./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash cad2c6f6e8ebe2adcd550e4a56b83be37e52f812ae33bfb645236c6925734dbf --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:44:35,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:44:35,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:44:35,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:44:35,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:44:35,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:44:35,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:44:35,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:44:35,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:44:35,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:44:35,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:44:35,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:44:35,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:44:35,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:44:35,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:44:35,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:44:35,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:44:35,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:44:35,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:44:35,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:44:35,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:44:35,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:44:35,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:44:35,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:44:35,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:44:35,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:44:35,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:44:35,381 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:44:35,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:44:35,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:44:35,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:44:35,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:44:35,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:44:35,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:44:35,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:44:35,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:44:35,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:44:35,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:44:35,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:44:35,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:44:35,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:44:35,390 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-12-14 08:44:35,443 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:44:35,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:44:35,444 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:44:35,444 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:44:35,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:44:35,445 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:44:35,445 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:44:35,445 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:44:35,445 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:44:35,445 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:44:35,445 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:44:35,445 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:44:35,446 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:44:35,446 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:44:35,446 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:44:35,446 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:44:35,446 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:44:35,446 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:44:35,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 08:44:35,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 08:44:35,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:44:35,447 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 08:44:35,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:44:35,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:44:35,456 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 08:44:35,456 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 08:44:35,457 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 08:44:35,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:44:35,457 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 08:44:35,457 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:44:35,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:44:35,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:44:35,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:44:35,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:44:35,458 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:44:35,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:44:35,458 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:44:35,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:44:35,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:44:35,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cad2c6f6e8ebe2adcd550e4a56b83be37e52f812ae33bfb645236c6925734dbf [2022-12-14 08:44:35,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:44:35,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:44:35,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:44:35,663 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:44:35,663 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:44:35,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c [2022-12-14 08:44:38,243 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:44:38,386 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:44:38,387 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c [2022-12-14 08:44:38,392 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/data/93ef5ba08/e4cc62a6250c4ca3aa92caa011a30984/FLAGd2b4b471b [2022-12-14 08:44:38,406 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/data/93ef5ba08/e4cc62a6250c4ca3aa92caa011a30984 [2022-12-14 08:44:38,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:44:38,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:44:38,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:44:38,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:44:38,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:44:38,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:44:38" (1/1) ... [2022-12-14 08:44:38,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43d45952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:38, skipping insertion in model container [2022-12-14 08:44:38,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:44:38" (1/1) ... [2022-12-14 08:44:38,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:44:38,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:44:38,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:44:38,568 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:44:38,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:44:38,598 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:44:38,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:38 WrapperNode [2022-12-14 08:44:38,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:44:38,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:44:38,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:44:38,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:44:38,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:38" (1/1) ... [2022-12-14 08:44:38,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:38" (1/1) ... [2022-12-14 08:44:38,626 INFO L138 Inliner]: procedures = 8, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2022-12-14 08:44:38,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:44:38,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:44:38,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:44:38,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:44:38,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:38" (1/1) ... [2022-12-14 08:44:38,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:38" (1/1) ... [2022-12-14 08:44:38,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:38" (1/1) ... [2022-12-14 08:44:38,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:38" (1/1) ... [2022-12-14 08:44:38,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:38" (1/1) ... [2022-12-14 08:44:38,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:38" (1/1) ... [2022-12-14 08:44:38,646 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:38" (1/1) ... [2022-12-14 08:44:38,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:38" (1/1) ... [2022-12-14 08:44:38,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:44:38,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:44:38,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:44:38,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:44:38,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:38" (1/1) ... [2022-12-14 08:44:38,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:44:38,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:44:38,678 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:44:38,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:44:38,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 08:44:38,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:44:38,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:44:38,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 08:44:38,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 08:44:38,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:44:38,761 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:44:38,763 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:44:38,859 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:44:38,876 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:44:38,876 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 08:44:38,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:44:38 BoogieIcfgContainer [2022-12-14 08:44:38,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:44:38,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:44:38,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:44:38,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:44:38,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:44:38" (1/3) ... [2022-12-14 08:44:38,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b82235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:44:38, skipping insertion in model container [2022-12-14 08:44:38,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:38" (2/3) ... [2022-12-14 08:44:38,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b82235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:44:38, skipping insertion in model container [2022-12-14 08:44:38,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:44:38" (3/3) ... [2022-12-14 08:44:38,885 INFO L112 eAbstractionObserver]: Analyzing ICFG Arrays01-EquivalentConstantIndices-1.c [2022-12-14 08:44:38,899 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:44:38,899 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-12-14 08:44:38,931 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:44:38,936 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@a7d3d6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:44:38,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-12-14 08:44:38,939 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:38,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:44:38,944 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:44:38,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:44:38,945 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 08:44:38,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:44:38,949 INFO L85 PathProgramCache]: Analyzing trace with hash 77524, now seen corresponding path program 1 times [2022-12-14 08:44:38,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:44:38,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157367908] [2022-12-14 08:44:38,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:38,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:44:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:44:39,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:44:39,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157367908] [2022-12-14 08:44:39,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157367908] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:44:39,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:44:39,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:44:39,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981144649] [2022-12-14 08:44:39,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:44:39,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:44:39,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:44:39,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:44:39,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:44:39,115 INFO L87 Difference]: Start difference. First operand has 19 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 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) [2022-12-14 08:44:39,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:44:39,145 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2022-12-14 08:44:39,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:44:39,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 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 [2022-12-14 08:44:39,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:44:39,153 INFO L225 Difference]: With dead ends: 23 [2022-12-14 08:44:39,153 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 08:44:39,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:44:39,156 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:44:39,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 26 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:44:39,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 08:44:39,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2022-12-14 08:44:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 10 states have (on average 2.0) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:39,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-12-14 08:44:39,179 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 3 [2022-12-14 08:44:39,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:44:39,180 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-12-14 08:44:39,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 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) [2022-12-14 08:44:39,180 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-12-14 08:44:39,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:44:39,181 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:44:39,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:44:39,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:44:39,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 08:44:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:44:39,182 INFO L85 PathProgramCache]: Analyzing trace with hash 76241, now seen corresponding path program 1 times [2022-12-14 08:44:39,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:44:39,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483196931] [2022-12-14 08:44:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:39,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:44:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:44:39,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:44:39,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483196931] [2022-12-14 08:44:39,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483196931] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:44:39,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:44:39,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:44:39,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753604146] [2022-12-14 08:44:39,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:44:39,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:44:39,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:44:39,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:44:39,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:44:39,224 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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) [2022-12-14 08:44:39,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:44:39,245 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-12-14 08:44:39,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:44:39,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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 [2022-12-14 08:44:39,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:44:39,246 INFO L225 Difference]: With dead ends: 15 [2022-12-14 08:44:39,246 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 08:44:39,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:44:39,248 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:44:39,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 4 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:44:39,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 08:44:39,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 08:44:39,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:39,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-12-14 08:44:39,251 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 3 [2022-12-14 08:44:39,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:44:39,251 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-12-14 08:44:39,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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) [2022-12-14 08:44:39,251 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-12-14 08:44:39,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:44:39,251 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:44:39,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:44:39,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:44:39,252 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 08:44:39,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:44:39,253 INFO L85 PathProgramCache]: Analyzing trace with hash 76242, now seen corresponding path program 1 times [2022-12-14 08:44:39,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:44:39,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806487179] [2022-12-14 08:44:39,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:39,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:44:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:44:39,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:44:39,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806487179] [2022-12-14 08:44:39,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806487179] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:44:39,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:44:39,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:44:39,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802761880] [2022-12-14 08:44:39,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:44:39,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:44:39,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:44:39,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:44:39,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:44:39,324 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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) [2022-12-14 08:44:39,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:44:39,347 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2022-12-14 08:44:39,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:44:39,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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 [2022-12-14 08:44:39,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:44:39,348 INFO L225 Difference]: With dead ends: 16 [2022-12-14 08:44:39,348 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 08:44:39,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:44:39,350 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:44:39,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:44:39,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 08:44:39,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 08:44:39,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:39,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-12-14 08:44:39,353 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 3 [2022-12-14 08:44:39,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:44:39,354 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-12-14 08:44:39,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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) [2022-12-14 08:44:39,354 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-12-14 08:44:39,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 08:44:39,354 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:44:39,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 08:44:39,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:44:39,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 08:44:39,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:44:39,356 INFO L85 PathProgramCache]: Analyzing trace with hash 73304764, now seen corresponding path program 1 times [2022-12-14 08:44:39,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:44:39,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481958912] [2022-12-14 08:44:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:39,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:44:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:44:39,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:44:39,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481958912] [2022-12-14 08:44:39,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481958912] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:44:39,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110152843] [2022-12-14 08:44:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:39,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:39,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:44:39,413 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:44:39,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:44:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:39,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:44:39,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:44:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:44:39,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:44:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:44:39,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110152843] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:44:39,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1815155506] [2022-12-14 08:44:39,521 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 08:44:39,521 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:44:39,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:44:39,528 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:44:39,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:44:39,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:44:39,611 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 16 treesize of output 12 [2022-12-14 08:44:39,706 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 139 treesize of output 129 [2022-12-14 08:44:39,780 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 16 treesize of output 12 [2022-12-14 08:44:39,804 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 16 treesize of output 12 [2022-12-14 08:44:39,833 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:44:40,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1815155506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:44:40,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:44:40,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2022-12-14 08:44:40,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115321348] [2022-12-14 08:44:40,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:44:40,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:44:40,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:44:40,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:44:40,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:44:40,016 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:40,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:44:40,130 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2022-12-14 08:44:40,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:44:40,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 08:44:40,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:44:40,131 INFO L225 Difference]: With dead ends: 13 [2022-12-14 08:44:40,131 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 08:44:40,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:44:40,132 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:44:40,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 6 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:44:40,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 08:44:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-12-14 08:44:40,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:40,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-12-14 08:44:40,135 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 5 [2022-12-14 08:44:40,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:44:40,135 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-12-14 08:44:40,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:40,135 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-12-14 08:44:40,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 08:44:40,135 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:44:40,136 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-12-14 08:44:40,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:44:40,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:40,338 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 08:44:40,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:44:40,340 INFO L85 PathProgramCache]: Analyzing trace with hash 73303481, now seen corresponding path program 1 times [2022-12-14 08:44:40,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:44:40,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201465936] [2022-12-14 08:44:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:40,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:44:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:44:40,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:44:40,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201465936] [2022-12-14 08:44:40,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201465936] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:44:40,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984989048] [2022-12-14 08:44:40,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:40,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:40,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:44:40,530 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:44:40,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:44:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:40,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:44:40,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:44:40,591 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 [2022-12-14 08:44:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:44:40,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:44:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:44:40,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984989048] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:44:40,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1861084145] [2022-12-14 08:44:40,649 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-12-14 08:44:40,650 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:44:40,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:44:40,650 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:44:40,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:44:40,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:44:40,677 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 16 treesize of output 12 [2022-12-14 08:44:40,709 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 139 treesize of output 129 [2022-12-14 08:44:40,748 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 16 treesize of output 12 [2022-12-14 08:44:40,764 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 16 treesize of output 12 [2022-12-14 08:44:40,775 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:44:40,924 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '228#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet1#1|)) (<= |ULTIMATE.start_main_#t~nondet1#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (not (<= (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#a~0#1.base|))) (= |#NULL.base| 0))' at error location [2022-12-14 08:44:40,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:44:40,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:44:40,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-14 08:44:40,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602785754] [2022-12-14 08:44:40,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:44:40,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:44:40,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:44:40,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:44:40,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:44:40,927 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:44:40,989 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-12-14 08:44:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:44:40,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 08:44:40,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:44:40,991 INFO L225 Difference]: With dead ends: 29 [2022-12-14 08:44:40,991 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 08:44:40,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:44:40,992 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:44:40,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 15 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:44:40,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 08:44:40,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2022-12-14 08:44:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:40,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-12-14 08:44:40,994 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 5 [2022-12-14 08:44:40,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:44:40,995 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-12-14 08:44:40,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:40,995 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-12-14 08:44:40,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 08:44:40,995 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:44:40,995 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 08:44:40,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:44:41,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:41,197 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 08:44:41,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:44:41,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1994730941, now seen corresponding path program 1 times [2022-12-14 08:44:41,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:44:41,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078507647] [2022-12-14 08:44:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:41,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:44:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:44:41,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:44:41,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078507647] [2022-12-14 08:44:41,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078507647] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:44:41,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574582923] [2022-12-14 08:44:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:41,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:41,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:44:41,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:44:41,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:44:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:41,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 08:44:41,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:44:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:44:41,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:44:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:44:41,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574582923] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:44:41,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1750126895] [2022-12-14 08:44:41,379 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 08:44:41,379 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:44:41,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:44:41,379 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:44:41,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:44:41,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:44:41,404 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 [2022-12-14 08:44:41,443 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 08:44:41,443 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 129 treesize of output 130 [2022-12-14 08:44:41,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:44:41,523 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 16 treesize of output 12 [2022-12-14 08:44:41,555 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:44:41,570 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:44:41,916 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '344#(and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (exists ((|v_ULTIMATE.start_main_~#a~0#1.base_23| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#a~0#1.base_23|) (<= (* |ULTIMATE.start_main_~i~0#1| 4) (select |#length| |v_ULTIMATE.start_main_~#a~0#1.base_23|)) (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_23|) (+ (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483647) (not (<= 0 (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_23|) 12))) (= (select |#valid| |v_ULTIMATE.start_main_~#a~0#1.base_23|) 0) (<= 16 (select |#length| |v_ULTIMATE.start_main_~#a~0#1.base_23|)) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_23|) (+ (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483648)))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:44:41,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:44:41,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:44:41,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-14 08:44:41,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136830932] [2022-12-14 08:44:41,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:44:41,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 08:44:41,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:44:41,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 08:44:41,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-12-14 08:44:41,919 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:41,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:44:41,941 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2022-12-14 08:44:41,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:44:41,941 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 08:44:41,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:44:41,942 INFO L225 Difference]: With dead ends: 23 [2022-12-14 08:44:41,942 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 08:44:41,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-12-14 08:44:41,943 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:44:41,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:44:41,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 08:44:41,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-12-14 08:44:41,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-12-14 08:44:41,945 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 10 [2022-12-14 08:44:41,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:44:41,946 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-12-14 08:44:41,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:41,946 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-12-14 08:44:41,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 08:44:41,946 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:44:41,946 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2022-12-14 08:44:41,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:44:42,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 08:44:42,147 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 08:44:42,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:44:42,148 INFO L85 PathProgramCache]: Analyzing trace with hash 556803822, now seen corresponding path program 2 times [2022-12-14 08:44:42,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:44:42,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360276840] [2022-12-14 08:44:42,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:42,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:44:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:44:42,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:44:42,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360276840] [2022-12-14 08:44:42,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360276840] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:44:42,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142814364] [2022-12-14 08:44:42,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:44:42,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:42,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:44:42,369 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:44:42,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:44:42,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 08:44:42,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:44:42,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 08:44:42,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:44:42,410 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 [2022-12-14 08:44:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:44:42,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:44:42,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142814364] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:44:42,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:44:42,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2022-12-14 08:44:42,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102901856] [2022-12-14 08:44:42,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:44:42,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:44:42,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:44:42,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:44:42,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:44:42,470 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:42,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:44:42,487 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-12-14 08:44:42,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:44:42,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 08:44:42,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:44:42,488 INFO L225 Difference]: With dead ends: 21 [2022-12-14 08:44:42,488 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 08:44:42,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:44:42,489 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:44:42,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:44:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 08:44:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 08:44:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:42,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-12-14 08:44:42,493 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 11 [2022-12-14 08:44:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:44:42,493 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-12-14 08:44:42,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-12-14 08:44:42,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 08:44:42,494 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:44:42,494 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 08:44:42,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:44:42,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 08:44:42,696 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 08:44:42,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:44:42,697 INFO L85 PathProgramCache]: Analyzing trace with hash 737179937, now seen corresponding path program 2 times [2022-12-14 08:44:42,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:44:42,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347461169] [2022-12-14 08:44:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:42,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:44:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:44:42,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:44:42,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347461169] [2022-12-14 08:44:42,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347461169] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:44:42,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899105252] [2022-12-14 08:44:42,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:44:42,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:42,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:44:42,821 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:44:42,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:44:42,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 08:44:42,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:44:42,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:44:42,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:44:42,930 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#a~0#1.base_24| Int)) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#a~0#1.base_24| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#a~0#1.base_24|) 0))) is different from true [2022-12-14 08:44:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 08:44:42,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:44:42,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899105252] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:44:42,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:44:42,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2022-12-14 08:44:42,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16054550] [2022-12-14 08:44:42,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:44:42,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:44:42,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:44:42,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:44:42,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=53, Unknown=1, NotChecked=16, Total=110 [2022-12-14 08:44:42,932 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:42,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:44:42,941 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-12-14 08:44:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:44:42,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 08:44:42,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:44:42,942 INFO L225 Difference]: With dead ends: 20 [2022-12-14 08:44:42,942 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 08:44:42,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=53, Unknown=1, NotChecked=16, Total=110 [2022-12-14 08:44:42,942 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:44:42,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2022-12-14 08:44:42,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 08:44:42,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 08:44:42,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 08:44:42,943 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2022-12-14 08:44:42,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:44:42,943 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 08:44:42,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:44:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 08:44:42,943 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 08:44:42,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2022-12-14 08:44:42,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2022-12-14 08:44:42,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-12-14 08:44:42,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-12-14 08:44:42,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-12-14 08:44:42,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2022-12-14 08:44:42,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2022-12-14 08:44:42,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2022-12-14 08:44:42,946 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-12-14 08:44:42,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:44:43,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:43,155 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2022-12-14 08:44:43,160 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 08:44:43,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 08:44:43 BoogieIcfgContainer [2022-12-14 08:44:43,169 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 08:44:43,170 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 08:44:43,170 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 08:44:43,170 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 08:44:43,171 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:44:38" (3/4) ... [2022-12-14 08:44:43,179 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 08:44:43,193 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-12-14 08:44:43,193 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-12-14 08:44:43,194 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-14 08:44:43,194 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 08:44:43,216 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 08:44:43,216 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 08:44:43,216 INFO L158 Benchmark]: Toolchain (without parser) took 4807.41ms. Allocated memory was 121.6MB in the beginning and 243.3MB in the end (delta: 121.6MB). Free memory was 59.9MB in the beginning and 106.9MB in the end (delta: -47.0MB). Peak memory consumption was 77.6MB. Max. memory is 16.1GB. [2022-12-14 08:44:43,217 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 121.6MB. Free memory is still 88.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 08:44:43,217 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.17ms. Allocated memory was 121.6MB in the beginning and 243.3MB in the end (delta: 121.6MB). Free memory was 59.8MB in the beginning and 211.7MB in the end (delta: -151.9MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2022-12-14 08:44:43,217 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.74ms. Allocated memory is still 243.3MB. Free memory was 211.7MB in the beginning and 210.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:44:43,217 INFO L158 Benchmark]: Boogie Preprocessor took 21.01ms. Allocated memory is still 243.3MB. Free memory was 210.6MB in the beginning and 209.6MB in the end (delta: 997.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:44:43,217 INFO L158 Benchmark]: RCFGBuilder took 228.41ms. Allocated memory is still 243.3MB. Free memory was 209.6MB in the beginning and 197.0MB in the end (delta: 12.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 08:44:43,217 INFO L158 Benchmark]: TraceAbstraction took 4289.14ms. Allocated memory is still 243.3MB. Free memory was 197.0MB in the beginning and 109.0MB in the end (delta: 88.0MB). Peak memory consumption was 89.0MB. Max. memory is 16.1GB. [2022-12-14 08:44:43,218 INFO L158 Benchmark]: Witness Printer took 46.25ms. Allocated memory is still 243.3MB. Free memory was 109.0MB in the beginning and 106.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:44:43,219 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 121.6MB. Free memory is still 88.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 188.17ms. Allocated memory was 121.6MB in the beginning and 243.3MB in the end (delta: 121.6MB). Free memory was 59.8MB in the beginning and 211.7MB in the end (delta: -151.9MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.74ms. Allocated memory is still 243.3MB. Free memory was 211.7MB in the beginning and 210.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.01ms. Allocated memory is still 243.3MB. Free memory was 210.6MB in the beginning and 209.6MB in the end (delta: 997.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 228.41ms. Allocated memory is still 243.3MB. Free memory was 209.6MB in the beginning and 197.0MB in the end (delta: 12.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4289.14ms. Allocated memory is still 243.3MB. Free memory was 197.0MB in the beginning and 109.0MB in the end (delta: 88.0MB). Peak memory consumption was 89.0MB. Max. memory is 16.1GB. * Witness Printer took 46.25ms. Allocated memory is still 243.3MB. Free memory was 109.0MB in the beginning and 106.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 10]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 4.2s, OverallIterations: 8, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 63 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 63 mSDsluCounter, 87 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 9 IncrementalHoareTripleChecker+Unchecked, 40 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 158 IncrementalHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 47 mSDtfsCounter, 158 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=6, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 14 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 107 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 111 ConstructedInterpolants, 17 QuantifiedInterpolants, 826 SizeOfPredicates, 0 NumberOfNonLiveVariables, 223 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 16 InterpolantComputations, 5 PerfectInterpolantSequences, 56/133 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 5, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 11, TOOLS_POST_TIME: 0.2s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 11, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 24, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 5, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.2s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.2s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 40, DAG_COMPRESSION_RETAINED_NODES: 18, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-14 08:44:43,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd4a6d8-7c49-464d-9b4a-42687bdd0f4e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE