./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/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_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/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_5bddf236-c788-4a7a-a09f-7a6abc706306/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 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 --- 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 14:05:09,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:05:09,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:05:09,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:05:09,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:05:09,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:05:09,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:05:09,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:05:09,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:05:09,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:05:09,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:05:09,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:05:09,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:05:09,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:05:09,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:05:09,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:05:09,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:05:09,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:05:09,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:05:09,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:05:09,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:05:09,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:05:09,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:05:09,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:05:09,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:05:09,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:05:09,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:05:09,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:05:09,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:05:09,614 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:05:09,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:05:09,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:05:09,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:05:09,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:05:09,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:05:09,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:05:09,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:05:09,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:05:09,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:05:09,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:05:09,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:05:09,626 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-23 14:05:09,665 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:05:09,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:05:09,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:05:09,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:05:09,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:05:09,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:05:09,667 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:05:09,667 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:05:09,667 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:05:09,668 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:05:09,669 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:05:09,669 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:05:09,669 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:05:09,669 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:05:09,670 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:05:09,670 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:05:09,670 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:05:09,670 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:05:09,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:05:09,671 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:05:09,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:05:09,672 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:05:09,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:05:09,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:05:09,672 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:05:09,672 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:05:09,673 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:05:09,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:05:09,673 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:05:09,673 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:05:09,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:05:09,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:05:09,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:05:09,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:05:09,675 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:05:09,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:05:09,675 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:05:09,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:05:09,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:05:09,676 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_5bddf236-c788-4a7a-a09f-7a6abc706306/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 [2022-11-23 14:05:09,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:05:09,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:05:09,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:05:09,975 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:05:09,976 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:05:09,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c [2022-11-23 14:05:13,093 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:05:13,332 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:05:13,333 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c [2022-11-23 14:05:13,339 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/data/f1505d96c/db6ea67d70f14be2a245492220db35ac/FLAGc8971fa6b [2022-11-23 14:05:13,353 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/data/f1505d96c/db6ea67d70f14be2a245492220db35ac [2022-11-23 14:05:13,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:05:13,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:05:13,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:05:13,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:05:13,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:05:13,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:05:13" (1/1) ... [2022-11-23 14:05:13,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2acf704f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:13, skipping insertion in model container [2022-11-23 14:05:13,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:05:13" (1/1) ... [2022-11-23 14:05:13,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:05:13,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:05:13,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:05:13,551 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:05:13,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:05:13,578 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:05:13,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:13 WrapperNode [2022-11-23 14:05:13,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:05:13,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:05:13,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:05:13,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:05:13,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:13" (1/1) ... [2022-11-23 14:05:13,592 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:13" (1/1) ... [2022-11-23 14:05:13,606 INFO L138 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2022-11-23 14:05:13,607 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:05:13,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:05:13,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:05:13,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:05:13,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:13" (1/1) ... [2022-11-23 14:05:13,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:13" (1/1) ... [2022-11-23 14:05:13,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:13" (1/1) ... [2022-11-23 14:05:13,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:13" (1/1) ... [2022-11-23 14:05:13,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:13" (1/1) ... [2022-11-23 14:05:13,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:13" (1/1) ... [2022-11-23 14:05:13,633 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:13" (1/1) ... [2022-11-23 14:05:13,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:13" (1/1) ... [2022-11-23 14:05:13,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:05:13,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:05:13,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:05:13,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:05:13,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:13" (1/1) ... [2022-11-23 14:05:13,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:05:13,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:13,688 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:05:13,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:05:13,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:05:13,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:05:13,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:05:13,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:05:13,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:05:13,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:05:13,821 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:05:13,824 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:05:14,078 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:05:14,128 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:05:14,128 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 14:05:14,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:05:14 BoogieIcfgContainer [2022-11-23 14:05:14,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:05:14,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:05:14,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:05:14,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:05:14,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:05:13" (1/3) ... [2022-11-23 14:05:14,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d5f9216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:05:14, skipping insertion in model container [2022-11-23 14:05:14,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:13" (2/3) ... [2022-11-23 14:05:14,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d5f9216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:05:14, skipping insertion in model container [2022-11-23 14:05:14,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:05:14" (3/3) ... [2022-11-23 14:05:14,153 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-2.c [2022-11-23 14:05:14,195 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:05:14,196 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-23 14:05:14,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:05:14,263 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;@15ff875, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:05:14,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-23 14:05:14,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 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 14:05:14,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:05:14,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:14,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:05:14,273 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:05:14,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:14,279 INFO L85 PathProgramCache]: Analyzing trace with hash 99305, now seen corresponding path program 1 times [2022-11-23 14:05:14,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:14,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331128062] [2022-11-23 14:05:14,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:14,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:14,489 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 14:05:14,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:14,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331128062] [2022-11-23 14:05:14,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331128062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:14,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:14,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:05:14,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039581528] [2022-11-23 14:05:14,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:14,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:14,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:14,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:14,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:14,550 INFO L87 Difference]: Start difference. First operand has 27 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 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 14:05:14,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:14,658 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-11-23 14:05:14,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:05:14,661 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 14:05:14,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:14,669 INFO L225 Difference]: With dead ends: 39 [2022-11-23 14:05:14,669 INFO L226 Difference]: Without dead ends: 38 [2022-11-23 14:05:14,672 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 14:05:14,675 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:14,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 37 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:05:14,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-23 14:05:14,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-11-23 14:05:14,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.9) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:05:14,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-11-23 14:05:14,727 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 3 [2022-11-23 14:05:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:14,728 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-11-23 14:05:14,728 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 14:05:14,731 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-11-23 14:05:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:05:14,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:14,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:05:14,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:05:14,733 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:05:14,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:14,735 INFO L85 PathProgramCache]: Analyzing trace with hash 99306, now seen corresponding path program 1 times [2022-11-23 14:05:14,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:14,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886586019] [2022-11-23 14:05:14,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:14,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:14,887 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 14:05:14,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:14,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886586019] [2022-11-23 14:05:14,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886586019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:14,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:14,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:05:14,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204622908] [2022-11-23 14:05:14,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:14,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:14,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:14,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:14,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:14,898 INFO L87 Difference]: Start difference. First operand 30 states and 38 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 14:05:14,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:14,945 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-11-23 14:05:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:05:14,946 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 14:05:14,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:14,947 INFO L225 Difference]: With dead ends: 32 [2022-11-23 14:05:14,947 INFO L226 Difference]: Without dead ends: 32 [2022-11-23 14:05:14,948 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 14:05:14,949 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:14,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:05:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-23 14:05:14,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-23 14:05:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 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 14:05:14,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-23 14:05:14,955 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 3 [2022-11-23 14:05:14,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:14,955 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-23 14:05:14,955 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 14:05:14,956 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-23 14:05:14,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:05:14,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:14,956 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-23 14:05:14,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:05:14,957 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:05:14,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:14,958 INFO L85 PathProgramCache]: Analyzing trace with hash 95488166, now seen corresponding path program 1 times [2022-11-23 14:05:14,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:14,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674063471] [2022-11-23 14:05:14,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:14,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:05:15,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:15,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674063471] [2022-11-23 14:05:15,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674063471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:15,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023100643] [2022-11-23 14:05:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:15,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:15,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:15,227 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:05:15,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:05:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:15,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:05:15,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:15,361 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 14:05:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:05:15,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:05:15,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023100643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:05:15,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [612965920] [2022-11-23 14:05:15,499 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-23 14:05:15,500 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:05:15,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:05:15,509 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:05:15,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:05:15,550 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 14:05:15,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:05:15,708 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 14:05:15,709 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 141 treesize of output 142 [2022-11-23 14:05:15,907 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 14:05:15,938 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 14:05:15,960 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:05:16,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '202#(and (<= 0 |ULTIMATE.start_main_~q~0#1.offset|) (<= |ULTIMATE.start_main_#t~nondet3#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet3#1|)) (not (<= (+ |ULTIMATE.start_main_~q~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~q~0#1.base|))) (<= |ULTIMATE.start_main_~q~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:05:16,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:05:16,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:05:16,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2022-11-23 14:05:16,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235479635] [2022-11-23 14:05:16,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:05:16,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:05:16,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:16,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:05:16,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:05:16,297 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:05:16,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:16,461 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-11-23 14:05:16,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:05:16,463 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 14:05:16,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:16,463 INFO L225 Difference]: With dead ends: 36 [2022-11-23 14:05:16,464 INFO L226 Difference]: Without dead ends: 36 [2022-11-23 14:05:16,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:05:16,466 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:16,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 79 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:05:16,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-23 14:05:16,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-23 14:05:16,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 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 14:05:16,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-11-23 14:05:16,472 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 5 [2022-11-23 14:05:16,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:16,472 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-11-23 14:05:16,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:05:16,473 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-11-23 14:05:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:05:16,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:16,474 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-23 14:05:16,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:05:16,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:16,689 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:05:16,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:16,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1433174170, now seen corresponding path program 1 times [2022-11-23 14:05:16,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:16,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478245528] [2022-11-23 14:05:16,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:16,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:05:16,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:16,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478245528] [2022-11-23 14:05:16,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478245528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:16,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942290083] [2022-11-23 14:05:16,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:16,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:16,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:16,856 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:05:16,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:05:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:16,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:05:16,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:17,000 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 14:05:17,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:17,092 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 14:05:17,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942290083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:05:17,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1570326446] [2022-11-23 14:05:17,100 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 14:05:17,101 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:05:17,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:05:17,102 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:05:17,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:05:17,123 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 14:05:17,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:05:17,241 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 14:05:17,242 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 141 treesize of output 142 [2022-11-23 14:05:17,390 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 14:05:17,411 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 14:05:17,513 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:05:17,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '369#(and (= |ULTIMATE.start_main_~q~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_#t~short5#1| (exists ((|v_ULTIMATE.start_main_~q~0#1.base_32| Int) (|v_ULTIMATE.start_main_~q~0#1.offset_28| Int)) (and (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_32|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_28| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483647) (<= |v_ULTIMATE.start_main_~q~0#1.offset_28| 0) (<= 0 |v_ULTIMATE.start_main_~q~0#1.offset_28|) (= (select |#valid| |v_ULTIMATE.start_main_~q~0#1.base_32|) 1) (<= 4 (+ |v_ULTIMATE.start_main_~q~0#1.offset_28| (* |ULTIMATE.start_main_~i~0#1| 4))) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_32|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_28| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483648)) (<= (+ |v_ULTIMATE.start_main_~q~0#1.offset_28| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |v_ULTIMATE.start_main_~q~0#1.base_32|)))) (= |#NULL.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| 1048)) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| |ULTIMATE.start_main_~q~0#1.offset|) (<= 0 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_main_~q~0#1.base|) 1)) (= |#NULL.base| 0))' at error location [2022-11-23 14:05:17,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:05:17,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:05:17,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2022-11-23 14:05:17,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583546495] [2022-11-23 14:05:17,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:05:17,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 14:05:17,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:17,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 14:05:17,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:05:17,918 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 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 14:05:18,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:18,215 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-11-23 14:05:18,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 14:05:18,216 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 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 14:05:18,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:18,217 INFO L225 Difference]: With dead ends: 45 [2022-11-23 14:05:18,217 INFO L226 Difference]: Without dead ends: 45 [2022-11-23 14:05:18,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=676, Unknown=0, NotChecked=0, Total=930 [2022-11-23 14:05:18,218 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 100 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:18,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 32 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:05:18,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-23 14:05:18,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2022-11-23 14:05:18,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:05:18,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-23 14:05:18,223 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 13 [2022-11-23 14:05:18,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:18,224 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-23 14:05:18,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 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 14:05:18,224 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-23 14:05:18,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 14:05:18,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:18,225 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2022-11-23 14:05:18,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:05:18,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:18,426 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:05:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:18,427 INFO L85 PathProgramCache]: Analyzing trace with hash 691325135, now seen corresponding path program 1 times [2022-11-23 14:05:18,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:18,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733531634] [2022-11-23 14:05:18,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:18,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:18,772 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 14:05:18,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:18,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733531634] [2022-11-23 14:05:18,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733531634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:18,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667731830] [2022-11-23 14:05:18,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:18,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:18,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:18,776 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:05:18,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:05:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:18,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:05:18,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:18,944 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 14:05:18,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:19,224 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 14:05:19,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667731830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:05:19,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2015642168] [2022-11-23 14:05:19,227 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 14:05:19,228 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:05:19,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:05:19,228 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:05:19,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:05:19,252 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 14:05:19,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:05:19,363 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 14:05:19,363 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 141 treesize of output 142 [2022-11-23 14:05:19,461 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 14:05:19,484 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 14:05:19,548 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:05:19,944 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '647#(and (exists ((|v_ULTIMATE.start_main_~q~0#1.offset_30| Int) (|v_ULTIMATE.start_main_~q~0#1.base_34| Int)) (and (<= (+ |v_ULTIMATE.start_main_~q~0#1.offset_30| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |v_ULTIMATE.start_main_~q~0#1.base_34|)) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_34|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_30| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483648)) (= (select |#valid| |v_ULTIMATE.start_main_~q~0#1.base_34|) 1) (<= 4 (+ |v_ULTIMATE.start_main_~q~0#1.offset_30| (* |ULTIMATE.start_main_~i~0#1| 4))) (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_34|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_30| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483647) (<= |v_ULTIMATE.start_main_~q~0#1.offset_30| 0) (<= 0 |v_ULTIMATE.start_main_~q~0#1.offset_30|))) (not (<= (+ |ULTIMATE.start_main_~q~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~q~0#1.base|))) (= |ULTIMATE.start_main_~q~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_#t~short5#1| (= |#NULL.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| 1048)) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| |ULTIMATE.start_main_~q~0#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:05:19,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:05:19,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:05:19,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 14:05:19,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007382560] [2022-11-23 14:05:19,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:05:19,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 14:05:19,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:19,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 14:05:19,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=557, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:05:19,947 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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 14:05:20,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:20,105 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2022-11-23 14:05:20,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 14:05:20,106 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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 25 [2022-11-23 14:05:20,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:20,107 INFO L225 Difference]: With dead ends: 63 [2022-11-23 14:05:20,107 INFO L226 Difference]: Without dead ends: 63 [2022-11-23 14:05:20,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=313, Invalid=557, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:05:20,109 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:20,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 80 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:05:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-23 14:05:20,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-23 14:05:20,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:05:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-11-23 14:05:20,114 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 25 [2022-11-23 14:05:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:20,115 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-11-23 14:05:20,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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 14:05:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-11-23 14:05:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 14:05:20,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:20,116 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2022-11-23 14:05:20,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:05:20,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:20,323 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:05:20,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:20,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1705035679, now seen corresponding path program 2 times [2022-11-23 14:05:20,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:20,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130407549] [2022-11-23 14:05:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:20,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:05:21,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:21,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130407549] [2022-11-23 14:05:21,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130407549] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:21,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485024523] [2022-11-23 14:05:21,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:05:21,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:21,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:21,119 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:05:21,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:05:21,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-23 14:05:21,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:05:21,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:05:21,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:21,207 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 14:05:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-23 14:05:21,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:05:21,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485024523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:21,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:05:21,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [24] total 26 [2022-11-23 14:05:21,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664474221] [2022-11-23 14:05:21,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:21,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:05:21,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:21,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:05:21,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2022-11-23 14:05:21,466 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 14:05:21,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:21,540 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-11-23 14:05:21,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:05:21,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 49 [2022-11-23 14:05:21,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:21,541 INFO L225 Difference]: With dead ends: 75 [2022-11-23 14:05:21,542 INFO L226 Difference]: Without dead ends: 75 [2022-11-23 14:05:21,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2022-11-23 14:05:21,543 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:21,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 13 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:05:21,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-23 14:05:21,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2022-11-23 14:05:21,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.171875) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 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 14:05:21,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2022-11-23 14:05:21,550 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 49 [2022-11-23 14:05:21,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:21,550 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2022-11-23 14:05:21,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 14:05:21,551 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2022-11-23 14:05:21,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-23 14:05:21,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:21,552 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:05:21,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:05:21,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 14:05:21,757 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:05:21,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:21,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2138032191, now seen corresponding path program 1 times [2022-11-23 14:05:21,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:21,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002115560] [2022-11-23 14:05:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:21,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-23 14:05:21,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:21,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002115560] [2022-11-23 14:05:21,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002115560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:21,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:21,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:05:21,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958747815] [2022-11-23 14:05:21,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:21,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:21,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:21,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:21,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:21,880 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 14:05:21,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:21,892 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-11-23 14:05:21,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:05:21,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 51 [2022-11-23 14:05:21,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:21,897 INFO L225 Difference]: With dead ends: 68 [2022-11-23 14:05:21,897 INFO L226 Difference]: Without dead ends: 68 [2022-11-23 14:05:21,897 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 14:05:21,899 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:21,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 12 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:05:21,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-23 14:05:21,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-23 14:05:21,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:05:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-11-23 14:05:21,918 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 51 [2022-11-23 14:05:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:21,921 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-11-23 14:05:21,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 14:05:21,921 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-11-23 14:05:21,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-23 14:05:21,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:21,925 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:05:21,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:05:21,925 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:05:21,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:21,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1654565084, now seen corresponding path program 1 times [2022-11-23 14:05:21,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:21,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286674210] [2022-11-23 14:05:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:21,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-23 14:05:22,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:22,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286674210] [2022-11-23 14:05:22,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286674210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:22,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:22,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:05:22,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725014080] [2022-11-23 14:05:22,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:22,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:05:22,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:22,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:05:22,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:05:22,097 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 14:05:22,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:22,146 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-11-23 14:05:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:05:22,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 53 [2022-11-23 14:05:22,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:22,147 INFO L225 Difference]: With dead ends: 73 [2022-11-23 14:05:22,148 INFO L226 Difference]: Without dead ends: 73 [2022-11-23 14:05:22,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:05:22,149 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:22,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:05:22,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-23 14:05:22,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2022-11-23 14:05:22,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.140625) internal successors, (73), 67 states have internal predecessors, (73), 0 states have call successors, (0), 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 14:05:22,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-11-23 14:05:22,171 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 53 [2022-11-23 14:05:22,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:22,172 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-11-23 14:05:22,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 14:05:22,172 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-11-23 14:05:22,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 14:05:22,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:22,174 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:05:22,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:05:22,174 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:05:22,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:22,175 INFO L85 PathProgramCache]: Analyzing trace with hash 143341699, now seen corresponding path program 1 times [2022-11-23 14:05:22,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:22,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349136794] [2022-11-23 14:05:22,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:22,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:05:22,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:22,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349136794] [2022-11-23 14:05:22,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349136794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:22,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490978408] [2022-11-23 14:05:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:22,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:22,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:22,900 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:05:22,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:05:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:23,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:05:23,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:05:23,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:05:24,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490978408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:05:24,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1092385478] [2022-11-23 14:05:24,090 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 14:05:24,090 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:05:24,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:05:24,091 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:05:24,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:05:24,104 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 14:05:24,127 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 14:05:24,181 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 151 treesize of output 141 [2022-11-23 14:05:24,239 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 14:05:24,255 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 14:05:24,373 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-23 14:05:24,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:05:24,419 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:05:25,633 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1748#(and (<= (+ |ULTIMATE.start_main_~q~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~q~0#1.base|)) (< |ULTIMATE.start_main_~p~0#1.base| |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (not (<= 0 (select (select |#memory_int| |ULTIMATE.start_main_~q~0#1.base|) |ULTIMATE.start_main_~q~0#1.offset|))) (or (exists ((|v_ULTIMATE.start_main_~q~0#1.offset_32| Int)) (and (<= (select (select |#memory_int| |ULTIMATE.start_main_~q~0#1.base|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483647) (<= 0 |v_ULTIMATE.start_main_~q~0#1.offset_32|) (<= (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~q~0#1.base|)) (<= |v_ULTIMATE.start_main_~q~0#1.offset_32| 0) (<= 4 (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (* |ULTIMATE.start_main_~i~0#1| 4))) (<= 0 (+ 2147483648 (select (select |#memory_int| |ULTIMATE.start_main_~q~0#1.base|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))))))) (exists ((|v_ULTIMATE.start_main_~q~0#1.offset_32| Int)) (and (exists ((|v_ULTIMATE.start_main_~q~0#1.base_36| Int)) (and (<= (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |v_ULTIMATE.start_main_~q~0#1.base_36|)) (= (select |#valid| |v_ULTIMATE.start_main_~q~0#1.base_36|) 1) (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_36|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483647) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~q~0#1.base_36|) (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) 2147483648)))) (<= 0 |v_ULTIMATE.start_main_~q~0#1.offset_32|) (<= |v_ULTIMATE.start_main_~q~0#1.offset_32| 0) (<= 4 (+ |v_ULTIMATE.start_main_~q~0#1.offset_32| (* |ULTIMATE.start_main_~i~0#1| 4)))))) (= |ULTIMATE.start_main_~q~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= |#NULL.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| 1048)) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| |ULTIMATE.start_main_~q~0#1.offset|) (<= 0 |#StackHeapBarrier|) (= (select |#valid| |ULTIMATE.start_main_~q~0#1.base|) 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-23 14:05:25,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:05:25,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:05:25,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-23 14:05:25,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908747577] [2022-11-23 14:05:25,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:05:25,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 14:05:25,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:25,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 14:05:25,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1200, Invalid=2106, Unknown=0, NotChecked=0, Total=3306 [2022-11-23 14:05:25,637 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 0 states have call successors, (0), 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 14:05:25,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:25,820 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2022-11-23 14:05:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-23 14:05:25,820 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 0 states have call successors, (0), 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 14:05:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:25,821 INFO L225 Difference]: With dead ends: 116 [2022-11-23 14:05:25,821 INFO L226 Difference]: Without dead ends: 116 [2022-11-23 14:05:25,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1200, Invalid=2106, Unknown=0, NotChecked=0, Total=3306 [2022-11-23 14:05:25,823 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:25,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 42 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:05:25,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-23 14:05:25,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-11-23 14:05:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.0803571428571428) internal successors, (121), 115 states have internal predecessors, (121), 0 states have call successors, (0), 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 14:05:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2022-11-23 14:05:25,828 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 54 [2022-11-23 14:05:25,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:25,828 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2022-11-23 14:05:25,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 0 states have call successors, (0), 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 14:05:25,829 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2022-11-23 14:05:25,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 14:05:25,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:25,830 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:05:25,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:05:26,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:26,042 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:05:26,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:26,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1795092765, now seen corresponding path program 2 times [2022-11-23 14:05:26,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:26,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460164435] [2022-11-23 14:05:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:26,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:05:28,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:28,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460164435] [2022-11-23 14:05:28,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460164435] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:28,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495244480] [2022-11-23 14:05:28,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:05:28,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:28,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:28,531 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:05:28,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:05:28,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-23 14:05:28,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:05:28,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:05:28,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:29,297 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~p~0#1.base| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~p~0#1.base|) 0) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~p~0#1.base| 0)))) is different from true [2022-11-23 14:05:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-11-23 14:05:29,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:05:29,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495244480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:29,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:05:29,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [48] total 50 [2022-11-23 14:05:29,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230601942] [2022-11-23 14:05:29,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:29,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:05:29,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:29,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:05:29,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1273, Unknown=1, NotChecked=96, Total=2550 [2022-11-23 14:05:29,306 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 14:05:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:29,380 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2022-11-23 14:05:29,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:05:29,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 102 [2022-11-23 14:05:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:29,382 INFO L225 Difference]: With dead ends: 115 [2022-11-23 14:05:29,382 INFO L226 Difference]: Without dead ends: 111 [2022-11-23 14:05:29,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1183, Invalid=1370, Unknown=1, NotChecked=98, Total=2652 [2022-11-23 14:05:29,384 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:29,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 11 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-11-23 14:05:29,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-23 14:05:29,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-11-23 14:05:29,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.0648148148148149) internal successors, (115), 110 states have internal predecessors, (115), 0 states have call successors, (0), 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 14:05:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-11-23 14:05:29,392 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 102 [2022-11-23 14:05:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:29,394 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-11-23 14:05:29,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 14:05:29,394 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-11-23 14:05:29,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 14:05:29,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:29,401 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 14:05:29,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 14:05:29,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:29,607 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:05:29,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:29,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1793758094, now seen corresponding path program 1 times [2022-11-23 14:05:29,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:29,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788623419] [2022-11-23 14:05:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:29,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:05:31,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:31,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788623419] [2022-11-23 14:05:31,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788623419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:31,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835831319] [2022-11-23 14:05:31,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:31,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:31,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:31,966 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:05:31,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:05:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:32,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 14:05:32,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:05:32,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:05:35,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835831319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:05:35,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1321291952] [2022-11-23 14:05:35,724 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:05:35,725 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:05:35,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:05:35,725 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:05:35,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:05:35,740 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 14:05:35,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:05:35,825 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 14:05:35,826 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 141 treesize of output 142 [2022-11-23 14:05:35,927 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 14:05:35,942 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 14:05:36,273 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:05:37,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3274#(and (< (select |#length| |ULTIMATE.start_main_~q~0#1.base|) (+ |ULTIMATE.start_main_~q~0#1.offset| 4)) (<= 1048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~q~0#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:05:37,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:05:37,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:05:37,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-23 14:05:37,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205523152] [2022-11-23 14:05:37,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:05:37,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-23 14:05:37,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:37,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-23 14:05:37,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4678, Invalid=6242, Unknown=0, NotChecked=0, Total=10920 [2022-11-23 14:05:37,386 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 0 states have call successors, (0), 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 14:05:37,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:37,801 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2022-11-23 14:05:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-23 14:05:37,802 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 0 states have call successors, (0), 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 102 [2022-11-23 14:05:37,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:37,803 INFO L225 Difference]: With dead ends: 207 [2022-11-23 14:05:37,803 INFO L226 Difference]: Without dead ends: 207 [2022-11-23 14:05:37,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4678, Invalid=6242, Unknown=0, NotChecked=0, Total=10920 [2022-11-23 14:05:37,806 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 141 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:37,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 45 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:05:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-23 14:05:37,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-11-23 14:05:37,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 204 states have (on average 1.0343137254901962) internal successors, (211), 206 states have internal predecessors, (211), 0 states have call successors, (0), 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 14:05:37,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 211 transitions. [2022-11-23 14:05:37,813 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 211 transitions. Word has length 102 [2022-11-23 14:05:37,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:37,813 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 211 transitions. [2022-11-23 14:05:37,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0309278350515463) internal successors, (197), 96 states have internal predecessors, (197), 0 states have call successors, (0), 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 14:05:37,814 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 211 transitions. [2022-11-23 14:05:37,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-23 14:05:37,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:37,816 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 14:05:37,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:05:38,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:38,023 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:05:38,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:38,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1199417038, now seen corresponding path program 2 times [2022-11-23 14:05:38,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:38,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253078389] [2022-11-23 14:05:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:38,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8839 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:05:45,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:45,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253078389] [2022-11-23 14:05:45,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253078389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:45,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818855816] [2022-11-23 14:05:45,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:05:45,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:45,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:45,184 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:05:45,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:05:45,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:05:45,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:05:45,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:05:45,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:45,380 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 14:05:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8839 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2022-11-23 14:05:46,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8839 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2022-11-23 14:05:48,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818855816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:05:48,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [379675234] [2022-11-23 14:05:48,043 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:05:48,043 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:05:48,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:05:48,044 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:05:48,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:05:48,056 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 14:05:48,073 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 14:05:48,111 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 151 treesize of output 141 [2022-11-23 14:05:48,163 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 14:05:48,180 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 14:05:48,541 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:05:50,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4987#(and (< (select |#length| |ULTIMATE.start_main_~q~0#1.base|) (+ |ULTIMATE.start_main_~q~0#1.offset| 4)) (<= 1048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~q~0#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:05:50,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:05:50,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:05:50,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 6, 6] total 108 [2022-11-23 14:05:50,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807746914] [2022-11-23 14:05:50,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:05:50,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-11-23 14:05:50,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:50,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-11-23 14:05:50,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4728, Invalid=8844, Unknown=0, NotChecked=0, Total=13572 [2022-11-23 14:05:50,034 INFO L87 Difference]: Start difference. First operand 207 states and 211 transitions. Second operand has 109 states, 109 states have (on average 2.018348623853211) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 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 14:05:59,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:59,884 INFO L93 Difference]: Finished difference Result 240 states and 253 transitions. [2022-11-23 14:05:59,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-23 14:05:59,884 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.018348623853211) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 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 198 [2022-11-23 14:05:59,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:59,886 INFO L225 Difference]: With dead ends: 240 [2022-11-23 14:05:59,886 INFO L226 Difference]: Without dead ends: 240 [2022-11-23 14:05:59,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7888 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=15582, Invalid=33480, Unknown=0, NotChecked=0, Total=49062 [2022-11-23 14:05:59,893 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 993 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:59,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [993 Valid, 85 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:05:59,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-23 14:05:59,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 224. [2022-11-23 14:05:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0448430493273542) internal successors, (233), 223 states have internal predecessors, (233), 0 states have call successors, (0), 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 14:05:59,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 233 transitions. [2022-11-23 14:05:59,899 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 233 transitions. Word has length 198 [2022-11-23 14:05:59,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:59,899 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 233 transitions. [2022-11-23 14:05:59,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.018348623853211) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 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 14:05:59,900 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 233 transitions. [2022-11-23 14:05:59,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-23 14:05:59,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:59,902 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 5, 4, 4, 3, 2, 1, 1, 1, 1] [2022-11-23 14:05:59,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:00,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:00,108 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:06:00,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:00,108 INFO L85 PathProgramCache]: Analyzing trace with hash 93972914, now seen corresponding path program 1 times [2022-11-23 14:06:00,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:00,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955420265] [2022-11-23 14:06:00,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:00,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9058 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 9037 trivial. 0 not checked. [2022-11-23 14:06:00,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:00,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955420265] [2022-11-23 14:06:00,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955420265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:00,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:00,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:06:00,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263860514] [2022-11-23 14:06:00,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:00,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:00,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:00,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:00,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:00,300 INFO L87 Difference]: Start difference. First operand 224 states and 233 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:00,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:00,313 INFO L93 Difference]: Finished difference Result 227 states and 233 transitions. [2022-11-23 14:06:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:00,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2022-11-23 14:06:00,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:00,315 INFO L225 Difference]: With dead ends: 227 [2022-11-23 14:06:00,315 INFO L226 Difference]: Without dead ends: 224 [2022-11-23 14:06:00,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:00,317 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:00,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:06:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-23 14:06:00,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-11-23 14:06:00,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0269058295964126) internal successors, (229), 223 states have internal predecessors, (229), 0 states have call successors, (0), 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 14:06:00,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 229 transitions. [2022-11-23 14:06:00,323 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 229 transitions. Word has length 212 [2022-11-23 14:06:00,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:00,324 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 229 transitions. [2022-11-23 14:06:00,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:00,324 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 229 transitions. [2022-11-23 14:06:00,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-23 14:06:00,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:00,327 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 5, 5, 4, 4, 4, 1, 1, 1] [2022-11-23 14:06:00,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:06:00,327 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:06:00,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:00,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1124062715, now seen corresponding path program 3 times [2022-11-23 14:06:00,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:00,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532213609] [2022-11-23 14:06:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:00,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9067 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 14:06:07,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:07,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532213609] [2022-11-23 14:06:07,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532213609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:06:07,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354268394] [2022-11-23 14:06:07,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:06:07,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:07,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:07,205 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:07,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:08:01,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:08:01,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:08:01,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 1339 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-23 14:08:01,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9067 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 14:08:01,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:08:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9067 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 14:08:13,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354268394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:08:13,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1642257736] [2022-11-23 14:08:13,199 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:08:13,199 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:08:13,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:08:13,200 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:08:13,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:08:13,219 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 14:08:13,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:08:13,283 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 14:08:13,284 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 141 treesize of output 142 [2022-11-23 14:08:13,351 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 14:08:13,367 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 14:08:13,675 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:08:15,069 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7602#(and (< (select |#length| |ULTIMATE.start_main_~q~0#1.base|) (+ |ULTIMATE.start_main_~q~0#1.offset| 4)) (<= 1048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~q~0#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:08:15,069 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:08:15,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:08:15,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 194 [2022-11-23 14:08:15,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127313185] [2022-11-23 14:08:15,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:08:15,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2022-11-23 14:08:15,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:08:15,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2022-11-23 14:08:15,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18937, Invalid=22069, Unknown=0, NotChecked=0, Total=41006 [2022-11-23 14:08:15,081 INFO L87 Difference]: Start difference. First operand 224 states and 229 transitions. Second operand has 195 states, 195 states have (on average 2.0153846153846153) internal successors, (393), 194 states have internal predecessors, (393), 0 states have call successors, (0), 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 14:08:16,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:16,100 INFO L93 Difference]: Finished difference Result 418 states and 423 transitions. [2022-11-23 14:08:16,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2022-11-23 14:08:16,101 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 2.0153846153846153) internal successors, (393), 194 states have internal predecessors, (393), 0 states have call successors, (0), 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 215 [2022-11-23 14:08:16,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:16,102 INFO L225 Difference]: With dead ends: 418 [2022-11-23 14:08:16,102 INFO L226 Difference]: Without dead ends: 418 [2022-11-23 14:08:16,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=18937, Invalid=22069, Unknown=0, NotChecked=0, Total=41006 [2022-11-23 14:08:16,107 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 288 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:16,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 36 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:08:16,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-11-23 14:08:16,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2022-11-23 14:08:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.014388489208633) internal successors, (423), 417 states have internal predecessors, (423), 0 states have call successors, (0), 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 14:08:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 423 transitions. [2022-11-23 14:08:16,115 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 423 transitions. Word has length 215 [2022-11-23 14:08:16,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:16,116 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 423 transitions. [2022-11-23 14:08:16,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 2.0153846153846153) internal successors, (393), 194 states have internal predecessors, (393), 0 states have call successors, (0), 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 14:08:16,116 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 423 transitions. [2022-11-23 14:08:16,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2022-11-23 14:08:16,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:16,124 INFO L195 NwaCegarLoop]: trace histogram [192, 192, 5, 5, 4, 4, 4, 1, 1, 1] [2022-11-23 14:08:16,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:16,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:08:16,339 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:08:16,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:16,340 INFO L85 PathProgramCache]: Analyzing trace with hash -324945097, now seen corresponding path program 4 times [2022-11-23 14:08:16,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:08:16,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198971996] [2022-11-23 14:08:16,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:16,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:08:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 36906 backedges. 0 proven. 36864 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 14:08:42,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:08:42,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198971996] [2022-11-23 14:08:42,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198971996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:08:42,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345700522] [2022-11-23 14:08:42,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:08:42,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:08:42,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:08:42,037 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:08:42,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:08:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:42,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 2600 conjuncts, 194 conjunts are in the unsatisfiable core [2022-11-23 14:08:42,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36906 backedges. 0 proven. 36864 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 14:08:43,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 36906 backedges. 0 proven. 36864 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 14:09:28,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345700522] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:28,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [179630577] [2022-11-23 14:09:28,412 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:09:28,412 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:28,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:28,413 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:28,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:28,426 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 14:09:28,451 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 14:09:28,493 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 151 treesize of output 141 [2022-11-23 14:09:28,545 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 14:09:28,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:09:28,879 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:09:31,097 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11283#(and (< (select |#length| |ULTIMATE.start_main_~q~0#1.base|) (+ |ULTIMATE.start_main_~q~0#1.offset| 4)) (<= 1048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~q~0#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:09:31,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:09:31,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:09:31,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194, 194] total 388 [2022-11-23 14:09:31,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337262734] [2022-11-23 14:09:31,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:31,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 389 states [2022-11-23 14:09:31,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:31,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 389 interpolants. [2022-11-23 14:09:31,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75488, Invalid=81724, Unknown=0, NotChecked=0, Total=157212 [2022-11-23 14:09:31,122 INFO L87 Difference]: Start difference. First operand 418 states and 423 transitions. Second operand has 389 states, 389 states have (on average 2.007712082262211) internal successors, (781), 388 states have internal predecessors, (781), 0 states have call successors, (0), 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 14:09:36,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:36,297 INFO L93 Difference]: Finished difference Result 806 states and 811 transitions. [2022-11-23 14:09:36,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 388 states. [2022-11-23 14:09:36,298 INFO L78 Accepts]: Start accepts. Automaton has has 389 states, 389 states have (on average 2.007712082262211) internal successors, (781), 388 states have internal predecessors, (781), 0 states have call successors, (0), 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 409 [2022-11-23 14:09:36,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:36,301 INFO L225 Difference]: With dead ends: 806 [2022-11-23 14:09:36,302 INFO L226 Difference]: Without dead ends: 806 [2022-11-23 14:09:36,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1419 GetRequests, 1024 SyntacticMatches, 0 SemanticMatches, 395 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5406 ImplicationChecksByTransitivity, 61.4s TimeCoverageRelationStatistics Valid=75488, Invalid=81724, Unknown=0, NotChecked=0, Total=157212 [2022-11-23 14:09:36,312 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 579 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:36,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 48 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 14:09:36,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-11-23 14:09:36,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 806. [2022-11-23 14:09:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 1.0074534161490682) internal successors, (811), 805 states have internal predecessors, (811), 0 states have call successors, (0), 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 14:09:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 811 transitions. [2022-11-23 14:09:36,326 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 811 transitions. Word has length 409 [2022-11-23 14:09:36,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:36,327 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 811 transitions. [2022-11-23 14:09:36,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 389 states, 389 states have (on average 2.007712082262211) internal successors, (781), 388 states have internal predecessors, (781), 0 states have call successors, (0), 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 14:09:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 811 transitions. [2022-11-23 14:09:36,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2022-11-23 14:09:36,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:36,353 INFO L195 NwaCegarLoop]: trace histogram [386, 386, 5, 5, 4, 4, 4, 1, 1, 1] [2022-11-23 14:09:36,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:36,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 14:09:36,562 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:09:36,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:36,563 INFO L85 PathProgramCache]: Analyzing trace with hash 617957551, now seen corresponding path program 5 times [2022-11-23 14:09:36,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:36,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264358944] [2022-11-23 14:09:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:36,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 149038 backedges. 0 proven. 148996 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 14:11:27,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:27,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264358944] [2022-11-23 14:11:27,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264358944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:27,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053299653] [2022-11-23 14:11:27,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:11:27,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:27,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:27,707 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:27,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:11:28,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 14:11:28,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:11:28,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:11:28,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:28,235 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 14:11:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 149038 backedges. 771 proven. 42 refuted. 0 times theorem prover too weak. 148225 trivial. 0 not checked. [2022-11-23 14:11:34,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 149038 backedges. 0 proven. 1198 refuted. 0 times theorem prover too weak. 147840 trivial. 0 not checked. [2022-11-23 14:11:41,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053299653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:41,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [220761104] [2022-11-23 14:11:41,891 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:11:41,891 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:11:41,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:11:41,892 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:11:41,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:11:41,908 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 14:11:41,941 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 14:11:41,976 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 151 treesize of output 141 [2022-11-23 14:11:42,017 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 14:11:42,032 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 14:11:42,309 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:11:46,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18092#(and (< (select |#length| |ULTIMATE.start_main_~q~0#1.base|) (+ |ULTIMATE.start_main_~q~0#1.offset| 4)) (<= 1048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~q~0#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:11:46,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:11:46,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:11:46,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [388, 11, 13] total 412 [2022-11-23 14:11:46,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311605553] [2022-11-23 14:11:46,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:11:46,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 413 states [2022-11-23 14:11:46,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:46,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 413 interpolants. [2022-11-23 14:11:46,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76816, Invalid=100004, Unknown=0, NotChecked=0, Total=176820 [2022-11-23 14:11:46,440 INFO L87 Difference]: Start difference. First operand 806 states and 811 transitions. Second operand has 413 states, 413 states have (on average 2.0314769975786926) internal successors, (839), 412 states have internal predecessors, (839), 0 states have call successors, (0), 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 14:14:11,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:14:11,727 INFO L93 Difference]: Finished difference Result 879 states and 891 transitions. [2022-11-23 14:14:11,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 416 states. [2022-11-23 14:14:11,728 INFO L78 Accepts]: Start accepts. Automaton has has 413 states, 413 states have (on average 2.0314769975786926) internal successors, (839), 412 states have internal predecessors, (839), 0 states have call successors, (0), 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 797 [2022-11-23 14:14:11,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:14:11,732 INFO L225 Difference]: With dead ends: 879 [2022-11-23 14:14:11,732 INFO L226 Difference]: Without dead ends: 879 [2022-11-23 14:14:11,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3190 GetRequests, 2358 SyntacticMatches, 0 SemanticMatches, 832 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98128 ImplicationChecksByTransitivity, 207.4s TimeCoverageRelationStatistics Valid=242366, Invalid=452356, Unknown=0, NotChecked=0, Total=694722 [2022-11-23 14:14:11,777 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7956 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7956 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:14:11,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7956 Valid, 70 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 14:14:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-11-23 14:14:11,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 852. [2022-11-23 14:14:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 1.0141010575793183) internal successors, (863), 851 states have internal predecessors, (863), 0 states have call successors, (0), 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 14:14:11,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 863 transitions. [2022-11-23 14:14:11,793 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 863 transitions. Word has length 797 [2022-11-23 14:14:11,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:14:11,794 INFO L495 AbstractCegarLoop]: Abstraction has 852 states and 863 transitions. [2022-11-23 14:14:11,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 413 states, 413 states have (on average 2.0314769975786926) internal successors, (839), 412 states have internal predecessors, (839), 0 states have call successors, (0), 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 14:14:11,795 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 863 transitions. [2022-11-23 14:14:11,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2022-11-23 14:14:11,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:14:11,802 INFO L195 NwaCegarLoop]: trace histogram [388, 388, 11, 11, 10, 10, 10, 1, 1, 1] [2022-11-23 14:14:11,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:14:12,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 14:14:12,008 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:14:12,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:14:12,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2049624377, now seen corresponding path program 6 times [2022-11-23 14:14:12,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:14:12,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966268377] [2022-11-23 14:14:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:14:12,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:14:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:16:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 150799 backedges. 0 proven. 150544 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-11-23 14:16:04,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:16:04,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966268377] [2022-11-23 14:16:04,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966268377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:16:04,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174988865] [2022-11-23 14:16:04,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:16:04,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:16:04,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:16:04,955 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:16:04,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bddf236-c788-4a7a-a09f-7a6abc706306/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process