./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW --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 d69e4513fb8989bf305d8f9ce21862e8623f2a3d0c8146e8e7fb7e8c658a7eff --- 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-4e7fbc6 [2022-11-23 16:01:04,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:01:04,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:01:04,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:01:04,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:01:04,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:01:04,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:01:04,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:01:04,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:01:04,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:01:04,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:01:04,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:01:04,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:01:04,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:01:04,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:01:04,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:01:04,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:01:04,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:01:04,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:01:04,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:01:04,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:01:04,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:01:04,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:01:04,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:01:04,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:01:04,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:01:04,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:01:04,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:01:04,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:01:04,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:01:04,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:01:04,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:01:04,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:01:04,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:01:04,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:01:04,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:01:04,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:01:04,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:01:04,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:01:04,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:01:04,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:01:04,515 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-23 16:01:04,573 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:01:04,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:01:04,575 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:01:04,575 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:01:04,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:01:04,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:01:04,577 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:01:04,577 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:01:04,577 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:01:04,578 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 16:01:04,579 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:01:04,579 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:01:04,580 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 16:01:04,580 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 16:01:04,580 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:01:04,581 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 16:01:04,581 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 16:01:04,581 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 16:01:04,582 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 16:01:04,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 16:01:04,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:01:04,583 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 16:01:04,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:01:04,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:01:04,584 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 16:01:04,585 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 16:01:04,585 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 16:01:04,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:01:04,586 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 16:01:04,586 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:01:04,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:01:04,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:01:04,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:01:04,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:01:04,603 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 16:01:04,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:01:04,604 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 16:01:04,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 16:01:04,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:01:04,604 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_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d69e4513fb8989bf305d8f9ce21862e8623f2a3d0c8146e8e7fb7e8c658a7eff [2022-11-23 16:01:04,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:01:04,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:01:04,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:01:04,977 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:01:04,978 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:01:04,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2022-11-23 16:01:08,418 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:01:08,670 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:01:08,670 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2022-11-23 16:01:08,678 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/data/02ba86520/802188cc4c074aa4830a240dbc5e56f0/FLAG3b1faa63e [2022-11-23 16:01:08,702 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/data/02ba86520/802188cc4c074aa4830a240dbc5e56f0 [2022-11-23 16:01:08,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:01:08,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:01:08,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:01:08,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:01:08,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:01:08,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:01:08" (1/1) ... [2022-11-23 16:01:08,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40734651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:01:08, skipping insertion in model container [2022-11-23 16:01:08,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:01:08" (1/1) ... [2022-11-23 16:01:08,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:01:08,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:01:08,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:01:08,976 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:01:08,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:01:09,012 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:01:09,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:01:09 WrapperNode [2022-11-23 16:01:09,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:01:09,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:01:09,014 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:01:09,014 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:01:09,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:01:09" (1/1) ... [2022-11-23 16:01:09,029 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:01:09" (1/1) ... [2022-11-23 16:01:09,052 INFO L138 Inliner]: procedures = 8, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 48 [2022-11-23 16:01:09,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:01:09,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:01:09,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:01:09,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:01:09,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:01:09" (1/1) ... [2022-11-23 16:01:09,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:01:09" (1/1) ... [2022-11-23 16:01:09,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:01:09" (1/1) ... [2022-11-23 16:01:09,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:01:09" (1/1) ... [2022-11-23 16:01:09,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:01:09" (1/1) ... [2022-11-23 16:01:09,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:01:09" (1/1) ... [2022-11-23 16:01:09,078 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:01:09" (1/1) ... [2022-11-23 16:01:09,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:01:09" (1/1) ... [2022-11-23 16:01:09,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:01:09,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:01:09,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:01:09,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:01:09,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:01:09" (1/1) ... [2022-11-23 16:01:09,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:01:09,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:01:09,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:01:09,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:01:09,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 16:01:09,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:01:09,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:01:09,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 16:01:09,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 16:01:09,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 16:01:09,277 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:01:09,279 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:01:09,528 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:01:09,604 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:01:09,604 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 16:01:09,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:01:09 BoogieIcfgContainer [2022-11-23 16:01:09,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:01:09,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:01:09,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:01:09,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:01:09,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:01:08" (1/3) ... [2022-11-23 16:01:09,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2e54f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:01:09, skipping insertion in model container [2022-11-23 16:01:09,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:01:09" (2/3) ... [2022-11-23 16:01:09,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2e54f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:01:09, skipping insertion in model container [2022-11-23 16:01:09,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:01:09" (3/3) ... [2022-11-23 16:01:09,640 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Array-1.c [2022-11-23 16:01:09,661 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:01:09,661 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-11-23 16:01:09,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:01:09,761 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;@7db9de60, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:01:09,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-23 16:01:09,767 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 16:01:09,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:09,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 16:01:09,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-23 16:01:09,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:09,787 INFO L85 PathProgramCache]: Analyzing trace with hash 92578, now seen corresponding path program 1 times [2022-11-23 16:01:09,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:09,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774586147] [2022-11-23 16:01:09,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:09,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:01:10,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:10,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774586147] [2022-11-23 16:01:10,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774586147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:10,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:10,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 16:01:10,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672283698] [2022-11-23 16:01:10,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:10,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:10,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:10,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:10,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:10,275 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2022-11-23 16:01:10,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:10,373 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2022-11-23 16:01:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:10,376 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 [2022-11-23 16:01:10,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:10,385 INFO L225 Difference]: With dead ends: 18 [2022-11-23 16:01:10,393 INFO L226 Difference]: Without dead ends: 17 [2022-11-23 16:01:10,396 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 [2022-11-23 16:01:10,402 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:10,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 9 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:01:10,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-23 16:01:10,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-23 16:01:10,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:10,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-23 16:01:10,446 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 3 [2022-11-23 16:01:10,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:10,447 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-23 16:01:10,448 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) [2022-11-23 16:01:10,449 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-23 16:01:10,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 16:01:10,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:10,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 16:01:10,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 16:01:10,455 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-23 16:01:10,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:10,457 INFO L85 PathProgramCache]: Analyzing trace with hash 92579, now seen corresponding path program 1 times [2022-11-23 16:01:10,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:10,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985621048] [2022-11-23 16:01:10,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:10,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:01:10,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:10,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985621048] [2022-11-23 16:01:10,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985621048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:10,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:10,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 16:01:10,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534392868] [2022-11-23 16:01:10,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:10,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:10,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:10,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:10,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:10,668 INFO L87 Difference]: Start difference. First operand 17 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) [2022-11-23 16:01:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:10,750 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2022-11-23 16:01:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:10,751 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 [2022-11-23 16:01:10,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:10,753 INFO L225 Difference]: With dead ends: 30 [2022-11-23 16:01:10,753 INFO L226 Difference]: Without dead ends: 30 [2022-11-23 16:01:10,758 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 [2022-11-23 16:01:10,759 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:10,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 17 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:01:10,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-23 16:01:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 19. [2022-11-23 16:01:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-23 16:01:10,766 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 3 [2022-11-23 16:01:10,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:10,766 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-23 16:01:10,766 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) [2022-11-23 16:01:10,770 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-23 16:01:10,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 16:01:10,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:10,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 16:01:10,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 16:01:10,774 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-23 16:01:10,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:10,781 INFO L85 PathProgramCache]: Analyzing trace with hash 90706742, now seen corresponding path program 1 times [2022-11-23 16:01:10,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:10,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890889571] [2022-11-23 16:01:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:10,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:01:10,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:10,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890889571] [2022-11-23 16:01:10,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890889571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:10,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:10,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 16:01:10,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600357979] [2022-11-23 16:01:10,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:10,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:10,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:10,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:10,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:10,858 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:10,885 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-11-23 16:01:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:10,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 16:01:10,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:10,887 INFO L225 Difference]: With dead ends: 19 [2022-11-23 16:01:10,887 INFO L226 Difference]: Without dead ends: 19 [2022-11-23 16:01:10,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:10,891 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:10,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 25 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:01:10,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-23 16:01:10,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-23 16:01:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.5714285714285714) 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) [2022-11-23 16:01:10,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-23 16:01:10,901 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 5 [2022-11-23 16:01:10,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:10,902 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-23 16:01:10,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:10,902 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-23 16:01:10,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 16:01:10,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:10,903 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-23 16:01:10,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 16:01:10,904 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-23 16:01:10,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:10,904 INFO L85 PathProgramCache]: Analyzing trace with hash 89019675, now seen corresponding path program 1 times [2022-11-23 16:01:10,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:10,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170707672] [2022-11-23 16:01:10,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:10,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:01:11,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:11,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170707672] [2022-11-23 16:01:11,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170707672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:11,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:11,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:11,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245727797] [2022-11-23 16:01:11,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:11,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:01:11,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:11,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:01:11,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:01:11,184 INFO L87 Difference]: Start difference. First operand 19 states and 22 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) [2022-11-23 16:01:11,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:11,230 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2022-11-23 16:01:11,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:01:11,231 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 [2022-11-23 16:01:11,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:11,232 INFO L225 Difference]: With dead ends: 18 [2022-11-23 16:01:11,232 INFO L226 Difference]: Without dead ends: 18 [2022-11-23 16:01:11,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:01:11,234 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:11,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 18 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:01:11,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-23 16:01:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-11-23 16:01:11,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:11,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-23 16:01:11,238 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 5 [2022-11-23 16:01:11,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:11,243 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-23 16:01:11,243 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) [2022-11-23 16:01:11,244 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-23 16:01:11,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 16:01:11,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:11,244 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:11,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 16:01:11,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-23 16:01:11,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:11,247 INFO L85 PathProgramCache]: Analyzing trace with hash -349699922, now seen corresponding path program 1 times [2022-11-23 16:01:11,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:11,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868801926] [2022-11-23 16:01:11,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:11,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:01:11,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:11,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868801926] [2022-11-23 16:01:11,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868801926] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:01:11,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78775012] [2022-11-23 16:01:11,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:11,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:01:11,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:01:11,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:01:11,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 16:01:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:11,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 16:01:11,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:01:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:01:11,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:01:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:01:11,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78775012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:01:11,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1166651038] [2022-11-23 16:01:11,576 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 16:01:11,576 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:01:11,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:01:11,598 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:01:11,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:01:11,719 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 [2022-11-23 16:01:11,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:01:12,061 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 16:01:12,063 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 135 treesize of output 136 [2022-11-23 16:01:12,250 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 [2022-11-23 16:01:12,274 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:01:12,448 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '238#(and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (not (<= (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#a~0#1.base|))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) |ULTIMATE.start_main_#t~short3#1| (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:01:12,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:01:12,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:01:12,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-23 16:01:12,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854666051] [2022-11-23 16:01:12,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:01:12,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:01:12,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:01:12,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-23 16:01:12,457 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:12,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:12,525 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-11-23 16:01:12,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:01:12,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 16:01:12,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:12,529 INFO L225 Difference]: With dead ends: 23 [2022-11-23 16:01:12,530 INFO L226 Difference]: Without dead ends: 23 [2022-11-23 16:01:12,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-23 16:01:12,535 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:12,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 48 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:01:12,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-23 16:01:12,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-23 16:01:12,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-23 16:01:12,548 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 7 [2022-11-23 16:01:12,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:12,548 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-23 16:01:12,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-23 16:01:12,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 16:01:12,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:12,550 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-23 16:01:12,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 16:01:12,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:01:12,758 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-23 16:01:12,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:12,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1400580842, now seen corresponding path program 2 times [2022-11-23 16:01:12,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:12,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994500405] [2022-11-23 16:01:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:12,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 16:01:12,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:12,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994500405] [2022-11-23 16:01:12,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994500405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:12,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:12,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 16:01:12,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043131029] [2022-11-23 16:01:12,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:12,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:12,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:12,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:12,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:12,919 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:12,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:12,967 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-11-23 16:01:12,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:12,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 16:01:12,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:12,971 INFO L225 Difference]: With dead ends: 31 [2022-11-23 16:01:12,972 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 16:01:12,972 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 [2022-11-23 16:01:12,975 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:12,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 16 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:01:12,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 16:01:12,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-11-23 16:01:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-11-23 16:01:12,985 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 13 [2022-11-23 16:01:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:12,986 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-11-23 16:01:12,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-11-23 16:01:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 16:01:12,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:12,987 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:12,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 16:01:12,987 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-23 16:01:12,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:12,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1633238247, now seen corresponding path program 1 times [2022-11-23 16:01:12,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:12,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813171891] [2022-11-23 16:01:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:12,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 16:01:13,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:13,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813171891] [2022-11-23 16:01:13,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813171891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:13,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:13,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:13,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112685780] [2022-11-23 16:01:13,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:13,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:01:13,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:13,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:01:13,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:01:13,095 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:13,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:13,154 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-11-23 16:01:13,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:01:13,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-23 16:01:13,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:13,156 INFO L225 Difference]: With dead ends: 33 [2022-11-23 16:01:13,156 INFO L226 Difference]: Without dead ends: 33 [2022-11-23 16:01:13,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:01:13,157 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:13,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:01:13,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-23 16:01:13,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-11-23 16:01:13,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:13,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-11-23 16:01:13,162 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 15 [2022-11-23 16:01:13,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:13,163 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-11-23 16:01:13,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:13,163 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-11-23 16:01:13,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 16:01:13,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:13,164 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:13,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 16:01:13,165 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)] === [2022-11-23 16:01:13,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:13,166 INFO L85 PathProgramCache]: Analyzing trace with hash 904436111, now seen corresponding path program 1 times [2022-11-23 16:01:13,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:13,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225478379] [2022-11-23 16:01:13,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:13,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:01:13,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:13,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225478379] [2022-11-23 16:01:13,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225478379] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:01:13,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985306302] [2022-11-23 16:01:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:13,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:01:13,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:01:13,272 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:01:13,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 16:01:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:13,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 16:01:13,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:01:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:01:13,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:01:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:01:13,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985306302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:01:13,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [635812469] [2022-11-23 16:01:13,489 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 16:01:13,489 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:01:13,490 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:01:13,490 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:01:13,490 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:01:13,516 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 [2022-11-23 16:01:13,552 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 [2022-11-23 16:01:13,722 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 145 treesize of output 135 [2022-11-23 16:01:13,809 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 [2022-11-23 16:01:13,848 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 [2022-11-23 16:01:13,883 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:01:14,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(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_29| Int)) (and (<= (+ (* |ULTIMATE.start_main_~k~0#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#a~0#1.base_29|)) (<= 0 |v_ULTIMATE.start_main_~#a~0#1.base_29|) (= (select |#valid| |v_ULTIMATE.start_main_~#a~0#1.base_29|) 0) (not (<= 0 (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_29|) (* |ULTIMATE.start_main_~k~0#1| 4)))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-23 16:01:14,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:01:14,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:01:14,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-23 16:01:14,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213262298] [2022-11-23 16:01:14,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:01:14,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 16:01:14,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:14,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 16:01:14,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-11-23 16:01:14,342 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:14,406 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-11-23 16:01:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 16:01:14,407 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 16:01:14,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:14,408 INFO L225 Difference]: With dead ends: 42 [2022-11-23 16:01:14,408 INFO L226 Difference]: Without dead ends: 42 [2022-11-23 16:01:14,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-11-23 16:01:14,409 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:14,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:01:14,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-23 16:01:14,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-23 16:01:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.236842105263158) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:14,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-11-23 16:01:14,414 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 16 [2022-11-23 16:01:14,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:14,415 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-11-23 16:01:14,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-11-23 16:01:14,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 16:01:14,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:14,416 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:14,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 16:01:14,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:01:14,622 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-23 16:01:14,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:14,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1783428929, now seen corresponding path program 2 times [2022-11-23 16:01:14,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:14,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342198513] [2022-11-23 16:01:14,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:14,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:01:14,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:14,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342198513] [2022-11-23 16:01:14,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342198513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:01:14,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039363891] [2022-11-23 16:01:14,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:01:14,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:01:14,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:01:14,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:01:15,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 16:01:15,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-23 16:01:15,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:01:15,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 16:01:15,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:01:15,271 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#a~0#1.base_30| Int)) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#a~0#1.base_30| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#a~0#1.base_30|) 0))) is different from true [2022-11-23 16:01:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 16:01:15,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:01:15,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039363891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:15,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:01:15,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2022-11-23 16:01:15,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835016233] [2022-11-23 16:01:15,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:15,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:01:15,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:15,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:01:15,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=103, Unknown=1, NotChecked=24, Total=210 [2022-11-23 16:01:15,276 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:15,295 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-11-23 16:01:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:01:15,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-23 16:01:15,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:15,296 INFO L225 Difference]: With dead ends: 41 [2022-11-23 16:01:15,296 INFO L226 Difference]: Without dead ends: 39 [2022-11-23 16:01:15,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=103, Unknown=1, NotChecked=24, Total=210 [2022-11-23 16:01:15,298 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:15,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2022-11-23 16:01:15,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-23 16:01:15,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-23 16:01:15,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:15,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-11-23 16:01:15,302 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 28 [2022-11-23 16:01:15,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:15,303 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-11-23 16:01:15,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:15,303 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-11-23 16:01:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 16:01:15,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:15,304 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:15,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 16:01:15,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 16:01:15,511 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-23 16:01:15,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:15,512 INFO L85 PathProgramCache]: Analyzing trace with hash -181882288, now seen corresponding path program 1 times [2022-11-23 16:01:15,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:15,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338582679] [2022-11-23 16:01:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:15,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:01:15,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:15,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338582679] [2022-11-23 16:01:15,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338582679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:01:15,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860296325] [2022-11-23 16:01:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:15,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:01:15,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:01:15,814 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:01:15,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 16:01:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:15,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 16:01:15,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:01:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:01:15,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:01:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:01:16,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860296325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:01:16,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [438671290] [2022-11-23 16:01:16,265 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:01:16,265 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:01:16,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:01:16,266 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:01:16,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:01:16,282 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 [2022-11-23 16:01:16,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:01:16,404 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 16:01:16,405 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 135 treesize of output 136 [2022-11-23 16:01:16,490 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 [2022-11-23 16:01:16,718 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:01:17,282 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '990#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= 1048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (not (<= (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#a~0#1.base|))) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (< |ULTIMATE.start_main_~k~0#1| 1048) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= |#NULL.base| 0) |ULTIMATE.start_main_#t~short3#1| (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-23 16:01:17,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:01:17,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:01:17,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-23 16:01:17,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058006319] [2022-11-23 16:01:17,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:01:17,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 16:01:17,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:17,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 16:01:17,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=631, Unknown=0, NotChecked=0, Total=930 [2022-11-23 16:01:17,285 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:17,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:17,389 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2022-11-23 16:01:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 16:01:17,389 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-23 16:01:17,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:17,390 INFO L225 Difference]: With dead ends: 63 [2022-11-23 16:01:17,390 INFO L226 Difference]: Without dead ends: 63 [2022-11-23 16:01:17,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=299, Invalid=631, Unknown=0, NotChecked=0, Total=930 [2022-11-23 16:01:17,392 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:17,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 54 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:01:17,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-23 16:01:17,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-23 16:01:17,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 62 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-11-23 16:01:17,397 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 30 [2022-11-23 16:01:17,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:17,397 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-11-23 16:01:17,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:17,398 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-11-23 16:01:17,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 16:01:17,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:17,399 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:17,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 16:01:17,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 16:01:17,605 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-23 16:01:17,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:17,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1536581456, now seen corresponding path program 2 times [2022-11-23 16:01:17,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:17,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558476310] [2022-11-23 16:01:17,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:17,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:01:18,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:18,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558476310] [2022-11-23 16:01:18,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558476310] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:01:18,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109539030] [2022-11-23 16:01:18,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:01:18,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:01:18,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:01:18,515 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:01:18,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 16:01:18,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 16:01:18,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:01:18,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 16:01:18,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:01:18,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:01:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-23 16:01:19,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:01:19,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109539030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:19,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:01:19,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [24] total 28 [2022-11-23 16:01:19,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934902346] [2022-11-23 16:01:19,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:19,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:01:19,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:19,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:01:19,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2022-11-23 16:01:19,047 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:19,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:19,152 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2022-11-23 16:01:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 16:01:19,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-23 16:01:19,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:19,153 INFO L225 Difference]: With dead ends: 63 [2022-11-23 16:01:19,153 INFO L226 Difference]: Without dead ends: 0 [2022-11-23 16:01:19,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=319, Invalid=551, Unknown=0, NotChecked=0, Total=870 [2022-11-23 16:01:19,155 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:19,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 15 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:01:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-23 16:01:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-23 16:01:19,156 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) [2022-11-23 16:01:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-23 16:01:19,156 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2022-11-23 16:01:19,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:19,156 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-23 16:01:19,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:19,156 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-23 16:01:19,157 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-23 16:01:19,165 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2022-11-23 16:01:19,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2022-11-23 16:01:19,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-11-23 16:01:19,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-11-23 16:01:19,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-11-23 16:01:19,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2022-11-23 16:01:19,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2022-11-23 16:01:19,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2022-11-23 16:01:19,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-11-23 16:01:19,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 16:01:19,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:01:19,378 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 16:01:19,380 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 16:01:19,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 04:01:19 BoogieIcfgContainer [2022-11-23 16:01:19,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 16:01:19,384 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 16:01:19,384 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 16:01:19,384 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 16:01:19,385 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:01:09" (3/4) ... [2022-11-23 16:01:19,388 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-23 16:01:19,400 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-11-23 16:01:19,400 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-23 16:01:19,400 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-23 16:01:19,400 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-23 16:01:19,438 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 16:01:19,438 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 16:01:19,439 INFO L158 Benchmark]: Toolchain (without parser) took 10730.27ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 131.6MB in the beginning and 135.3MB in the end (delta: -3.7MB). Peak memory consumption was 30.3MB. Max. memory is 16.1GB. [2022-11-23 16:01:19,439 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 117.4MB. Free memory is still 87.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 16:01:19,440 INFO L158 Benchmark]: CACSL2BoogieTranslator took 300.35ms. Allocated memory is still 159.4MB. Free memory was 131.4MB in the beginning and 123.2MB in the end (delta: 8.2MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2022-11-23 16:01:19,440 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.66ms. Allocated memory is still 159.4MB. Free memory was 123.2MB in the beginning and 121.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 16:01:19,441 INFO L158 Benchmark]: Boogie Preprocessor took 28.20ms. Allocated memory is still 159.4MB. Free memory was 121.8MB in the beginning and 120.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 16:01:19,441 INFO L158 Benchmark]: RCFGBuilder took 541.01ms. Allocated memory is still 159.4MB. Free memory was 120.4MB in the beginning and 107.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-23 16:01:19,442 INFO L158 Benchmark]: TraceAbstraction took 9756.54ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 107.1MB in the beginning and 137.2MB in the end (delta: -30.1MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. [2022-11-23 16:01:19,442 INFO L158 Benchmark]: Witness Printer took 54.66ms. Allocated memory is still 192.9MB. Free memory was 137.2MB in the beginning and 135.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 16:01:19,444 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 117.4MB. Free memory is still 87.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 300.35ms. Allocated memory is still 159.4MB. Free memory was 131.4MB in the beginning and 123.2MB in the end (delta: 8.2MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.66ms. Allocated memory is still 159.4MB. Free memory was 123.2MB in the beginning and 121.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.20ms. Allocated memory is still 159.4MB. Free memory was 121.8MB in the beginning and 120.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 541.01ms. Allocated memory is still 159.4MB. Free memory was 120.4MB in the beginning and 107.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 9756.54ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 107.1MB in the beginning and 137.2MB in the end (delta: -30.1MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. * Witness Printer took 54.66ms. Allocated memory is still 192.9MB. Free memory was 137.2MB in the beginning and 135.3MB in the end (delta: 1.8MB). 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, 22 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 9.7s, OverallIterations: 11, TraceHistogramMax: 22, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 124 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 124 mSDsluCounter, 293 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 17 IncrementalHoareTripleChecker+Unchecked, 187 mSDsCounter, 39 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 318 IncrementalHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 39 mSolverCounterUnsat, 106 mSDtfsCounter, 318 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 303 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=10, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 314 NumberOfCodeBlocks, 252 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 348 ConstructedInterpolants, 27 QuantifiedInterpolants, 1840 SizeOfPredicates, 1 NumberOfNonLiveVariables, 414 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 19 InterpolantComputations, 8 PerfectInterpolantSequences, 633/1568 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: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-23 16:01:19,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a86e06-2857-4bed-9344-e0cb1415b5d6/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE