (504), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 17:15:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 532 transitions. [2022-11-25 17:15:34,662 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 532 transitions. Word has length 10 [2022-11-25 17:15:34,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:34,662 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 532 transitions. [2022-11-25 17:15:34,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 532 transitions. [2022-11-25 17:15:34,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 17:15:34,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:34,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:34,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:15:34,665 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-25 17:15:34,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:34,666 INFO L85 PathProgramCache]: Analyzing trace with hash 279357079, now seen corresponding path program 1 times [2022-11-25 17:15:34,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:34,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858042026] [2022-11-25 17:15:34,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:34,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:34,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:34,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858042026] [2022-11-25 17:15:34,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858042026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:34,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:34,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:15:34,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414482593] [2022-11-25 17:15:34,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:34,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:15:34,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:34,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:15:34,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:15:34,898 INFO L87 Difference]: Start difference. First operand 395 states and 532 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:35,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:35,541 INFO L93 Difference]: Finished difference Result 523 states and 574 transitions. [2022-11-25 17:15:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:15:35,541 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 17:15:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:35,543 INFO L225 Difference]: With dead ends: 523 [2022-11-25 17:15:35,544 INFO L226 Difference]: Without dead ends: 523 [2022-11-25 17:15:35,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:15:35,545 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 317 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:35,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 806 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:15:35,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-11-25 17:15:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 387. [2022-11-25 17:15:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 247 states have (on average 2.0080971659919027) internal successors, (496), 373 states have internal predecessors, (496), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 17:15:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 524 transitions. [2022-11-25 17:15:35,573 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 524 transitions. Word has length 11 [2022-11-25 17:15:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:35,573 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 524 transitions. [2022-11-25 17:15:35,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 524 transitions. [2022-11-25 17:15:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 17:15:35,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:35,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:35,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:15:35,574 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-25 17:15:35,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:35,575 INFO L85 PathProgramCache]: Analyzing trace with hash 279357080, now seen corresponding path program 1 times [2022-11-25 17:15:35,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:35,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726384170] [2022-11-25 17:15:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:35,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:35,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:35,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726384170] [2022-11-25 17:15:35,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726384170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:35,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:35,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:15:35,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906697884] [2022-11-25 17:15:35,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:35,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:15:35,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:35,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:15:35,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:15:35,740 INFO L87 Difference]: Start difference. First operand 387 states and 524 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:36,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:36,515 INFO L93 Difference]: Finished difference Result 513 states and 564 transitions. [2022-11-25 17:15:36,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:15:36,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 17:15:36,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:36,518 INFO L225 Difference]: With dead ends: 513 [2022-11-25 17:15:36,518 INFO L226 Difference]: Without dead ends: 513 [2022-11-25 17:15:36,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:15:36,519 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 805 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:36,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [805 Valid, 447 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:15:36,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-11-25 17:15:36,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 378. [2022-11-25 17:15:36,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 247 states have (on average 1.9676113360323886) internal successors, (486), 364 states have internal predecessors, (486), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 17:15:36,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 514 transitions. [2022-11-25 17:15:36,530 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 514 transitions. Word has length 11 [2022-11-25 17:15:36,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:36,530 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 514 transitions. [2022-11-25 17:15:36,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:36,530 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 514 transitions. [2022-11-25 17:15:36,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 17:15:36,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:36,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:36,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:15:36,531 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-25 17:15:36,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:36,532 INFO L85 PathProgramCache]: Analyzing trace with hash 693745101, now seen corresponding path program 1 times [2022-11-25 17:15:36,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:36,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304183226] [2022-11-25 17:15:36,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:36,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:36,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:36,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304183226] [2022-11-25 17:15:36,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304183226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:36,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:36,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:15:36,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155870576] [2022-11-25 17:15:36,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:36,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:15:36,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:36,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:15:36,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:15:36,915 INFO L87 Difference]: Start difference. First operand 378 states and 514 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:37,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:37,394 INFO L93 Difference]: Finished difference Result 398 states and 537 transitions. [2022-11-25 17:15:37,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:15:37,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-25 17:15:37,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:37,397 INFO L225 Difference]: With dead ends: 398 [2022-11-25 17:15:37,397 INFO L226 Difference]: Without dead ends: 398 [2022-11-25 17:15:37,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:15:37,398 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 32 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:37,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1568 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:15:37,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-11-25 17:15:37,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 386. [2022-11-25 17:15:37,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 254 states have (on average 1.9448818897637796) internal successors, (494), 371 states have internal predecessors, (494), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 17:15:37,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 524 transitions. [2022-11-25 17:15:37,407 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 524 transitions. Word has length 20 [2022-11-25 17:15:37,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:37,408 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 524 transitions. [2022-11-25 17:15:37,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:37,408 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 524 transitions. [2022-11-25 17:15:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 17:15:37,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:37,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:37,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:15:37,409 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-25 17:15:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:37,410 INFO L85 PathProgramCache]: Analyzing trace with hash -964577360, now seen corresponding path program 1 times [2022-11-25 17:15:37,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:37,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967575303] [2022-11-25 17:15:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:37,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:37,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:37,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967575303] [2022-11-25 17:15:37,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967575303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:37,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:37,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 17:15:37,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154192227] [2022-11-25 17:15:37,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:37,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:15:37,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:37,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:15:37,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:15:37,946 INFO L87 Difference]: Start difference. First operand 386 states and 524 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:38,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:38,877 INFO L93 Difference]: Finished difference Result 526 states and 579 transitions. [2022-11-25 17:15:38,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:15:38,877 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-25 17:15:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:38,878 INFO L225 Difference]: With dead ends: 526 [2022-11-25 17:15:38,878 INFO L226 Difference]: Without dead ends: 526 [2022-11-25 17:15:38,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:15:38,879 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 755 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:38,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [769 Valid, 1277 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 17:15:38,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-11-25 17:15:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 389. [2022-11-25 17:15:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 257 states have (on average 1.933852140077821) internal successors, (497), 374 states have internal predecessors, (497), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 17:15:38,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 527 transitions. [2022-11-25 17:15:38,890 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 527 transitions. Word has length 22 [2022-11-25 17:15:38,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:38,890 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 527 transitions. [2022-11-25 17:15:38,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:15:38,890 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 527 transitions. [2022-11-25 17:15:38,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 17:15:38,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:38,892 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:38,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:15:38,892 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-25 17:15:38,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:38,893 INFO L85 PathProgramCache]: Analyzing trace with hash -339455757, now seen corresponding path program 1 times [2022-11-25 17:15:38,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:38,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439564811] [2022-11-25 17:15:38,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:38,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:39,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 17:15:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:40,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:40,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439564811] [2022-11-25 17:15:40,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439564811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:40,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744531941] [2022-11-25 17:15:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:40,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:40,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:40,255 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:40,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:15:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:40,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 17:15:40,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:40,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:15:40,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:15:41,011 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:15:41,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-25 17:15:41,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 17:15:41,150 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:15:41,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 37 [2022-11-25 17:15:41,188 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 17:15:41,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:15:41,382 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-25 17:15:41,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-25 17:15:41,635 INFO L321 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2022-11-25 17:15:41,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2022-11-25 17:15:41,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-11-25 17:15:41,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-11-25 17:15:41,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-11-25 17:15:42,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:15:42,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-11-25 17:15:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:42,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:42,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:42,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2022-11-25 17:15:42,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:42,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 214 [2022-11-25 17:15:42,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2022-11-25 17:15:42,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 158 [2022-11-25 17:15:42,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744531941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:42,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:15:42,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2022-11-25 17:15:42,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672825297] [2022-11-25 17:15:42,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:42,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:15:42,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:42,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:15:42,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=880, Unknown=12, NotChecked=0, Total=992 [2022-11-25 17:15:42,865 INFO L87 Difference]: Start difference. First operand 389 states and 527 transitions. Second operand has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 17:15:44,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:15:48,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:15:48,112 INFO L93 Difference]: Finished difference Result 529 states and 581 transitions. [2022-11-25 17:15:48,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:15:48,113 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-11-25 17:15:48,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:15:48,115 INFO L225 Difference]: With dead ends: 529 [2022-11-25 17:15:48,116 INFO L226 Difference]: Without dead ends: 529 [2022-11-25 17:15:48,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=262, Invalid=1448, Unknown=12, NotChecked=0, Total=1722 [2022-11-25 17:15:48,117 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 611 mSDsluCounter, 2267 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 2459 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:15:48,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 2459 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2394 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-25 17:15:48,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-11-25 17:15:48,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 394. [2022-11-25 17:15:48,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 262 states have (on average 1.9122137404580153) internal successors, (501), 379 states have internal predecessors, (501), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 17:15:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 531 transitions. [2022-11-25 17:15:48,129 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 531 transitions. Word has length 37 [2022-11-25 17:15:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:15:48,129 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 531 transitions. [2022-11-25 17:15:48,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 17:15:48,130 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 531 transitions. [2022-11-25 17:15:48,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 17:15:48,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:15:48,131 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:48,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:48,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 17:15:48,343 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-25 17:15:48,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:48,344 INFO L85 PathProgramCache]: Analyzing trace with hash -339455756, now seen corresponding path program 1 times [2022-11-25 17:15:48,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:48,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740308037] [2022-11-25 17:15:48,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:48,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:49,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 17:15:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:50,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:50,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740308037] [2022-11-25 17:15:50,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740308037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:50,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828174132] [2022-11-25 17:15:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:50,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:50,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:50,019 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:50,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:15:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:50,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-25 17:15:50,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:50,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:15:50,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:15:50,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:15:50,665 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:15:50,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-25 17:15:50,687 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:15:50,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-25 17:15:50,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 17:15:50,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 17:15:50,864 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:15:50,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 46 [2022-11-25 17:15:50,888 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:15:50,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 44 [2022-11-25 17:15:50,928 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 17:15:50,974 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 17:15:51,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:15:51,198 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-25 17:15:51,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-25 17:15:51,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:15:51,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 17:15:51,491 INFO L321 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2022-11-25 17:15:51,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2022-11-25 17:15:51,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-11-25 17:15:51,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 17:15:51,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-11-25 17:15:51,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 17:15:51,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-11-25 17:15:51,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 17:15:51,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:15:51,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-11-25 17:15:51,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:15:51,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-11-25 17:15:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:52,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:52,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:52,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 103 [2022-11-25 17:15:52,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:52,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 113 [2022-11-25 17:15:52,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:52,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 275 treesize of output 205 [2022-11-25 17:15:52,918 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:52,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1060 treesize of output 996 [2022-11-25 17:15:53,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:53,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1656 treesize of output 1566 [2022-11-25 17:15:53,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1528 treesize of output 1388 [2022-11-25 17:15:53,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1359 treesize of output 1231 [2022-11-25 17:15:53,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1231 treesize of output 1159 [2022-11-25 17:15:53,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1196 treesize of output 1120 [2022-11-25 17:15:53,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1095 treesize of output 1079 [2022-11-25 17:16:02,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828174132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:02,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:16:02,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2022-11-25 17:16:02,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15499237] [2022-11-25 17:16:02,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:02,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:16:02,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:02,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:16:02,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=946, Unknown=13, NotChecked=0, Total=1056 [2022-11-25 17:16:02,648 INFO L87 Difference]: Start difference. First operand 394 states and 531 transitions. Second operand has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 23 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:16:08,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:08,596 INFO L93 Difference]: Finished difference Result 528 states and 580 transitions. [2022-11-25 17:16:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:16:08,597 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 23 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-11-25 17:16:08,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:08,600 INFO L225 Difference]: With dead ends: 528 [2022-11-25 17:16:08,600 INFO L226 Difference]: Without dead ends: 528 [2022-11-25 17:16:08,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=231, Invalid=1562, Unknown=13, NotChecked=0, Total=1806 [2022-11-25 17:16:08,602 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 855 mSDsluCounter, 2300 mSDsCounter, 0 mSdLazyCounter, 4027 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 2444 SdHoareTripleChecker+Invalid, 4145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 4027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:08,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 2444 Invalid, 4145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 4027 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-25 17:16:08,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-11-25 17:16:08,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 393. [2022-11-25 17:16:08,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 262 states have (on average 1.9083969465648856) internal successors, (500), 378 states have internal predecessors, (500), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 17:16:08,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 530 transitions. [2022-11-25 17:16:08,615 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 530 transitions. Word has length 37 [2022-11-25 17:16:08,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:08,616 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 530 transitions. [2022-11-25 17:16:08,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 23 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:16:08,616 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 530 transitions. [2022-11-25 17:16:08,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-25 17:16:08,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:08,624 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:08,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:08,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:08,830 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-25 17:16:08,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:08,831 INFO L85 PathProgramCache]: Analyzing trace with hash 2080045512, now seen corresponding path program 1 times [2022-11-25 17:16:08,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:08,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895097039] [2022-11-25 17:16:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:08,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 17:16:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:16:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-25 17:16:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-25 17:16:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-25 17:16:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-25 17:16:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-25 17:16:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-11-25 17:16:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-25 17:16:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-25 17:16:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-11-25 17:16:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-11-25 17:16:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-11-25 17:16:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-11-25 17:16:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-11-25 17:16:09,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:09,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895097039] [2022-11-25 17:16:09,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895097039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:09,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605314442] [2022-11-25 17:16:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:09,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:09,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:09,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:09,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:16:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:09,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:16:09,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 869 trivial. 0 not checked. [2022-11-25 17:16:09,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:16:09,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605314442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:09,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:16:09,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-25 17:16:09,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455187431] [2022-11-25 17:16:09,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:09,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:16:09,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:09,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:16:09,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:16:09,851 INFO L87 Difference]: Start difference. First operand 393 states and 530 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 17:16:09,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:09,866 INFO L93 Difference]: Finished difference Result 394 states and 531 transitions. [2022-11-25 17:16:09,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:16:09,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 204 [2022-11-25 17:16:09,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:09,870 INFO L225 Difference]: With dead ends: 394 [2022-11-25 17:16:09,870 INFO L226 Difference]: Without dead ends: 394 [2022-11-25 17:16:09,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:16:09,871 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 0 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:09,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 641 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:16:09,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-11-25 17:16:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2022-11-25 17:16:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 263 states have (on average 1.9049429657794676) internal successors, (501), 379 states have internal predecessors, (501), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 17:16:09,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 531 transitions. [2022-11-25 17:16:09,883 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 531 transitions. Word has length 204 [2022-11-25 17:16:09,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:09,883 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 531 transitions. [2022-11-25 17:16:09,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 17:16:09,883 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 531 transitions. [2022-11-25 17:16:09,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-25 17:16:09,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:09,893 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:09,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:10,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:10,101 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-25 17:16:10,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:10,102 INFO L85 PathProgramCache]: Analyzing trace with hash 729443525, now seen corresponding path program 1 times [2022-11-25 17:16:10,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:10,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604966688] [2022-11-25 17:16:10,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:10,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:11,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 17:16:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:11,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:16:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:11,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 17:16:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:11,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-25 17:16:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:11,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-25 17:16:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:11,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-25 17:16:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:11,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-25 17:16:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:11,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-25 17:16:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:11,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-25 17:16:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:11,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-25 17:16:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:11,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-11-25 17:16:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:11,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-11-25 17:16:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:11,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-11-25 17:16:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:11,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-11-25 17:16:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1274 backedges. 314 proven. 11 refuted. 0 times theorem prover too weak. 949 trivial. 0 not checked. [2022-11-25 17:16:12,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:12,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604966688] [2022-11-25 17:16:12,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604966688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:12,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777972664] [2022-11-25 17:16:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:12,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:12,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:12,218 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:12,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:16:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:12,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 2014 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-25 17:16:12,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:13,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:16:13,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-25 17:16:13,272 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:16:13,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-11-25 17:16:13,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-25 17:16:13,387 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:16:13,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-11-25 17:16:13,488 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-25 17:16:13,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 17:16:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1274 backedges. 610 proven. 24 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2022-11-25 17:16:18,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:18,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777972664] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:18,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:16:18,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 31 [2022-11-25 17:16:18,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701505227] [2022-11-25 17:16:18,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:18,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 17:16:18,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:18,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 17:16:18,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=870, Unknown=18, NotChecked=0, Total=992 [2022-11-25 17:16:18,389 INFO L87 Difference]: Start difference. First operand 394 states and 531 transitions. Second operand has 31 states, 29 states have (on average 4.379310344827586) internal successors, (127), 26 states have internal predecessors, (127), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) [2022-11-25 17:16:20,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:16:22,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:16:37,289 WARN L233 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 39 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:16:39,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:16:53,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:16:55,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:04,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:06,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:31,023 WARN L233 SmtUtils]: Spent 20.46s on a formula simplification. DAG size of input: 52 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:17:39,206 WARN L233 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 46 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:17:41,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:43,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:45,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:48,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:04,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:07,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:09,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:11,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:13,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:14,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:16,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:26,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:28,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:30,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:32,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:34,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:36,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:38,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:40,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:43,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:45,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:47,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:48,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:50,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:53,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:55,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:57,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:19:01,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:19:01,147 INFO L93 Difference]: Finished difference Result 771 states and 883 transitions. [2022-11-25 17:19:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 17:19:01,148 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.379310344827586) internal successors, (127), 26 states have internal predecessors, (127), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) Word has length 230 [2022-11-25 17:19:01,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:19:01,153 INFO L225 Difference]: With dead ends: 771 [2022-11-25 17:19:01,153 INFO L226 Difference]: Without dead ends: 771 [2022-11-25 17:19:01,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 94.5s TimeCoverageRelationStatistics Valid=448, Invalid=2920, Unknown=54, NotChecked=0, Total=3422 [2022-11-25 17:19:01,155 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 2491 mSDsluCounter, 2766 mSDsCounter, 0 mSdLazyCounter, 3730 mSolverCounterSat, 257 mSolverCounterUnsat, 47 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2491 SdHoareTripleChecker+Valid, 2939 SdHoareTripleChecker+Invalid, 4034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 3730 IncrementalHoareTripleChecker+Invalid, 47 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:19:01,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2491 Valid, 2939 Invalid, 4034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 3730 Invalid, 47 Unknown, 0 Unchecked, 73.1s Time] [2022-11-25 17:19:01,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-11-25 17:19:01,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 431. [2022-11-25 17:19:01,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 290 states have (on average 1.8379310344827586) internal successors, (533), 404 states have internal predecessors, (533), 29 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (57), 28 states have call predecessors, (57), 29 states have call successors, (57) [2022-11-25 17:19:01,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 619 transitions. [2022-11-25 17:19:01,180 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 619 transitions. Word has length 230 [2022-11-25 17:19:01,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:19:01,181 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 619 transitions. [2022-11-25 17:19:01,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.379310344827586) internal successors, (127), 26 states have internal predecessors, (127), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) [2022-11-25 17:19:01,181 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 619 transitions. [2022-11-25 17:19:01,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-11-25 17:19:01,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:01,186 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:01,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:01,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:19:01,396 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-25 17:19:01,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:01,396 INFO L85 PathProgramCache]: Analyzing trace with hash -575518174, now seen corresponding path program 1 times [2022-11-25 17:19:01,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:01,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796043731] [2022-11-25 17:19:01,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:01,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:03,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 17:19:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:03,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:19:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:03,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 17:19:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:03,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-25 17:19:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:03,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 17:19:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:03,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-11-25 17:19:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:03,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-25 17:19:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:03,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-25 17:19:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:03,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-25 17:19:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:03,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-11-25 17:19:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:03,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-11-25 17:19:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:03,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-11-25 17:19:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:03,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-11-25 17:19:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:04,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-11-25 17:19:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 254 proven. 5 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2022-11-25 17:19:04,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:04,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796043731] [2022-11-25 17:19:04,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796043731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:04,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813906312] [2022-11-25 17:19:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:04,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:04,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:04,494 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:04,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:19:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:05,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 17:19:05,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:05,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:19:05,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:19:05,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-25 17:19:05,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-25 17:19:05,722 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:19:05,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:19:05,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 17:19:05,754 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:19:05,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:19:05,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 17:19:05,842 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:19:05,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-11-25 17:19:05,863 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:19:05,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-11-25 17:19:06,012 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-25 17:19:06,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 17:19:06,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-25 17:19:06,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-25 17:19:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 267 proven. 5 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2022-11-25 17:19:06,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:06,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:06,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 66 [2022-11-25 17:19:06,496 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:06,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 53 [2022-11-25 17:19:06,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 72 [2022-11-25 17:19:06,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 102 [2022-11-25 17:19:06,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 85 [2022-11-25 17:19:06,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 79 [2022-11-25 17:19:06,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:06,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 86 [2022-11-25 17:19:06,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:06,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2022-11-25 17:19:07,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:07,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2022-11-25 17:19:07,092 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:07,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-11-25 17:19:07,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 17:19:07,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:19:07,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:07,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-11-25 17:19:07,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:19:07,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-25 17:19:07,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:19:07,143 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-11-25 17:19:07,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 1 [2022-11-25 17:19:07,578 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 17:19:07,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-25 17:19:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 265 proven. 7 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2022-11-25 17:19:07,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813906312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:07,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:07,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 36 [2022-11-25 17:19:07,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824221669] [2022-11-25 17:19:07,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:07,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 17:19:07,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:07,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 17:19:07,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1212, Unknown=1, NotChecked=0, Total=1332 [2022-11-25 17:19:07,638 INFO L87 Difference]: Start difference. First operand 431 states and 619 transitions. Second operand has 37 states, 36 states have (on average 4.166666666666667) internal successors, (150), 34 states have internal predecessors, (150), 5 states have call successors, (42), 4 states have call predecessors, (42), 6 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) [2022-11-25 17:19:13,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:19:13,735 INFO L93 Difference]: Finished difference Result 981 states and 1107 transitions. [2022-11-25 17:19:13,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:19:13,736 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.166666666666667) internal successors, (150), 34 states have internal predecessors, (150), 5 states have call successors, (42), 4 states have call predecessors, (42), 6 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) Word has length 244 [2022-11-25 17:19:13,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:19:13,741 INFO L225 Difference]: With dead ends: 981 [2022-11-25 17:19:13,742 INFO L226 Difference]: Without dead ends: 981 [2022-11-25 17:19:13,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=433, Invalid=3106, Unknown=1, NotChecked=0, Total=3540 [2022-11-25 17:19:13,743 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 5294 mSDsluCounter, 1957 mSDsCounter, 0 mSdLazyCounter, 4571 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5294 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 4926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 4571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:19:13,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5294 Valid, 2078 Invalid, 4926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 4571 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-25 17:19:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-11-25 17:19:13,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 440. [2022-11-25 17:19:13,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 300 states have (on average 1.79) internal successors, (537), 413 states have internal predecessors, (537), 29 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (57), 28 states have call predecessors, (57), 29 states have call successors, (57) [2022-11-25 17:19:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 623 transitions. [2022-11-25 17:19:13,769 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 623 transitions. Word has length 244 [2022-11-25 17:19:13,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:19:13,770 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 623 transitions. [2022-11-25 17:19:13,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.166666666666667) internal successors, (150), 34 states have internal predecessors, (150), 5 states have call successors, (42), 4 states have call predecessors, (42), 6 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) [2022-11-25 17:19:13,771 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 623 transitions. [2022-11-25 17:19:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-11-25 17:19:13,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:13,775 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:13,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:13,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:19:13,985 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-25 17:19:13,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:13,985 INFO L85 PathProgramCache]: Analyzing trace with hash 247572815, now seen corresponding path program 1 times [2022-11-25 17:19:13,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:13,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994778101] [2022-11-25 17:19:13,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:13,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:14,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 17:19:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:14,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:19:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:14,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 17:19:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:14,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-25 17:19:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:14,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 17:19:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:14,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-11-25 17:19:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:14,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-25 17:19:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:14,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-25 17:19:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:14,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-25 17:19:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:14,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-11-25 17:19:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:14,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-11-25 17:19:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:14,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-11-25 17:19:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:14,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-11-25 17:19:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:14,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-11-25 17:19:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1022 trivial. 0 not checked. [2022-11-25 17:19:14,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:14,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994778101] [2022-11-25 17:19:14,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994778101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:14,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:14,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:19:14,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74304455] [2022-11-25 17:19:14,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:14,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:19:14,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:14,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:19:14,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:19:14,633 INFO L87 Difference]: Start difference. First operand 440 states and 623 transitions. Second operand has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-25 17:19:15,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:19:15,361 INFO L93 Difference]: Finished difference Result 641 states and 748 transitions. [2022-11-25 17:19:15,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:19:15,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 247 [2022-11-25 17:19:15,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:19:15,366 INFO L225 Difference]: With dead ends: 641 [2022-11-25 17:19:15,366 INFO L226 Difference]: Without dead ends: 641 [2022-11-25 17:19:15,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:19:15,367 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 631 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:19:15,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 672 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:19:15,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-11-25 17:19:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 435. [2022-11-25 17:19:15,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 300 states have (on average 1.7533333333333334) internal successors, (526), 408 states have internal predecessors, (526), 29 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (57), 28 states have call predecessors, (57), 29 states have call successors, (57) [2022-11-25 17:19:15,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 612 transitions. [2022-11-25 17:19:15,389 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 612 transitions. Word has length 247 [2022-11-25 17:19:15,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:19:15,390 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 612 transitions. [2022-11-25 17:19:15,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-25 17:19:15,391 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 612 transitions. [2022-11-25 17:19:15,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-11-25 17:19:15,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:15,396 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:15,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 17:19:15,396 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-25 17:19:15,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:15,396 INFO L85 PathProgramCache]: Analyzing trace with hash 247572816, now seen corresponding path program 1 times [2022-11-25 17:19:15,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:15,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867466624] [2022-11-25 17:19:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:15,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:18,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 17:19:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:18,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:19:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:18,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 17:19:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:18,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-25 17:19:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:18,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 17:19:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:18,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-11-25 17:19:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:18,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-25 17:19:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:18,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-25 17:19:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:18,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-25 17:19:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:19,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-11-25 17:19:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:19,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-11-25 17:19:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:20,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-11-25 17:19:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:20,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-11-25 17:19:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:20,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-11-25 17:19:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 358 proven. 118 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-11-25 17:19:20,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:20,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867466624] [2022-11-25 17:19:20,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867466624] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:20,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440850361] [2022-11-25 17:19:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:20,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:20,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:20,966 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:20,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:19:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:21,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 2097 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 17:19:21,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:22,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:19:22,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-25 17:19:22,293 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:19:22,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:19:22,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 17:19:22,373 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:19:22,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-11-25 17:19:22,463 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:19:22,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 17:19:22,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 17:19:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 267 proven. 5 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2022-11-25 17:19:22,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:22,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-25 17:19:22,945 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:22,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-11-25 17:19:22,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-11-25 17:19:22,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-25 17:19:23,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:23,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-11-25 17:19:23,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:23,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-25 17:19:23,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-25 17:19:23,705 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 17:19:23,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-25 17:19:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 265 proven. 7 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2022-11-25 17:19:23,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440850361] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:23,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:23,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 17, 15] total 56 [2022-11-25 17:19:23,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079514026] [2022-11-25 17:19:23,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:23,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-25 17:19:23,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:23,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-25 17:19:23,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2838, Unknown=5, NotChecked=0, Total=3080 [2022-11-25 17:19:23,761 INFO L87 Difference]: Start difference. First operand 435 states and 612 transitions. Second operand has 56 states, 53 states have (on average 3.509433962264151) internal successors, (186), 50 states have internal predecessors, (186), 8 states have call successors, (42), 4 states have call predecessors, (42), 8 states have return successors, (34), 10 states have call predecessors, (34), 8 states have call successors, (34) [2022-11-25 17:19:33,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:19:33,271 INFO L93 Difference]: Finished difference Result 664 states and 732 transitions. [2022-11-25 17:19:33,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 17:19:33,272 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 3.509433962264151) internal successors, (186), 50 states have internal predecessors, (186), 8 states have call successors, (42), 4 states have call predecessors, (42), 8 states have return successors, (34), 10 states have call predecessors, (34), 8 states have call successors, (34) Word has length 247 [2022-11-25 17:19:33,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:19:33,275 INFO L225 Difference]: With dead ends: 664 [2022-11-25 17:19:33,275 INFO L226 Difference]: Without dead ends: 645 [2022-11-25 17:19:33,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 495 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2482 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1174, Invalid=7377, Unknown=5, NotChecked=0, Total=8556 [2022-11-25 17:19:33,278 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 2958 mSDsluCounter, 2995 mSDsCounter, 0 mSdLazyCounter, 6121 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2958 SdHoareTripleChecker+Valid, 3123 SdHoareTripleChecker+Invalid, 6377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 6121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:19:33,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2958 Valid, 3123 Invalid, 6377 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [256 Valid, 6121 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-25 17:19:33,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-11-25 17:19:33,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 402. [2022-11-25 17:19:33,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 283 states have (on average 1.7632508833922262) internal successors, (499), 387 states have internal predecessors, (499), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 17:19:33,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 529 transitions. [2022-11-25 17:19:33,292 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 529 transitions. Word has length 247 [2022-11-25 17:19:33,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:19:33,293 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 529 transitions. [2022-11-25 17:19:33,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 3.509433962264151) internal successors, (186), 50 states have internal predecessors, (186), 8 states have call successors, (42), 4 states have call predecessors, (42), 8 states have return successors, (34), 10 states have call predecessors, (34), 8 states have call successors, (34) [2022-11-25 17:19:33,293 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 529 transitions. [2022-11-25 17:19:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-11-25 17:19:33,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:19:33,297 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:33,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:33,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:19:33,508 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-25 17:19:33,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:33,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2049588189, now seen corresponding path program 1 times [2022-11-25 17:19:33,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:33,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165334387] [2022-11-25 17:19:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:33,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:16,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 17:20:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:18,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:20:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:20,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 17:20:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:22,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-25 17:20:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:25,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-25 17:20:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:26,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-25 17:20:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:28,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-25 17:20:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:29,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-11-25 17:20:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:30,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-25 17:20:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:32,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-25 17:20:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:34,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-11-25 17:20:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:38,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-11-25 17:20:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:41,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-11-25 17:20:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:46,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2022-11-25 17:20:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:41,099 WARN L233 SmtUtils]: Spent 28.25s on a formula simplification that was a NOOP. DAG size: 308 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:22:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 65 proven. 870 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2022-11-25 17:22:02,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:02,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165334387] [2022-11-25 17:22:02,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165334387] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:02,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611071180] [2022-11-25 17:22:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:02,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:02,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:02,212 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:02,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3575c53a-315d-49ea-9417-f043525fcc84/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:22:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:03,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 2167 conjuncts, 715 conjunts are in the unsatisfiable core [2022-11-25 17:22:03,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:03,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:22:04,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:22:04,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:22:04,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:22:04,750 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:22:04,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:22:04,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 17:22:05,034 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:22:05,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-11-25 17:22:05,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-25 17:22:05,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-25 17:22:05,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:05,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 17:22:05,361 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:22:05,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-11-25 17:22:05,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-25 17:22:05,404 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:22:05,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-11-25 17:22:05,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-25 17:22:05,748 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:22:05,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-11-25 17:22:05,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 17:22:05,776 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:22:05,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-11-25 17:22:06,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:22:06,228 INFO L321 Elim1Store]: treesize reduction 18, result has 30.8 percent of original size [2022-11-25 17:22:06,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 17:22:10,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:10,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:10,298 INFO L321 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2022-11-25 17:22:10,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 231 treesize of output 257 [2022-11-25 17:22:10,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:10,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:10,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:10,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 31 [2022-11-25 17:22:10,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:10,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:10,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:10,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:10,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:10,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 49 [2022-11-25 17:22:10,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:10,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 122 [2022-11-25 17:22:10,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:10,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 29 [2022-11-25 17:22:10,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-25 17:22:10,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:10,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-25 17:22:10,438 INFO L321 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-11-25 17:22:10,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 17:22:10,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 35 [2022-11-25 17:22:14,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:14,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:14,708 INFO L321 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2022-11-25 17:22:14,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 230 [2022-11-25 17:22:14,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:14,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:14,751 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 17:22:14,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 41 [2022-11-25 17:22:14,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:14,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:14,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:14,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:14,789 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 17:22:14,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 59 [2022-11-25 17:22:14,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:14,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 155 [2022-11-25 17:22:14,865 INFO L321 Elim1Store]: treesize reduction 77, result has 30.6 percent of original size [2022-11-25 17:22:14,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 54 [2022-11-25 17:22:14,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:14,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-25 17:22:18,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:18,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:18,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:18,834 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-25 17:22:18,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 441 treesize of output 415 [2022-11-25 17:22:18,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:18,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:18,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:18,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:18,898 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 17:22:18,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 59 [2022-11-25 17:22:18,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:18,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:18,951 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 17:22:18,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 41 [2022-11-25 17:22:18,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:18,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 397 treesize of output 267 [2022-11-25 17:22:19,032 INFO L321 Elim1Store]: treesize reduction 77, result has 30.6 percent of original size [2022-11-25 17:22:19,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 54 [2022-11-25 17:22:19,121 INFO L321 Elim1Store]: treesize reduction 25, result has 35.9 percent of original size [2022-11-25 17:22:19,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 55 [2022-11-25 17:22:19,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:19,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-25 17:22:23,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:23,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:23,664 INFO L321 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2022-11-25 17:22:23,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 224 treesize of output 258 [2022-11-25 17:22:23,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:23,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:23,721 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 17:22:23,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 41 [2022-11-25 17:22:23,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:23,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:23,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:23,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:23,806 INFO L321 Elim1Store]: treesize reduction 38, result has 41.5 percent of original size [2022-11-25 17:22:23,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 174 [2022-11-25 17:22:23,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:23,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 344 treesize of output 240 [2022-11-25 17:22:23,898 INFO L321 Elim1Store]: treesize reduction 77, result has 30.6 percent of original size [2022-11-25 17:22:23,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 54 [2022-11-25 17:22:23,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 17:22:23,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:23,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 27 [2022-11-25 17:22:24,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 17:22:24,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:22:24,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 13 [2022-11-25 17:22:24,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 17:22:24,302 INFO L321 Elim1Store]: treesize reduction 25, result has 35.9 percent of original size [2022-11-25 17:22:24,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 57 [2022-11-25 17:22:28,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:28,273 INFO L321 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2022-11-25 17:22:28,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 474 treesize of output 480 [2022-11-25 17:22:28,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:28,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 492 treesize of output 364 [2022-11-25 17:22:28,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:28,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:28,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:28,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:28,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:28,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:28,694 INFO L321 Elim1Store]: treesize reduction 208, result has 24.9 percent of original size [2022-11-25 17:22:28,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 313 treesize of output 406 [2022-11-25 17:22:28,849 INFO L321 Elim1Store]: treesize reduction 77, result has 30.6 percent of original size [2022-11-25 17:22:28,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 54 [2022-11-25 17:22:28,943 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 17:22:28,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 47 [2022-11-25 17:22:29,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 17:22:30,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:30,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 335 treesize of output 296 [2022-11-25 17:22:30,413 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 17:22:30,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-11-25 17:22:30,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-25 17:22:30,592 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 17:22:30,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-11-25 17:22:30,669 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 17:22:30,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 75 [2022-11-25 17:22:31,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 775 treesize of output 583 [2022-11-25 17:22:48,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:22:48,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:23:07,107 WARN L233 SmtUtils]: Spent 18.14s on a formula simplification. DAG size of input: 281 DAG size of output: 165 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-25 17:23:07,108 INFO L321 Elim1Store]: treesize reduction 684, result has 32.9 percent of original size [2022-11-25 17:23:07,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 46 case distinctions, treesize of input 3879 treesize of output 3379 [2022-11-25 17:23:07,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:23:07,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:23:07,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:23:07,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:23:07,461 INFO L217 Elim1Store]: Index analysis took 154 ms [2022-11-25 17:23:47,482 WARN L233 SmtUtils]: Spent 40.01s on a formula simplification. DAG size of input: 964 DAG size of output: 588 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-25 17:23:47,484 INFO L321 Elim1Store]: treesize reduction 2348, result has 35.4 percent of original size [2022-11-25 17:23:47,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 18 select indices, 18 select index equivalence classes, 5 disjoint index pairs (out of 153 index pairs), introduced 20 new quantified variables, introduced 182 case distinctions, treesize of input 79109 treesize of output 75888 [2022-11-25 17:23:49,107 INFO L217 Elim1Store]: Index analysis took 558 ms [2022-11-25 17:23:49,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:23:51,623 INFO L321 Elim1Store]: treesize reduction 415, result has 26.4 percent of original size [2022-11-25 17:23:51,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 51 case distinctions, treesize of input 74546 treesize of output 74667 [2022-11-25 17:23:52,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:23:57,646 INFO L321 Elim1Store]: treesize reduction 1096, result has 7.0 percent of original size [2022-11-25 17:23:57,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 5 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 65 case distinctions, treesize of input 74525 treesize of output 66180 [2022-11-25 17:23:59,348 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:59,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74052 treesize of output 74053 [2022-11-25 17:24:00,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:24:00,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74044 treesize of output 72769 [2022-11-25 17:24:02,307 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 17:24:02,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 41 [2022-11-25 17:24:11,458 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 17:24:11,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 114