./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers4-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba --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 32bit --witnessprinter.graph.data.programhash 6bc6b4117baccd9c0c047fce306a2f95fb55fa90595dfb64eaa429319b56a306 --- 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-b5237d8 [2022-11-22 00:18:15,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:18:15,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:18:15,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:18:15,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:18:15,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:18:15,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:18:15,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:18:15,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:18:15,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:18:15,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:18:15,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:18:15,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:18:15,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:18:15,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:18:15,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:18:15,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:18:15,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:18:15,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:18:15,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:18:15,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:18:15,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:18:15,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:18:15,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:18:15,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:18:15,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:18:15,622 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:18:15,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:18:15,624 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:18:15,625 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:18:15,626 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:18:15,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:18:15,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:18:15,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:18:15,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:18:15,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:18:15,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:18:15,632 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:18:15,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:18:15,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:18:15,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:18:15,636 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 00:18:15,664 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:18:15,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:18:15,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:18:15,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:18:15,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:18:15,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:18:15,667 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:18:15,668 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:18:15,668 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:18:15,668 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:18:15,669 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:18:15,669 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:18:15,669 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:18:15,670 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:18:15,670 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:18:15,670 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:18:15,671 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:18:15,671 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:18:15,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 00:18:15,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 00:18:15,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:18:15,673 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:18:15,673 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 00:18:15,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:18:15,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:18:15,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:18:15,675 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 00:18:15,675 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 00:18:15,675 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 00:18:15,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:18:15,676 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 00:18:15,676 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:18:15,677 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:18:15,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:18:15,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:18:15,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:18:15,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:18:15,678 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:18:15,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:18:15,679 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:18:15,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:18:15,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:18:15,680 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_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6bc6b4117baccd9c0c047fce306a2f95fb55fa90595dfb64eaa429319b56a306 [2022-11-22 00:18:16,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:18:16,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:18:16,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:18:16,056 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:18:16,056 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:18:16,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/memsafety-ext3/getNumbers4-1.c [2022-11-22 00:18:19,470 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:18:19,720 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:18:19,721 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/sv-benchmarks/c/memsafety-ext3/getNumbers4-1.c [2022-11-22 00:18:19,729 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/data/507ce3417/ac67975ac31d477d81e17a9d8e7e00be/FLAG64f594796 [2022-11-22 00:18:19,747 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/data/507ce3417/ac67975ac31d477d81e17a9d8e7e00be [2022-11-22 00:18:19,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:18:19,753 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:18:19,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:18:19,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:18:19,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:18:19,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:18:19" (1/1) ... [2022-11-22 00:18:19,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fddab25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:19, skipping insertion in model container [2022-11-22 00:18:19,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:18:19" (1/1) ... [2022-11-22 00:18:19,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:18:19,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:18:20,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:18:20,082 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:18:20,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:18:20,125 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:18:20,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:20 WrapperNode [2022-11-22 00:18:20,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:18:20,127 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:18:20,128 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:18:20,128 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:18:20,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:20" (1/1) ... [2022-11-22 00:18:20,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:20" (1/1) ... [2022-11-22 00:18:20,206 INFO L138 Inliner]: procedures = 12, calls = 18, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 92 [2022-11-22 00:18:20,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:18:20,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:18:20,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:18:20,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:18:20,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:20" (1/1) ... [2022-11-22 00:18:20,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:20" (1/1) ... [2022-11-22 00:18:20,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:20" (1/1) ... [2022-11-22 00:18:20,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:20" (1/1) ... [2022-11-22 00:18:20,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:20" (1/1) ... [2022-11-22 00:18:20,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:20" (1/1) ... [2022-11-22 00:18:20,257 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:20" (1/1) ... [2022-11-22 00:18:20,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:20" (1/1) ... [2022-11-22 00:18:20,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:18:20,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:18:20,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:18:20,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:18:20,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:20" (1/1) ... [2022-11-22 00:18:20,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:18:20,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:20,321 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:18:20,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:18:20,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 00:18:20,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:18:20,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:18:20,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:18:20,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 00:18:20,568 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:18:20,571 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:18:20,977 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:18:21,053 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:18:21,054 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-22 00:18:21,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:18:21 BoogieIcfgContainer [2022-11-22 00:18:21,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:18:21,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:18:21,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:18:21,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:18:21,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:18:19" (1/3) ... [2022-11-22 00:18:21,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a88964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:18:21, skipping insertion in model container [2022-11-22 00:18:21,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:18:20" (2/3) ... [2022-11-22 00:18:21,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a88964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:18:21, skipping insertion in model container [2022-11-22 00:18:21,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:18:21" (3/3) ... [2022-11-22 00:18:21,070 INFO L112 eAbstractionObserver]: Analyzing ICFG getNumbers4-1.c [2022-11-22 00:18:21,095 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:18:21,095 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2022-11-22 00:18:21,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:18:21,169 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;@571a55d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:18:21,169 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-11-22 00:18:21,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 15 states have (on average 2.466666666666667) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:21,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 00:18:21,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:21,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 00:18:21,184 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:21,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:21,194 INFO L85 PathProgramCache]: Analyzing trace with hash 143511, now seen corresponding path program 1 times [2022-11-22 00:18:21,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:21,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541787591] [2022-11-22 00:18:21,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:21,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:21,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:21,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:21,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541787591] [2022-11-22 00:18:21,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541787591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:21,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:21,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 00:18:21,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731191021] [2022-11-22 00:18:21,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:21,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:18:21,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:21,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:18:21,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:18:21,619 INFO L87 Difference]: Start difference. First operand has 33 states, 15 states have (on average 2.466666666666667) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2022-11-22 00:18:21,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:21,731 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-11-22 00:18:21,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:18:21,736 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 [2022-11-22 00:18:21,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:21,746 INFO L225 Difference]: With dead ends: 32 [2022-11-22 00:18:21,746 INFO L226 Difference]: Without dead ends: 31 [2022-11-22 00:18:21,749 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 [2022-11-22 00:18:21,760 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:21,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 12 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:21,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-22 00:18:21,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-22 00:18:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-22 00:18:21,803 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 3 [2022-11-22 00:18:21,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:21,804 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-22 00:18:21,804 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) [2022-11-22 00:18:21,804 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-22 00:18:21,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 00:18:21,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:21,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 00:18:21,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:18:21,806 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:21,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:21,807 INFO L85 PathProgramCache]: Analyzing trace with hash 143512, now seen corresponding path program 1 times [2022-11-22 00:18:21,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:21,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264894137] [2022-11-22 00:18:21,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:21,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:21,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:21,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264894137] [2022-11-22 00:18:21,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264894137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:21,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:21,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 00:18:21,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495905979] [2022-11-22 00:18:21,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:21,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:18:21,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:21,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:18:21,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:18:21,957 INFO L87 Difference]: Start difference. First operand 31 states and 35 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) [2022-11-22 00:18:22,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:22,020 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-11-22 00:18:22,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:18:22,021 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 [2022-11-22 00:18:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:22,022 INFO L225 Difference]: With dead ends: 33 [2022-11-22 00:18:22,023 INFO L226 Difference]: Without dead ends: 33 [2022-11-22 00:18:22,023 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 [2022-11-22 00:18:22,025 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:22,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:22,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-22 00:18:22,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-22 00:18:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 2.176470588235294) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-22 00:18:22,037 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 3 [2022-11-22 00:18:22,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:22,038 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-22 00:18:22,039 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) [2022-11-22 00:18:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-22 00:18:22,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 00:18:22,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:22,043 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-22 00:18:22,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:18:22,044 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:22,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:22,046 INFO L85 PathProgramCache]: Analyzing trace with hash 138020104, now seen corresponding path program 1 times [2022-11-22 00:18:22,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:22,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529514281] [2022-11-22 00:18:22,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:22,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:22,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:22,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529514281] [2022-11-22 00:18:22,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529514281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:22,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:22,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:18:22,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612211854] [2022-11-22 00:18:22,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:22,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:18:22,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:22,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:18:22,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:18:22,334 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:22,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:22,423 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-11-22 00:18:22,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:18:22,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 00:18:22,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:22,425 INFO L225 Difference]: With dead ends: 32 [2022-11-22 00:18:22,425 INFO L226 Difference]: Without dead ends: 32 [2022-11-22 00:18:22,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:18:22,427 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:22,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 24 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:22,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-22 00:18:22,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-11-22 00:18:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 2.1875) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-22 00:18:22,433 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2022-11-22 00:18:22,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:22,433 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-22 00:18:22,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-22 00:18:22,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 00:18:22,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:22,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 00:18:22,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 00:18:22,436 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:22,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:22,437 INFO L85 PathProgramCache]: Analyzing trace with hash -16225341, now seen corresponding path program 1 times [2022-11-22 00:18:22,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:22,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547125531] [2022-11-22 00:18:22,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:22,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:22,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:22,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547125531] [2022-11-22 00:18:22,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547125531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:22,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893462886] [2022-11-22 00:18:22,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:22,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:22,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:22,560 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:22,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:18:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:22,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:18:22,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:22,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:18:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:22,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893462886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:18:22,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2075402495] [2022-11-22 00:18:22,757 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-22 00:18:22,758 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:18:22,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:18:22,770 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:18:22,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:18:22,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 25 [2022-11-22 00:18:22,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 40 [2022-11-22 00:18:23,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 244 [2022-11-22 00:18:23,479 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 18 treesize of output 14 [2022-11-22 00:18:23,505 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:18:23,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '275#(and (= |ULTIMATE.start_getNumbers2_~i~1#1| 0) (= |ULTIMATE.start_getNumbers_#res#1.base| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= 4 |~#numbers4~0.base|) (= |~#numbers3~0.offset| 0) (= |~#numbers2~0.base| 2) (= 3 |~#numbers3~0.base|) (= |ULTIMATE.start_getNumbers_#res#1.offset| |~#array~0.offset|) (= |ULTIMATE.start_getNumbers_#res#1.base| |~#array~0.base|) (= |~#array~0.offset| 0) (= |~#array~0.base| 1) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (not (<= (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|))) (= |~#numbers2~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_getNumbers_#res#1.offset| |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 00:18:23,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:18:23,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:18:23,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-22 00:18:23,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145495505] [2022-11-22 00:18:23,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:18:23,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:18:23,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:23,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:18:23,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-22 00:18:23,774 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:23,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:23,832 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-22 00:18:23,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:18:23,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 00:18:23,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:23,834 INFO L225 Difference]: With dead ends: 37 [2022-11-22 00:18:23,834 INFO L226 Difference]: Without dead ends: 37 [2022-11-22 00:18:23,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-22 00:18:23,836 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:23,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 66 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:18:23,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-22 00:18:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-22 00:18:23,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-11-22 00:18:23,842 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 6 [2022-11-22 00:18:23,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:23,842 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-11-22 00:18:23,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:23,842 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-11-22 00:18:23,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 00:18:23,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:23,844 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1] [2022-11-22 00:18:23,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:18:24,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:24,056 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:24,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:24,056 INFO L85 PathProgramCache]: Analyzing trace with hash -465321869, now seen corresponding path program 2 times [2022-11-22 00:18:24,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:24,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918826194] [2022-11-22 00:18:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:24,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 00:18:24,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:24,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918826194] [2022-11-22 00:18:24,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918826194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:24,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:24,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:18:24,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966512378] [2022-11-22 00:18:24,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:24,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:18:24,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:24,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:18:24,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:18:24,363 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:24,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:24,458 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-11-22 00:18:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:18:24,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 00:18:24,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:24,461 INFO L225 Difference]: With dead ends: 43 [2022-11-22 00:18:24,461 INFO L226 Difference]: Without dead ends: 43 [2022-11-22 00:18:24,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:18:24,464 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:24,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 22 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:24,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-22 00:18:24,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2022-11-22 00:18:24,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 38 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) [2022-11-22 00:18:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-22 00:18:24,478 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 12 [2022-11-22 00:18:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:24,479 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-22 00:18:24,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-22 00:18:24,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 00:18:24,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:24,480 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1] [2022-11-22 00:18:24,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 00:18:24,481 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:24,482 INFO L85 PathProgramCache]: Analyzing trace with hash -465321870, now seen corresponding path program 1 times [2022-11-22 00:18:24,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:24,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509954991] [2022-11-22 00:18:24,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:24,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:18:24,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:24,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509954991] [2022-11-22 00:18:24,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509954991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:24,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:24,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:18:24,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540193960] [2022-11-22 00:18:24,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:24,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:18:24,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:24,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:18:24,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:18:24,600 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:24,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:24,662 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-11-22 00:18:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:18:24,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 00:18:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:24,665 INFO L225 Difference]: With dead ends: 38 [2022-11-22 00:18:24,666 INFO L226 Difference]: Without dead ends: 38 [2022-11-22 00:18:24,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:18:24,669 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:24,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 12 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:18:24,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-22 00:18:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-22 00:18:24,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.75) internal successors, (42), 37 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) [2022-11-22 00:18:24,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-11-22 00:18:24,682 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 12 [2022-11-22 00:18:24,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:24,682 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-11-22 00:18:24,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:24,684 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-11-22 00:18:24,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 00:18:24,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:24,685 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-22 00:18:24,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 00:18:24,686 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:24,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:24,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1540076079, now seen corresponding path program 1 times [2022-11-22 00:18:24,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:24,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582583750] [2022-11-22 00:18:24,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:24,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 00:18:24,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:24,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582583750] [2022-11-22 00:18:24,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582583750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:24,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:24,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 00:18:24,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401679103] [2022-11-22 00:18:24,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:24,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:18:24,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:24,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:18:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:18:24,789 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:24,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:24,829 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-22 00:18:24,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:18:24,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 00:18:24,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:24,834 INFO L225 Difference]: With dead ends: 37 [2022-11-22 00:18:24,834 INFO L226 Difference]: Without dead ends: 37 [2022-11-22 00:18:24,835 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 [2022-11-22 00:18:24,836 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:24,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 11 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:18:24,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-22 00:18:24,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-22 00:18:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-11-22 00:18:24,851 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 13 [2022-11-22 00:18:24,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:24,852 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-11-22 00:18:24,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:24,857 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-11-22 00:18:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 00:18:24,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:24,858 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-22 00:18:24,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 00:18:24,859 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:24,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:24,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1540076078, now seen corresponding path program 1 times [2022-11-22 00:18:24,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:24,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878823484] [2022-11-22 00:18:24,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:24,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:24,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:24,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878823484] [2022-11-22 00:18:24,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878823484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:24,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067585042] [2022-11-22 00:18:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:24,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:24,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:24,962 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:24,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:18:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:25,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:18:25,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:25,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:18:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:25,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067585042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:18:25,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [819719924] [2022-11-22 00:18:25,172 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 00:18:25,173 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:18:25,173 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:18:25,173 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:18:25,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:18:25,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 25 [2022-11-22 00:18:25,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 40 [2022-11-22 00:18:25,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:25,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:25,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:25,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:25,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:25,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:25,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 244 [2022-11-22 00:18:25,547 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 18 treesize of output 14 [2022-11-22 00:18:25,574 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:18:25,985 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '684#(and (= (select |#valid| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) 1) (= |ULTIMATE.start_getNumbers2_~i~1#1| 0) (<= (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|)) (= |ULTIMATE.start_getNumbers_#res#1.base| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= 4 |~#numbers4~0.base|) (= |~#numbers3~0.offset| 0) (= |~#numbers2~0.base| 2) (= 3 |~#numbers3~0.base|) (= |ULTIMATE.start_getNumbers_#res#1.offset| |~#array~0.offset|) (= |ULTIMATE.start_getNumbers_#res#1.base| |~#array~0.base|) (= (select (select |#memory_int| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|)) |ULTIMATE.start_getNumbers2_#t~mem3#1|) (= |~#array~0.offset| 0) (not (<= (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) 4 |~#numbers2~0.offset|) (select |#length| |~#numbers2~0.base|))) (= |~#array~0.base| 1) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (= |~#numbers2~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_getNumbers_#res#1.offset| |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 00:18:25,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:18:25,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:18:25,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-22 00:18:25,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614103999] [2022-11-22 00:18:25,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:18:25,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 00:18:25,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:25,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 00:18:25,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-11-22 00:18:25,987 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:26,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:26,080 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-11-22 00:18:26,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 00:18:26,081 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 00:18:26,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:26,081 INFO L225 Difference]: With dead ends: 49 [2022-11-22 00:18:26,082 INFO L226 Difference]: Without dead ends: 49 [2022-11-22 00:18:26,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-11-22 00:18:26,083 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:26,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:26,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-22 00:18:26,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-22 00:18:26,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:26,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-11-22 00:18:26,087 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 13 [2022-11-22 00:18:26,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:26,087 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-11-22 00:18:26,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:26,088 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-11-22 00:18:26,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 00:18:26,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:26,089 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2022-11-22 00:18:26,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:18:26,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:26,296 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:26,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:26,297 INFO L85 PathProgramCache]: Analyzing trace with hash -2056709006, now seen corresponding path program 2 times [2022-11-22 00:18:26,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:26,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823661872] [2022-11-22 00:18:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:26,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-22 00:18:26,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:26,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823661872] [2022-11-22 00:18:26,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823661872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:26,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:26,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:18:26,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918548745] [2022-11-22 00:18:26,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:26,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:18:26,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:26,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:18:26,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:18:26,547 INFO L87 Difference]: Start difference. First operand 49 states and 53 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) [2022-11-22 00:18:26,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:26,602 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-11-22 00:18:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:18:26,603 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 25 [2022-11-22 00:18:26,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:26,605 INFO L225 Difference]: With dead ends: 50 [2022-11-22 00:18:26,605 INFO L226 Difference]: Without dead ends: 50 [2022-11-22 00:18:26,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:18:26,608 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:26,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 20 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:26,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-22 00:18:26,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-22 00:18:26,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:26,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-11-22 00:18:26,616 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 25 [2022-11-22 00:18:26,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:26,617 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-11-22 00:18:26,617 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) [2022-11-22 00:18:26,617 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-11-22 00:18:26,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 00:18:26,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:26,619 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1] [2022-11-22 00:18:26,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 00:18:26,622 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:26,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:26,622 INFO L85 PathProgramCache]: Analyzing trace with hash -812313107, now seen corresponding path program 1 times [2022-11-22 00:18:26,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:26,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144552225] [2022-11-22 00:18:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:26,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-22 00:18:26,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:26,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144552225] [2022-11-22 00:18:26,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144552225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:26,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601784666] [2022-11-22 00:18:26,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:26,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:26,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:26,952 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:26,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:18:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:27,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 00:18:27,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-22 00:18:27,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:18:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-22 00:18:27,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601784666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:18:27,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1386170896] [2022-11-22 00:18:27,543 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 00:18:27,543 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:18:27,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:18:27,544 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:18:27,544 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:18:27,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 25 [2022-11-22 00:18:27,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 40 [2022-11-22 00:18:27,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:27,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:27,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:27,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:27,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:27,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:27,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 244 [2022-11-22 00:18:27,848 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 18 treesize of output 14 [2022-11-22 00:18:27,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:27,893 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 15 treesize of output 15 [2022-11-22 00:18:28,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:28,028 INFO L321 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2022-11-22 00:18:28,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 144 treesize of output 155 [2022-11-22 00:18:28,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:28,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:28,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:28,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:28,282 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:18:29,759 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1058#(and (<= 0 |ULTIMATE.start_getNumbers2_~i~1#1|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= 4 |~#numbers4~0.base|) (= |~#numbers3~0.offset| 0) (= |~#numbers2~0.base| 2) (= 3 |~#numbers3~0.base|) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (= |~#array~0.base| 1) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (not (<= (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|))) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:18:29,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:18:29,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:18:29,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-22 00:18:29,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170871733] [2022-11-22 00:18:29,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:18:29,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 00:18:29,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:29,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 00:18:29,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-22 00:18:29,762 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:30,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:30,117 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2022-11-22 00:18:30,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:18:30,118 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-22 00:18:30,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:30,119 INFO L225 Difference]: With dead ends: 100 [2022-11-22 00:18:30,119 INFO L226 Difference]: Without dead ends: 100 [2022-11-22 00:18:30,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-11-22 00:18:30,120 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 257 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:30,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 66 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:18:30,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-22 00:18:30,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 58. [2022-11-22 00:18:30,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 57 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) [2022-11-22 00:18:30,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-11-22 00:18:30,124 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 27 [2022-11-22 00:18:30,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:30,125 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-11-22 00:18:30,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-11-22 00:18:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 00:18:30,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:30,126 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1] [2022-11-22 00:18:30,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:18:30,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 00:18:30,327 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:30,328 INFO L85 PathProgramCache]: Analyzing trace with hash 588097432, now seen corresponding path program 1 times [2022-11-22 00:18:30,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:30,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422022684] [2022-11-22 00:18:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:30,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-22 00:18:30,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:30,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422022684] [2022-11-22 00:18:30,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422022684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:30,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234859007] [2022-11-22 00:18:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:30,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:30,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:30,596 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:30,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:18:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:30,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 00:18:30,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-22 00:18:31,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:18:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-22 00:18:31,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234859007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:18:31,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1010399781] [2022-11-22 00:18:31,248 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 00:18:31,249 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:18:31,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:18:31,249 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:18:31,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:18:31,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 25 [2022-11-22 00:18:31,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 40 [2022-11-22 00:18:31,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:31,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:31,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:31,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:31,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:31,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:31,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 244 [2022-11-22 00:18:31,488 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 18 treesize of output 14 [2022-11-22 00:18:31,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:31,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:31,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:31,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 159 [2022-11-22 00:18:31,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:31,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:31,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:31,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:31,934 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:18:32,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1403#(and (= (select |#valid| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) 1) (<= (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|)) (<= 0 |ULTIMATE.start_getNumbers2_~i~1#1|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= 4 |~#numbers4~0.base|) (= |~#numbers3~0.offset| 0) (= |~#numbers2~0.base| 2) (= 3 |~#numbers3~0.base|) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|)) |ULTIMATE.start_getNumbers2_#t~mem3#1|) (= |~#array~0.offset| 0) (not (<= (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) 4 |~#numbers2~0.offset|) (select |#length| |~#numbers2~0.base|))) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (= |~#array~0.base| 1) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:18:32,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:18:32,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:18:32,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-22 00:18:32,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311375671] [2022-11-22 00:18:32,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:18:32,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 00:18:32,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 00:18:32,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-22 00:18:32,863 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:33,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:33,170 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2022-11-22 00:18:33,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:18:33,170 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-22 00:18:33,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:33,171 INFO L225 Difference]: With dead ends: 59 [2022-11-22 00:18:33,171 INFO L226 Difference]: Without dead ends: 59 [2022-11-22 00:18:33,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-11-22 00:18:33,172 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 82 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:33,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 30 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:33,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-22 00:18:33,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-22 00:18:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:33,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-11-22 00:18:33,176 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 28 [2022-11-22 00:18:33,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:33,177 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-11-22 00:18:33,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:33,177 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-11-22 00:18:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 00:18:33,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:33,178 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 4, 4, 1, 1, 1] [2022-11-22 00:18:33,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:18:33,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 00:18:33,379 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:33,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:33,379 INFO L85 PathProgramCache]: Analyzing trace with hash 900198739, now seen corresponding path program 2 times [2022-11-22 00:18:33,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:33,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266846399] [2022-11-22 00:18:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:33,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-22 00:18:33,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:33,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266846399] [2022-11-22 00:18:33,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266846399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:33,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647074739] [2022-11-22 00:18:33,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:18:33,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:33,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:33,944 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:33,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:18:34,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 00:18:34,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:18:34,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 00:18:34,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-22 00:18:34,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:18:34,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647074739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:34,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:18:34,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2022-11-22 00:18:34,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771530510] [2022-11-22 00:18:34,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:34,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:18:34,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:34,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:18:34,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-22 00:18:34,414 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-22 00:18:34,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:34,552 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-11-22 00:18:34,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:18:34,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 36 [2022-11-22 00:18:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:34,554 INFO L225 Difference]: With dead ends: 58 [2022-11-22 00:18:34,554 INFO L226 Difference]: Without dead ends: 58 [2022-11-22 00:18:34,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-22 00:18:34,556 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:34,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:34,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-22 00:18:34,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-22 00:18:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:34,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-11-22 00:18:34,560 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 36 [2022-11-22 00:18:34,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:34,560 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-11-22 00:18:34,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-22 00:18:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-11-22 00:18:34,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 00:18:34,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:34,562 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-22 00:18:34,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-22 00:18:34,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 00:18:34,768 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:34,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2136453907, now seen corresponding path program 1 times [2022-11-22 00:18:34,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:34,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572952603] [2022-11-22 00:18:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:34,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-22 00:18:34,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:34,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572952603] [2022-11-22 00:18:34,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572952603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:34,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:34,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:18:34,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90722036] [2022-11-22 00:18:34,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:34,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:18:34,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:34,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:18:34,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:18:34,899 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:34,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:34,959 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2022-11-22 00:18:34,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:18:34,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-22 00:18:34,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:34,960 INFO L225 Difference]: With dead ends: 57 [2022-11-22 00:18:34,960 INFO L226 Difference]: Without dead ends: 57 [2022-11-22 00:18:34,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:18:34,961 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:34,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 11 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:34,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-22 00:18:34,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-22 00:18:34,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.326086956521739) internal successors, (61), 56 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:34,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-11-22 00:18:34,965 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 37 [2022-11-22 00:18:34,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:34,966 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-11-22 00:18:34,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:34,966 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-11-22 00:18:34,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 00:18:34,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:34,967 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-22 00:18:34,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 00:18:34,968 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:34,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:34,968 INFO L85 PathProgramCache]: Analyzing trace with hash 2136453908, now seen corresponding path program 1 times [2022-11-22 00:18:34,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:34,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764656119] [2022-11-22 00:18:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:34,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-22 00:18:35,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:35,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764656119] [2022-11-22 00:18:35,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764656119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:35,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599466244] [2022-11-22 00:18:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:35,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:35,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:35,109 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:35,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:18:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:35,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:18:35,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-22 00:18:35,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:18:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-22 00:18:35,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599466244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:18:35,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1614380981] [2022-11-22 00:18:35,343 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:18:35,343 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:18:35,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:18:35,344 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:18:35,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:18:35,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 25 [2022-11-22 00:18:35,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-11-22 00:18:35,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:35,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:35,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:35,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:35,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:35,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:35,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 251 [2022-11-22 00:18:35,542 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 18 treesize of output 14 [2022-11-22 00:18:35,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:35,569 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 15 treesize of output 15 [2022-11-22 00:18:35,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:35,660 INFO L321 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2022-11-22 00:18:35,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 144 treesize of output 155 [2022-11-22 00:18:35,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:35,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:35,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:35,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:35,940 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:18:37,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1614380981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:37,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:18:37,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 7] total 19 [2022-11-22 00:18:37,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334543375] [2022-11-22 00:18:37,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:37,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:18:37,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:37,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:18:37,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-11-22 00:18:37,225 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:37,742 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-11-22 00:18:37,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:18:37,743 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-22 00:18:37,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:37,743 INFO L225 Difference]: With dead ends: 62 [2022-11-22 00:18:37,744 INFO L226 Difference]: Without dead ends: 62 [2022-11-22 00:18:37,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-11-22 00:18:37,745 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:37,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 8 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:18:37,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-22 00:18:37,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-11-22 00:18:37,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.3125) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:37,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-11-22 00:18:37,753 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 37 [2022-11-22 00:18:37,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:37,753 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-11-22 00:18:37,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:37,754 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-11-22 00:18:37,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 00:18:37,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:37,757 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 4, 1, 1, 1] [2022-11-22 00:18:37,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:18:37,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 00:18:37,979 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:37,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:37,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2136357106, now seen corresponding path program 2 times [2022-11-22 00:18:37,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:37,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116218865] [2022-11-22 00:18:37,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:37,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-22 00:18:38,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:38,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116218865] [2022-11-22 00:18:38,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116218865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:38,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65142364] [2022-11-22 00:18:38,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:18:38,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:38,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:38,301 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:38,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:18:38,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-22 00:18:38,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:18:38,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 00:18:38,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-22 00:18:38,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:18:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-22 00:18:39,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65142364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:18:39,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1744909953] [2022-11-22 00:18:39,568 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 00:18:39,568 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:18:39,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:18:39,569 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:18:39,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:18:39,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 25 [2022-11-22 00:18:39,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-11-22 00:18:39,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:39,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:39,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:39,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:39,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:39,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:39,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 251 [2022-11-22 00:18:39,819 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 18 treesize of output 14 [2022-11-22 00:18:39,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:39,848 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 15 treesize of output 15 [2022-11-22 00:18:39,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:39,961 INFO L321 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2022-11-22 00:18:39,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 144 treesize of output 155 [2022-11-22 00:18:40,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:40,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:40,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:40,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:40,122 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:18:41,352 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2487#(and (= (select |#valid| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) 1) (<= (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|)) (<= 0 |ULTIMATE.start_getNumbers2_~i~1#1|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= 4 |~#numbers4~0.base|) (= |~#numbers3~0.offset| 0) (= |~#numbers2~0.base| 2) (= 3 |~#numbers3~0.base|) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|)) |ULTIMATE.start_getNumbers2_#t~mem3#1|) (= |~#array~0.offset| 0) (not (<= (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) 4 |~#numbers2~0.offset|) (select |#length| |~#numbers2~0.base|))) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (= |~#array~0.base| 1) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:18:41,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:18:41,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:18:41,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-11-22 00:18:41,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025096233] [2022-11-22 00:18:41,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:18:41,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 00:18:41,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:41,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 00:18:41,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-11-22 00:18:41,355 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:41,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:41,628 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-11-22 00:18:41,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:18:41,633 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 37 [2022-11-22 00:18:41,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:41,633 INFO L225 Difference]: With dead ends: 58 [2022-11-22 00:18:41,633 INFO L226 Difference]: Without dead ends: 58 [2022-11-22 00:18:41,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-11-22 00:18:41,635 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 106 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:41,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 54 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:41,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-22 00:18:41,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-11-22 00:18:41,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:41,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-11-22 00:18:41,638 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 37 [2022-11-22 00:18:41,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:41,638 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-11-22 00:18:41,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:41,638 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-11-22 00:18:41,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 00:18:41,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:41,639 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 00:18:41,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:18:41,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:41,856 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:41,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1805561703, now seen corresponding path program 1 times [2022-11-22 00:18:41,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:41,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136079937] [2022-11-22 00:18:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:41,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:41,984 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-22 00:18:41,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:41,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136079937] [2022-11-22 00:18:41,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136079937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:41,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:41,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 00:18:41,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203695544] [2022-11-22 00:18:41,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:41,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:18:41,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:41,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:18:41,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:18:41,988 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2022-11-22 00:18:42,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:42,015 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-11-22 00:18:42,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:18:42,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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 38 [2022-11-22 00:18:42,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:42,017 INFO L225 Difference]: With dead ends: 55 [2022-11-22 00:18:42,017 INFO L226 Difference]: Without dead ends: 55 [2022-11-22 00:18:42,017 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 [2022-11-22 00:18:42,018 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:42,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 9 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:18:42,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-22 00:18:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-22 00:18:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 54 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-11-22 00:18:42,025 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 38 [2022-11-22 00:18:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:42,025 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-11-22 00:18:42,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2022-11-22 00:18:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-11-22 00:18:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 00:18:42,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:42,028 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 00:18:42,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-22 00:18:42,029 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:42,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1805561704, now seen corresponding path program 1 times [2022-11-22 00:18:42,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:42,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432653990] [2022-11-22 00:18:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:42,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-22 00:18:42,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:42,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432653990] [2022-11-22 00:18:42,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432653990] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:42,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286502272] [2022-11-22 00:18:42,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:42,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:42,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:42,151 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:42,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 00:18:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:42,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:18:42,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-22 00:18:42,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:18:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-22 00:18:42,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286502272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:18:42,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [49348719] [2022-11-22 00:18:42,468 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:18:42,468 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:18:42,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:18:42,469 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:18:42,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:18:42,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 25 [2022-11-22 00:18:42,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-11-22 00:18:42,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:42,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:42,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:42,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:42,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:42,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:42,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 251 [2022-11-22 00:18:42,785 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 18 treesize of output 14 [2022-11-22 00:18:42,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:42,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:42,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:42,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 159 [2022-11-22 00:18:43,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:43,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:43,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:43,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:43,252 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:18:44,386 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2963#(and (= |ULTIMATE.start_getNumbers3_~i~2#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (+ (* |ULTIMATE.start_getNumbers3_~i~2#1| 4) |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|)) |ULTIMATE.start_getNumbers3_#t~mem6#1|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= 4 |~#numbers4~0.base|) (= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#numbers3~0.offset| 0) (= |~#numbers2~0.base| 2) (= |ULTIMATE.start_getNumbers2_#res#1.base| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (= 3 |~#numbers3~0.base|) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (= |ULTIMATE.start_getNumbers2_#res#1.base| |~#numbers2~0.base|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (<= (+ (* |ULTIMATE.start_getNumbers3_~i~2#1| 4) |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|)) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (= |~#array~0.base| 1) (= |ULTIMATE.start_getNumbers2_#res#1.offset| |~#numbers2~0.offset|) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (not (<= (+ (* |ULTIMATE.start_getNumbers3_~i~2#1| 4) 4 |~#numbers3~0.offset|) (select |#length| |~#numbers3~0.base|))) (= (select |#valid| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) 1))' at error location [2022-11-22 00:18:44,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:18:44,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:18:44,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-22 00:18:44,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833642624] [2022-11-22 00:18:44,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:18:44,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 00:18:44,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:44,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 00:18:44,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-11-22 00:18:44,389 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2022-11-22 00:18:44,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:44,494 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-11-22 00:18:44,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 00:18:44,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-22 00:18:44,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:44,495 INFO L225 Difference]: With dead ends: 73 [2022-11-22 00:18:44,496 INFO L226 Difference]: Without dead ends: 73 [2022-11-22 00:18:44,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-11-22 00:18:44,497 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:44,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 60 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:44,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-22 00:18:44,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-11-22 00:18:44,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 64 states have (on average 1.203125) internal successors, (77), 72 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:44,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-11-22 00:18:44,500 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 38 [2022-11-22 00:18:44,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:44,500 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-11-22 00:18:44,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2022-11-22 00:18:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-11-22 00:18:44,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-22 00:18:44,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:44,501 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-22 00:18:44,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 00:18:44,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 00:18:44,709 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:44,709 INFO L85 PathProgramCache]: Analyzing trace with hash 2006320296, now seen corresponding path program 2 times [2022-11-22 00:18:44,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:44,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236638647] [2022-11-22 00:18:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:44,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-22 00:18:45,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:45,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236638647] [2022-11-22 00:18:45,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236638647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:45,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:18:45,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:18:45,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787438493] [2022-11-22 00:18:45,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:45,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:18:45,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:45,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:18:45,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:18:45,073 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-11-22 00:18:45,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:45,129 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2022-11-22 00:18:45,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:18:45,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 56 [2022-11-22 00:18:45,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:45,130 INFO L225 Difference]: With dead ends: 74 [2022-11-22 00:18:45,130 INFO L226 Difference]: Without dead ends: 74 [2022-11-22 00:18:45,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:18:45,132 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:45,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 16 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:18:45,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-22 00:18:45,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-22 00:18:45,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 65 states have (on average 1.2) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:45,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-11-22 00:18:45,136 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 56 [2022-11-22 00:18:45,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:45,138 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-11-22 00:18:45,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-11-22 00:18:45,138 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-11-22 00:18:45,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-22 00:18:45,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:45,141 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 00:18:45,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-22 00:18:45,141 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:45,142 INFO L85 PathProgramCache]: Analyzing trace with hash -366450199, now seen corresponding path program 1 times [2022-11-22 00:18:45,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:45,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275280790] [2022-11-22 00:18:45,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:45,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-22 00:18:45,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:45,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275280790] [2022-11-22 00:18:45,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275280790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:45,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785862801] [2022-11-22 00:18:45,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:45,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:45,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:45,527 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:45,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 00:18:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:45,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 00:18:45,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-22 00:18:46,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:18:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-22 00:18:46,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785862801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:18:46,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1965905871] [2022-11-22 00:18:46,525 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:18:46,525 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:18:46,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:18:46,525 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:18:46,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:18:46,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 25 [2022-11-22 00:18:46,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-11-22 00:18:46,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:46,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:46,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:46,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:46,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:46,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:46,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 251 [2022-11-22 00:18:46,744 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 18 treesize of output 14 [2022-11-22 00:18:46,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:46,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:46,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:46,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 159 [2022-11-22 00:18:46,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:46,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:47,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:47,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:47,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:47,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:47,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:47,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 159 [2022-11-22 00:18:47,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:47,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:47,501 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:18:49,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3621#(and (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 2) (< |ULTIMATE.start_getNumbers3_~i~2#1| 10) (<= 0 |#NULL.base|) (<= |~#numbers4~0.offset| 0) (<= |~#numbers4~0.base| 4) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (<= 0 |~#array~0.offset|) (<= 3 |~#numbers3~0.base|) (<= 1 |~#array~0.base|) (<= 2 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 4 |~#numbers4~0.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (<= |~#numbers2~0.offset| 0) (<= |~#array~0.base| 1) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= |~#numbers3~0.base| 3) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= |~#numbers3~0.offset| 0) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_getNumbers3_~i~2#1| 4) |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|))) (<= 2 |~#numbers2~0.base|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= |~#numbers2~0.base| 2) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 2) (<= 0 |~#numbers2~0.offset|) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (<= 0 |ULTIMATE.start_getNumbers3_~i~2#1|) (<= 0 |~#numbers3~0.offset|) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (<= 2 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= 0 |~#numbers4~0.offset|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (<= |~#array~0.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 00:18:49,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:18:49,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:18:49,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-22 00:18:49,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034390368] [2022-11-22 00:18:49,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:18:49,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 00:18:49,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:49,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 00:18:49,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-11-22 00:18:49,949 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:50,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:50,271 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2022-11-22 00:18:50,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:18:50,272 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 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 58 [2022-11-22 00:18:50,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:50,273 INFO L225 Difference]: With dead ends: 110 [2022-11-22 00:18:50,273 INFO L226 Difference]: Without dead ends: 110 [2022-11-22 00:18:50,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 148 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-11-22 00:18:50,274 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 185 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:50,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 50 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:18:50,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-22 00:18:50,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2022-11-22 00:18:50,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 81 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:50,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2022-11-22 00:18:50,278 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 58 [2022-11-22 00:18:50,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:50,278 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2022-11-22 00:18:50,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:50,278 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2022-11-22 00:18:50,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-22 00:18:50,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:50,279 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1] [2022-11-22 00:18:50,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 00:18:50,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:50,488 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:50,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1524945715, now seen corresponding path program 1 times [2022-11-22 00:18:50,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:50,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680095336] [2022-11-22 00:18:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:50,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-22 00:18:50,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:50,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680095336] [2022-11-22 00:18:50,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680095336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:50,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411285345] [2022-11-22 00:18:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:50,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:50,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:50,800 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:50,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 00:18:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:50,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 00:18:50,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-22 00:18:51,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:18:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-22 00:18:51,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411285345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:18:51,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2026116458] [2022-11-22 00:18:51,731 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:18:51,731 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:18:51,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:18:51,732 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:18:51,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:18:51,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 25 [2022-11-22 00:18:51,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 40 [2022-11-22 00:18:51,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:51,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:51,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:51,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:51,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:51,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:51,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 244 [2022-11-22 00:18:51,937 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 18 treesize of output 14 [2022-11-22 00:18:51,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:51,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:52,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:52,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 159 [2022-11-22 00:18:52,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:52,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:52,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:52,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:52,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:52,382 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 15 treesize of output 15 [2022-11-22 00:18:52,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:52,519 INFO L321 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2022-11-22 00:18:52,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 144 treesize of output 155 [2022-11-22 00:18:52,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:52,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:52,695 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:18:54,372 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4188#(and (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 2) (< |ULTIMATE.start_getNumbers3_~i~2#1| 10) (= (select (select |#memory_int| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (+ (* |ULTIMATE.start_getNumbers3_~i~2#1| 4) |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|)) |ULTIMATE.start_getNumbers3_#t~mem6#1|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= 4 |~#numbers4~0.base|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#numbers3~0.offset| 0) (= |~#numbers2~0.base| 2) (<= 2 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (= 3 |~#numbers3~0.base|) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (<= (+ (* |ULTIMATE.start_getNumbers3_~i~2#1| 4) |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|)) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (= |~#array~0.base| 1) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 2) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (<= 0 |ULTIMATE.start_getNumbers3_~i~2#1|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (<= 2 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (not (<= (+ (* |ULTIMATE.start_getNumbers3_~i~2#1| 4) 4 |~#numbers3~0.offset|) (select |#length| |~#numbers3~0.base|))) (= (select |#valid| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) 1))' at error location [2022-11-22 00:18:54,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:18:54,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:18:54,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-22 00:18:54,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711180865] [2022-11-22 00:18:54,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:18:54,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 00:18:54,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:54,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 00:18:54,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-11-22 00:18:54,375 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2022-11-22 00:18:54,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:54,707 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2022-11-22 00:18:54,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:18:54,707 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 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) Word has length 59 [2022-11-22 00:18:54,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:54,709 INFO L225 Difference]: With dead ends: 83 [2022-11-22 00:18:54,709 INFO L226 Difference]: Without dead ends: 83 [2022-11-22 00:18:54,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 151 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-11-22 00:18:54,710 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 66 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:54,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 48 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:18:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-22 00:18:54,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-22 00:18:54,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 82 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:54,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-11-22 00:18:54,714 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 59 [2022-11-22 00:18:54,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:54,715 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-11-22 00:18:54,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2022-11-22 00:18:54,715 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-11-22 00:18:54,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-22 00:18:54,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:54,716 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 4, 4, 1, 1, 1, 1] [2022-11-22 00:18:54,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 00:18:54,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:54,923 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:18:54,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:54,924 INFO L85 PathProgramCache]: Analyzing trace with hash -306551404, now seen corresponding path program 2 times [2022-11-22 00:18:54,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:54,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144295454] [2022-11-22 00:18:54,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:54,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-22 00:18:55,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:55,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144295454] [2022-11-22 00:18:55,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144295454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:55,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175193382] [2022-11-22 00:18:55,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:18:55,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:55,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:55,490 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:55,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 00:18:55,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 00:18:55,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:18:55,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 00:18:55,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-11-22 00:18:56,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:18:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-11-22 00:18:57,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175193382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:18:57,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [69902359] [2022-11-22 00:18:57,330 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:18:57,330 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:18:57,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:18:57,330 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:18:57,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:18:57,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 25 [2022-11-22 00:18:57,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-11-22 00:18:57,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:57,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:57,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:57,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:57,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:57,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:57,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 251 [2022-11-22 00:18:57,550 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 18 treesize of output 14 [2022-11-22 00:18:57,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:57,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:57,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:57,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 159 [2022-11-22 00:18:57,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:57,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:57,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:57,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:57,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:57,910 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 15 treesize of output 15 [2022-11-22 00:18:58,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:58,037 INFO L321 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2022-11-22 00:18:58,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 144 treesize of output 155 [2022-11-22 00:18:58,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:58,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:18:58,284 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:00,917 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4785#(and (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 2) (< |ULTIMATE.start_getNumbers3_~i~2#1| 10) (<= |~#numbers4~0.offset| 0) (<= |~#numbers4~0.base| 4) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (<= 0 |~#array~0.offset|) (<= 3 |~#numbers3~0.base|) (<= 1 |~#array~0.base|) (<= 2 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 4 |~#numbers4~0.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (<= |~#numbers2~0.offset| 0) (<= |~#array~0.base| 1) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= |~#numbers3~0.base| 3) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= |~#numbers3~0.offset| 0) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_getNumbers3_~i~2#1| 4) |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|))) (<= 2 |~#numbers2~0.base|) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= |~#numbers2~0.base| 2) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 2) (<= 0 |~#numbers2~0.offset|) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (<= 0 |ULTIMATE.start_getNumbers3_~i~2#1|) (<= 0 |~#numbers3~0.offset|) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (<= 2 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= 0 |~#numbers4~0.offset|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (<= |~#array~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:19:00,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:19:00,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:19:00,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2022-11-22 00:19:00,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824986700] [2022-11-22 00:19:00,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:19:00,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 00:19:00,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:00,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 00:19:00,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-11-22 00:19:00,920 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 17 states, 16 states have (on average 3.125) internal successors, (50), 16 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) [2022-11-22 00:19:01,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:01,389 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2022-11-22 00:19:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 00:19:01,389 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.125) internal successors, (50), 16 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 67 [2022-11-22 00:19:01,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:01,390 INFO L225 Difference]: With dead ends: 82 [2022-11-22 00:19:01,391 INFO L226 Difference]: Without dead ends: 82 [2022-11-22 00:19:01,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 173 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 00:19:01,392 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 127 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:01,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 30 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:19:01,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-22 00:19:01,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-11-22 00:19:01,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 74 states have (on average 1.162162162162162) internal successors, (86), 81 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2022-11-22 00:19:01,396 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 67 [2022-11-22 00:19:01,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:01,397 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2022-11-22 00:19:01,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.125) internal successors, (50), 16 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) [2022-11-22 00:19:01,397 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2022-11-22 00:19:01,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-22 00:19:01,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:01,398 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 4, 1, 1, 1, 1] [2022-11-22 00:19:01,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-22 00:19:01,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:01,605 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:19:01,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:01,606 INFO L85 PathProgramCache]: Analyzing trace with hash -913158936, now seen corresponding path program 2 times [2022-11-22 00:19:01,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:01,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775078293] [2022-11-22 00:19:01,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:01,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-11-22 00:19:01,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:01,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775078293] [2022-11-22 00:19:01,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775078293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:01,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607716078] [2022-11-22 00:19:01,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:19:01,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:01,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:02,011 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:02,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 00:19:02,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-22 00:19:02,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:19:02,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 00:19:02,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-11-22 00:19:02,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-11-22 00:19:03,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607716078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:03,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2100547102] [2022-11-22 00:19:03,839 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:19:03,839 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:03,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:03,840 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:03,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:03,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 25 [2022-11-22 00:19:03,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-11-22 00:19:03,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:03,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:03,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:03,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:03,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:03,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:03,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 251 [2022-11-22 00:19:04,049 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 18 treesize of output 14 [2022-11-22 00:19:04,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:04,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:04,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:04,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 159 [2022-11-22 00:19:04,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:04,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:04,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:04,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:04,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:04,402 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 15 treesize of output 15 [2022-11-22 00:19:04,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:04,525 INFO L321 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2022-11-22 00:19:04,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 144 treesize of output 155 [2022-11-22 00:19:04,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:04,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:04,720 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:07,412 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5391#(and (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 2) (< |ULTIMATE.start_getNumbers3_~i~2#1| 10) (<= |~#numbers4~0.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (+ (* |ULTIMATE.start_getNumbers3_~i~2#1| 4) |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|)) |ULTIMATE.start_getNumbers3_#t~mem6#1|) (<= |~#numbers4~0.base| 4) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (<= 0 |~#array~0.offset|) (<= 3 |~#numbers3~0.base|) (<= 1 |~#array~0.base|) (<= 2 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 4 |~#numbers4~0.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (<= |~#numbers2~0.offset| 0) (<= |~#array~0.base| 1) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= |~#numbers3~0.base| 3) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= |~#numbers3~0.offset| 0) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (<= 2 |~#numbers2~0.base|) (<= (+ (* |ULTIMATE.start_getNumbers3_~i~2#1| 4) |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|)) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= |~#numbers2~0.base| 2) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 2) (<= 0 |~#numbers2~0.offset|) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (<= 0 |ULTIMATE.start_getNumbers3_~i~2#1|) (<= 0 |~#numbers3~0.offset|) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (<= 2 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= 0 |~#numbers4~0.offset|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (<= |~#array~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (not (<= (+ (* |ULTIMATE.start_getNumbers3_~i~2#1| 4) 4 |~#numbers3~0.offset|) (select |#length| |~#numbers3~0.base|))) (= (select |#valid| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) 1))' at error location [2022-11-22 00:19:07,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:19:07,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:19:07,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-11-22 00:19:07,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356976117] [2022-11-22 00:19:07,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:19:07,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 00:19:07,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:07,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 00:19:07,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-11-22 00:19:07,415 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2022-11-22 00:19:07,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:07,673 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2022-11-22 00:19:07,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:19:07,677 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) Word has length 68 [2022-11-22 00:19:07,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:07,678 INFO L225 Difference]: With dead ends: 81 [2022-11-22 00:19:07,678 INFO L226 Difference]: Without dead ends: 81 [2022-11-22 00:19:07,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 176 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-11-22 00:19:07,679 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 78 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:07,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 54 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:19:07,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-22 00:19:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-11-22 00:19:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 78 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:07,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-11-22 00:19:07,683 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 68 [2022-11-22 00:19:07,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:07,683 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-11-22 00:19:07,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2022-11-22 00:19:07,684 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-11-22 00:19:07,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-22 00:19:07,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:07,684 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:07,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:07,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-22 00:19:07,891 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:19:07,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:07,891 INFO L85 PathProgramCache]: Analyzing trace with hash -913078472, now seen corresponding path program 1 times [2022-11-22 00:19:07,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:07,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050470751] [2022-11-22 00:19:07,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:07,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2022-11-22 00:19:08,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:08,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050470751] [2022-11-22 00:19:08,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050470751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:08,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:19:08,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:19:08,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105078202] [2022-11-22 00:19:08,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:08,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:19:08,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:08,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:19:08,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:19:08,038 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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) [2022-11-22 00:19:08,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:08,074 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2022-11-22 00:19:08,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:19:08,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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 68 [2022-11-22 00:19:08,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:08,075 INFO L225 Difference]: With dead ends: 78 [2022-11-22 00:19:08,075 INFO L226 Difference]: Without dead ends: 78 [2022-11-22 00:19:08,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:19:08,076 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:08,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 10 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:19:08,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-22 00:19:08,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-22 00:19:08,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:08,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-11-22 00:19:08,080 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 68 [2022-11-22 00:19:08,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:08,081 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-11-22 00:19:08,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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) [2022-11-22 00:19:08,081 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-11-22 00:19:08,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-22 00:19:08,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:08,082 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:08,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-22 00:19:08,083 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:19:08,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:08,083 INFO L85 PathProgramCache]: Analyzing trace with hash -913078471, now seen corresponding path program 1 times [2022-11-22 00:19:08,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:08,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849468514] [2022-11-22 00:19:08,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:08,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-22 00:19:08,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:08,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849468514] [2022-11-22 00:19:08,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849468514] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:08,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125341498] [2022-11-22 00:19:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:08,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:08,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:08,274 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:08,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 00:19:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:08,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:19:08,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-22 00:19:08,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-22 00:19:08,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125341498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:08,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1565114623] [2022-11-22 00:19:08,591 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-22 00:19:08,591 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:08,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:08,592 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:08,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:08,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 25 [2022-11-22 00:19:08,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-11-22 00:19:08,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:08,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:08,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:08,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:08,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:08,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:08,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 251 [2022-11-22 00:19:08,802 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 18 treesize of output 14 [2022-11-22 00:19:08,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:08,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:08,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:08,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 159 [2022-11-22 00:19:09,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:09,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:09,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:09,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:09,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:09,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:09,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:09,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 159 [2022-11-22 00:19:09,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:09,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:09,487 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:11,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6144#(and (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 2) (<= 10 |ULTIMATE.start_getNumbers3_~i~2#1|) (= |ULTIMATE.start_getNumbers3_#res#1.base| |~#numbers3~0.base|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= 4 |~#numbers4~0.base|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#numbers3~0.offset| 0) (= |~#numbers2~0.base| 2) (<= 2 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (= 3 |~#numbers3~0.base|) (= |ULTIMATE.start_getNumbers3_#res#1.base| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (= |ULTIMATE.start_getNumbers4_~i~3#1| 0) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (= |ULTIMATE.start_getNumbers3_#res#1.offset| |ULTIMATE.start_getNumbers4_~numbers~2#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |~#array~0.offset| 0) (not (<= (+ |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 4 (* |ULTIMATE.start_getNumbers4_~i~3#1| 4)) (select |#length| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|))) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (= |~#array~0.base| 1) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 2) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (= |ULTIMATE.start_getNumbers3_#res#1.offset| |~#numbers3~0.offset|) (<= 2 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:19:11,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:19:11,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:19:11,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-22 00:19:11,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691674786] [2022-11-22 00:19:11,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:19:11,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 00:19:11,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:11,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 00:19:11,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-11-22 00:19:11,592 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:11,678 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2022-11-22 00:19:11,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 00:19:11,679 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 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 68 [2022-11-22 00:19:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:11,680 INFO L225 Difference]: With dead ends: 96 [2022-11-22 00:19:11,680 INFO L226 Difference]: Without dead ends: 96 [2022-11-22 00:19:11,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 179 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-11-22 00:19:11,681 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:11,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 60 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:19:11,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-22 00:19:11,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-11-22 00:19:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 95 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-11-22 00:19:11,685 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 68 [2022-11-22 00:19:11,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:11,685 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-11-22 00:19:11,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:11,686 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-11-22 00:19:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-22 00:19:11,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:11,687 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:11,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:11,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-22 00:19:11,895 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:19:11,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:11,895 INFO L85 PathProgramCache]: Analyzing trace with hash -352092263, now seen corresponding path program 2 times [2022-11-22 00:19:11,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:11,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809969973] [2022-11-22 00:19:11,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:11,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-22 00:19:12,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:12,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809969973] [2022-11-22 00:19:12,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809969973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:12,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:19:12,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:19:12,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666426462] [2022-11-22 00:19:12,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:12,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:19:12,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:12,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:19:12,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:19:12,317 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:12,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:12,387 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2022-11-22 00:19:12,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:19:12,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-22 00:19:12,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:12,388 INFO L225 Difference]: With dead ends: 101 [2022-11-22 00:19:12,388 INFO L226 Difference]: Without dead ends: 101 [2022-11-22 00:19:12,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:19:12,389 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:12,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 14 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:19:12,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-22 00:19:12,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2022-11-22 00:19:12,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 92 states have (on average 1.108695652173913) internal successors, (102), 97 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2022-11-22 00:19:12,394 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 86 [2022-11-22 00:19:12,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:12,395 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2022-11-22 00:19:12,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:12,395 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2022-11-22 00:19:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 00:19:12,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:12,396 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:12,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-22 00:19:12,396 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:19:12,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:12,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1970041753, now seen corresponding path program 1 times [2022-11-22 00:19:12,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:12,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143792774] [2022-11-22 00:19:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:12,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-22 00:19:12,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:12,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143792774] [2022-11-22 00:19:12,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143792774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:12,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:19:12,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 00:19:12,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139373839] [2022-11-22 00:19:12,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:12,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:19:12,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:12,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:19:12,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:19:12,595 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2022-11-22 00:19:12,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:12,622 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2022-11-22 00:19:12,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:19:12,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 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 87 [2022-11-22 00:19:12,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:12,624 INFO L225 Difference]: With dead ends: 97 [2022-11-22 00:19:12,624 INFO L226 Difference]: Without dead ends: 97 [2022-11-22 00:19:12,625 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 [2022-11-22 00:19:12,625 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:12,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 7 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:19:12,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-22 00:19:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-22 00:19:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0978260869565217) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-11-22 00:19:12,637 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 87 [2022-11-22 00:19:12,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:12,637 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-11-22 00:19:12,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2022-11-22 00:19:12,638 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-11-22 00:19:12,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 00:19:12,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:12,639 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:12,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-22 00:19:12,640 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:19:12,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:12,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1970041754, now seen corresponding path program 1 times [2022-11-22 00:19:12,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:12,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990796251] [2022-11-22 00:19:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:12,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-22 00:19:12,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:12,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990796251] [2022-11-22 00:19:12,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990796251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:12,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:19:12,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:19:12,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822477920] [2022-11-22 00:19:12,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:12,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:19:12,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:12,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:19:12,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:19:12,944 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-22 00:19:12,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:12,985 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-11-22 00:19:12,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:19:12,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 87 [2022-11-22 00:19:12,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:12,986 INFO L225 Difference]: With dead ends: 98 [2022-11-22 00:19:12,986 INFO L226 Difference]: Without dead ends: 98 [2022-11-22 00:19:12,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:19:12,987 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:12,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 12 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:19:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-22 00:19:12,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-11-22 00:19:12,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.096774193548387) internal successors, (102), 97 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:12,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2022-11-22 00:19:12,991 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 87 [2022-11-22 00:19:12,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:12,991 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2022-11-22 00:19:12,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-22 00:19:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2022-11-22 00:19:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-22 00:19:12,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:12,997 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:12,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-22 00:19:12,998 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:19:12,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:12,999 INFO L85 PathProgramCache]: Analyzing trace with hash -870413021, now seen corresponding path program 1 times [2022-11-22 00:19:12,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:12,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32338199] [2022-11-22 00:19:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:13,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-22 00:19:13,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:13,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32338199] [2022-11-22 00:19:13,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32338199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:13,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700043186] [2022-11-22 00:19:13,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:13,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:13,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:13,554 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:13,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 00:19:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:13,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 00:19:13,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-22 00:19:14,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-22 00:19:14,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700043186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:14,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1272794717] [2022-11-22 00:19:14,956 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 00:19:14,956 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:14,957 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:14,957 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:14,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:14,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 25 [2022-11-22 00:19:15,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 40 [2022-11-22 00:19:15,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 244 [2022-11-22 00:19:15,162 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 18 treesize of output 14 [2022-11-22 00:19:15,180 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 18 treesize of output 14 [2022-11-22 00:19:15,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2022-11-22 00:19:15,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:19:15,344 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-22 00:19:15,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 224 treesize of output 223 [2022-11-22 00:19:15,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:15,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:15,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 00:19:15,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:19:15,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,830 INFO L321 Elim1Store]: treesize reduction 41, result has 24.1 percent of original size [2022-11-22 00:19:15,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 270 treesize of output 269 [2022-11-22 00:19:15,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:15,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:16,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:16,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:16,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:16,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 159 [2022-11-22 00:19:16,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:16,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:16,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:16,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:16,578 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:19,401 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7487#(and (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 2) (<= 10 |ULTIMATE.start_getNumbers3_~i~2#1|) (<= 0 |ULTIMATE.start_getNumbers4_~i~3#1|) (<= 3 |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (<= |ULTIMATE.start_getNumbers3_#res#1.offset| 0) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= 4 |~#numbers4~0.base|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#numbers3~0.offset| 0) (= |~#numbers2~0.base| 2) (<= 2 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 3 |ULTIMATE.start_getNumbers3_#res#1.base|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.base| 3) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (= 3 |~#numbers3~0.base|) (<= 0 |ULTIMATE.start_getNumbers3_#res#1.offset|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 0) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |~#array~0.offset| 0) (not (<= (+ |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 4 (* |ULTIMATE.start_getNumbers4_~i~3#1| 4)) (select |#length| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|))) (<= 0 |ULTIMATE.start_getNumbers4_~numbers~2#1.offset|) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (= |~#array~0.base| 1) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 2) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (<= 2 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_getNumbers3_#res#1.base| 3) (= |#NULL.base| 0))' at error location [2022-11-22 00:19:19,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:19:19,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:19:19,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2022-11-22 00:19:19,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670458355] [2022-11-22 00:19:19,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:19:19,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 00:19:19,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:19,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 00:19:19,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-11-22 00:19:19,403 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:19,711 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2022-11-22 00:19:19,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:19:19,712 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-11-22 00:19:19,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:19,713 INFO L225 Difference]: With dead ends: 120 [2022-11-22 00:19:19,713 INFO L226 Difference]: Without dead ends: 120 [2022-11-22 00:19:19,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-11-22 00:19:19,714 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 153 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:19,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 36 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:19:19,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-22 00:19:19,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2022-11-22 00:19:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 105 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:19,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2022-11-22 00:19:19,717 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 89 [2022-11-22 00:19:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:19,718 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2022-11-22 00:19:19,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2022-11-22 00:19:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-22 00:19:19,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:19,719 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:19,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:19,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:19,920 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:19:19,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:19,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1212999856, now seen corresponding path program 1 times [2022-11-22 00:19:19,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:19,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979806426] [2022-11-22 00:19:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:19,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-22 00:19:20,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:20,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979806426] [2022-11-22 00:19:20,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979806426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:20,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506014845] [2022-11-22 00:19:20,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:20,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:20,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:20,274 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:20,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 00:19:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:20,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 00:19:20,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-22 00:19:21,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-22 00:19:21,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506014845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:21,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1500621945] [2022-11-22 00:19:21,670 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 00:19:21,671 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:21,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:21,672 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:21,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:21,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 25 [2022-11-22 00:19:21,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 40 [2022-11-22 00:19:21,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:21,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:21,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:21,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:21,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:21,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:21,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 244 [2022-11-22 00:19:21,924 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 18 treesize of output 14 [2022-11-22 00:19:21,939 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 18 treesize of output 14 [2022-11-22 00:19:22,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:22,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:22,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-22 00:19:22,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:19:22,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:22,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:22,134 INFO L321 Elim1Store]: treesize reduction 41, result has 24.1 percent of original size [2022-11-22 00:19:22,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 219 [2022-11-22 00:19:22,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:22,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:22,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:22,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:22,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:22,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:22,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:22,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-22 00:19:22,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:19:22,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:22,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:22,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:22,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:22,547 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-22 00:19:22,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 273 [2022-11-22 00:19:22,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:22,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:22,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:22,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2022-11-22 00:19:22,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:22,882 INFO L321 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2022-11-22 00:19:22,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 144 treesize of output 155 [2022-11-22 00:19:23,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:23,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:23,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:23,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:23,175 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:26,343 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8279#(and (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 2) (<= 10 |ULTIMATE.start_getNumbers3_~i~2#1|) (<= 3 |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (<= |ULTIMATE.start_getNumbers3_#res#1.offset| 0) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= 4 |~#numbers4~0.base|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#numbers3~0.offset| 0) (= |~#numbers2~0.base| 2) (<= 2 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 3 |ULTIMATE.start_getNumbers3_#res#1.base|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.base| 3) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (= 3 |~#numbers3~0.base|) (<= 0 |ULTIMATE.start_getNumbers3_#res#1.offset|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 0) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 0 (+ |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| (* |ULTIMATE.start_getNumbers4_~i~3#1| 4))) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (<= (+ |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 4 (* |ULTIMATE.start_getNumbers4_~i~3#1| 4)) (select |#length| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|)) (= |~#array~0.offset| 0) (<= 0 |ULTIMATE.start_getNumbers4_~numbers~2#1.offset|) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (= |~#array~0.base| 1) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 2) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (not (<= (+ |~#numbers4~0.offset| 4 (* |ULTIMATE.start_getNumbers4_~i~3#1| 4)) (select |#length| |~#numbers4~0.base|))) (<= 2 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (= |ULTIMATE.start_getNumbers4_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (+ |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| (* |ULTIMATE.start_getNumbers4_~i~3#1| 4)))) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_getNumbers3_#res#1.base| 3) (= (select |#valid| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-22 00:19:26,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:19:26,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:19:26,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-22 00:19:26,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43214560] [2022-11-22 00:19:26,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:19:26,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 00:19:26,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:26,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 00:19:26,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-11-22 00:19:26,345 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:26,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:26,561 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2022-11-22 00:19:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:19:26,561 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 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 90 [2022-11-22 00:19:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:26,562 INFO L225 Difference]: With dead ends: 107 [2022-11-22 00:19:26,562 INFO L226 Difference]: Without dead ends: 107 [2022-11-22 00:19:26,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-11-22 00:19:26,564 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:26,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 30 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:19:26,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-22 00:19:26,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-11-22 00:19:26,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.088235294117647) internal successors, (111), 106 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2022-11-22 00:19:26,567 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 90 [2022-11-22 00:19:26,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:26,568 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2022-11-22 00:19:26,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:26,568 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2022-11-22 00:19:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-22 00:19:26,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:26,569 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 5, 4, 4, 1, 1, 1, 1, 1] [2022-11-22 00:19:26,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:26,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-22 00:19:26,776 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:19:26,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:26,777 INFO L85 PathProgramCache]: Analyzing trace with hash -992024807, now seen corresponding path program 2 times [2022-11-22 00:19:26,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:26,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733143982] [2022-11-22 00:19:26,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:26,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-22 00:19:27,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:27,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733143982] [2022-11-22 00:19:27,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733143982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:27,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416216095] [2022-11-22 00:19:27,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:19:27,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:27,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:27,430 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:27,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 00:19:27,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 00:19:27,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:19:27,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 00:19:27,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2022-11-22 00:19:28,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:19:28,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416216095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:28,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:19:28,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2022-11-22 00:19:28,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707465695] [2022-11-22 00:19:28,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:28,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:19:28,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:28,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:19:28,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-22 00:19:28,336 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:28,466 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2022-11-22 00:19:28,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:19:28,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-22 00:19:28,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:28,468 INFO L225 Difference]: With dead ends: 106 [2022-11-22 00:19:28,468 INFO L226 Difference]: Without dead ends: 106 [2022-11-22 00:19:28,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-22 00:19:28,469 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:28,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 16 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:19:28,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-22 00:19:28,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-11-22 00:19:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 105 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2022-11-22 00:19:28,479 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 98 [2022-11-22 00:19:28,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:28,480 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2022-11-22 00:19:28,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2022-11-22 00:19:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-22 00:19:28,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:28,481 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:28,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:28,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:28,682 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:19:28,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:28,683 INFO L85 PathProgramCache]: Analyzing trace with hash -687937643, now seen corresponding path program 1 times [2022-11-22 00:19:28,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:28,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279952048] [2022-11-22 00:19:28,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:28,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-11-22 00:19:28,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:28,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279952048] [2022-11-22 00:19:28,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279952048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:28,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:19:28,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:19:28,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691732134] [2022-11-22 00:19:28,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:28,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:19:28,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:28,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:19:28,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:19:28,867 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:28,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:28,903 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2022-11-22 00:19:28,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:19:28,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-11-22 00:19:28,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:28,904 INFO L225 Difference]: With dead ends: 105 [2022-11-22 00:19:28,905 INFO L226 Difference]: Without dead ends: 105 [2022-11-22 00:19:28,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:19:28,906 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:28,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 9 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:19:28,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-22 00:19:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-22 00:19:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 102 states have (on average 1.0686274509803921) internal successors, (109), 104 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:28,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-11-22 00:19:28,910 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 99 [2022-11-22 00:19:28,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:28,910 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-11-22 00:19:28,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:28,911 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-11-22 00:19:28,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-22 00:19:28,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:28,912 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:28,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-22 00:19:28,912 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:19:28,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:28,913 INFO L85 PathProgramCache]: Analyzing trace with hash -687937642, now seen corresponding path program 1 times [2022-11-22 00:19:28,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:28,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961760707] [2022-11-22 00:19:28,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:28,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-22 00:19:29,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:29,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961760707] [2022-11-22 00:19:29,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961760707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:29,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304063040] [2022-11-22 00:19:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:29,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:29,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:29,121 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:29,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 00:19:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:19:29,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-22 00:19:29,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-22 00:19:29,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304063040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:29,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [428979511] [2022-11-22 00:19:29,578 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:19:29,579 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:29,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:29,579 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:29,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:29,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 25 [2022-11-22 00:19:29,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-11-22 00:19:29,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:29,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:29,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:29,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:29,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:29,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:29,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 251 [2022-11-22 00:19:29,813 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 18 treesize of output 14 [2022-11-22 00:19:29,830 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 18 treesize of output 14 [2022-11-22 00:19:29,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:29,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:29,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2022-11-22 00:19:29,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:29,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:29,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:19:30,001 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-22 00:19:30,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 224 treesize of output 223 [2022-11-22 00:19:30,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:30,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:30,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:30,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:30,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:30,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:30,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:30,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:30,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-22 00:19:30,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:19:30,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:30,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:30,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:30,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:30,407 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-22 00:19:30,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 273 [2022-11-22 00:19:30,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:30,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:30,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:30,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:30,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:30,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 159 [2022-11-22 00:19:30,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:30,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:31,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:31,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:31,148 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:34,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9856#(and (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 2) (<= 10 |ULTIMATE.start_getNumbers3_~i~2#1|) (<= 3 |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (<= |ULTIMATE.start_getNumbers3_#res#1.offset| 0) (= |ULTIMATE.start_main_~i~4#1| 0) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= 4 |~#numbers4~0.base|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#numbers3~0.offset| 0) (= |ULTIMATE.start_getNumbers4_#res#1.offset| |ULTIMATE.start_main_~numbers~3#1.offset|) (= |~#numbers2~0.base| 2) (<= 2 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 3 |ULTIMATE.start_getNumbers3_#res#1.base|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.base| 3) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (<= 10 |ULTIMATE.start_getNumbers4_~i~3#1|) (= 3 |~#numbers3~0.base|) (not (<= (+ (* |ULTIMATE.start_main_~i~4#1| 4) |ULTIMATE.start_main_~numbers~3#1.offset| 4) (select |#length| |ULTIMATE.start_main_~numbers~3#1.base|))) (<= 0 |ULTIMATE.start_getNumbers3_#res#1.offset|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 0) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (= |ULTIMATE.start_getNumbers4_#res#1.base| |~#numbers4~0.base|) (= |ULTIMATE.start_getNumbers4_#res#1.offset| |~#numbers4~0.offset|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |~#array~0.offset| 0) (<= 0 |ULTIMATE.start_getNumbers4_~numbers~2#1.offset|) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (= |~#array~0.base| 1) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 2) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (<= 2 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_getNumbers3_#res#1.base| 3) (= |ULTIMATE.start_main_~numbers~3#1.base| |ULTIMATE.start_getNumbers4_#res#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 00:19:34,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:19:34,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:19:34,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-22 00:19:34,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028643731] [2022-11-22 00:19:34,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:19:34,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 00:19:34,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:34,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 00:19:34,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-11-22 00:19:34,227 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:34,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:34,335 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2022-11-22 00:19:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 00:19:34,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 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 99 [2022-11-22 00:19:34,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:34,337 INFO L225 Difference]: With dead ends: 126 [2022-11-22 00:19:34,337 INFO L226 Difference]: Without dead ends: 126 [2022-11-22 00:19:34,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 275 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-11-22 00:19:34,338 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:34,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:19:34,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-22 00:19:34,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2022-11-22 00:19:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 118 states have (on average 1.1016949152542372) internal successors, (130), 120 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2022-11-22 00:19:34,344 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 99 [2022-11-22 00:19:34,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:34,344 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2022-11-22 00:19:34,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:34,345 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2022-11-22 00:19:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-22 00:19:34,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:34,346 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 4, 1, 1, 1, 1, 1] [2022-11-22 00:19:34,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-22 00:19:34,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:34,554 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:19:34,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:34,554 INFO L85 PathProgramCache]: Analyzing trace with hash -687997926, now seen corresponding path program 2 times [2022-11-22 00:19:34,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:34,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201432398] [2022-11-22 00:19:34,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:34,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-22 00:19:35,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:35,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201432398] [2022-11-22 00:19:35,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201432398] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:35,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447932582] [2022-11-22 00:19:35,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:19:35,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:35,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:35,108 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:35,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 00:19:35,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-22 00:19:35,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:19:35,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 00:19:35,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2022-11-22 00:19:36,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2022-11-22 00:19:37,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447932582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:37,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [665443108] [2022-11-22 00:19:37,704 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 00:19:37,704 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:37,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:37,705 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:37,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:37,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 25 [2022-11-22 00:19:37,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-11-22 00:19:37,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:37,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:37,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:37,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:37,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:37,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:37,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 251 [2022-11-22 00:19:37,939 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 18 treesize of output 14 [2022-11-22 00:19:37,956 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 18 treesize of output 14 [2022-11-22 00:19:38,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2022-11-22 00:19:38,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:19:38,114 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-22 00:19:38,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 224 treesize of output 223 [2022-11-22 00:19:38,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:38,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:38,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-22 00:19:38,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:19:38,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,544 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-22 00:19:38,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 273 [2022-11-22 00:19:38,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:38,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:38,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 159 [2022-11-22 00:19:38,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:38,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:39,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:39,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:39,120 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:42,458 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10719#(and (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 2) (<= 10 |ULTIMATE.start_getNumbers3_~i~2#1|) (<= 3 |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (<= |ULTIMATE.start_getNumbers3_#res#1.offset| 0) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= 4 |~#numbers4~0.base|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#numbers3~0.offset| 0) (= |~#numbers2~0.base| 2) (<= 2 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 3 |ULTIMATE.start_getNumbers3_#res#1.base|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.base| 3) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (= 3 |~#numbers3~0.base|) (<= 0 |ULTIMATE.start_getNumbers3_#res#1.offset|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 0) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 0 (+ |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| (* |ULTIMATE.start_getNumbers4_~i~3#1| 4))) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (<= (+ |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 4 (* |ULTIMATE.start_getNumbers4_~i~3#1| 4)) (select |#length| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|)) (= |~#array~0.offset| 0) (<= 0 |ULTIMATE.start_getNumbers4_~numbers~2#1.offset|) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (= |~#array~0.base| 1) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 2) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (not (<= (+ |~#numbers4~0.offset| 4 (* |ULTIMATE.start_getNumbers4_~i~3#1| 4)) (select |#length| |~#numbers4~0.base|))) (<= 2 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (= |ULTIMATE.start_getNumbers4_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (+ |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| (* |ULTIMATE.start_getNumbers4_~i~3#1| 4)))) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_getNumbers3_#res#1.base| 3) (= (select |#valid| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-22 00:19:42,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:19:42,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:19:42,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2022-11-22 00:19:42,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667342224] [2022-11-22 00:19:42,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:19:42,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 00:19:42,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:42,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 00:19:42,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-11-22 00:19:42,461 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand has 16 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:42,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:42,963 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2022-11-22 00:19:42,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 00:19:42,964 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 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 99 [2022-11-22 00:19:42,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:42,965 INFO L225 Difference]: With dead ends: 120 [2022-11-22 00:19:42,965 INFO L226 Difference]: Without dead ends: 120 [2022-11-22 00:19:42,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 271 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 00:19:42,967 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 112 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:42,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 33 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:19:42,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-22 00:19:42,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-11-22 00:19:42,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 118 states have (on average 1.0508474576271187) internal successors, (124), 119 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:42,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2022-11-22 00:19:42,971 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 99 [2022-11-22 00:19:42,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:42,972 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2022-11-22 00:19:42,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:42,972 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2022-11-22 00:19:42,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-22 00:19:42,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:42,974 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:42,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:43,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-22 00:19:43,181 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:19:43,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:43,181 INFO L85 PathProgramCache]: Analyzing trace with hash 502451286, now seen corresponding path program 2 times [2022-11-22 00:19:43,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:43,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175953757] [2022-11-22 00:19:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:43,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-11-22 00:19:43,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:43,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175953757] [2022-11-22 00:19:43,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175953757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:43,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:19:43,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:19:43,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408347206] [2022-11-22 00:19:43,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:43,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:19:43,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:43,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:19:43,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:19:43,650 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:43,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:43,706 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2022-11-22 00:19:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:19:43,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-11-22 00:19:43,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:43,708 INFO L225 Difference]: With dead ends: 122 [2022-11-22 00:19:43,708 INFO L226 Difference]: Without dead ends: 122 [2022-11-22 00:19:43,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:19:43,709 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:43,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 10 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:19:43,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-22 00:19:43,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-22 00:19:43,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 120 states have (on average 1.05) internal successors, (126), 121 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2022-11-22 00:19:43,714 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 117 [2022-11-22 00:19:43,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:43,714 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2022-11-22 00:19:43,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:43,715 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2022-11-22 00:19:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-22 00:19:43,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:43,716 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:43,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-22 00:19:43,717 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:19:43,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:43,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1819371053, now seen corresponding path program 1 times [2022-11-22 00:19:43,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:43,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810779511] [2022-11-22 00:19:43,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:43,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-11-22 00:19:44,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:44,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810779511] [2022-11-22 00:19:44,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810779511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:44,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132221464] [2022-11-22 00:19:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:44,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:44,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:44,205 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:44,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 00:19:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:44,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 00:19:44,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-11-22 00:19:45,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-11-22 00:19:45,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132221464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:45,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [145265007] [2022-11-22 00:19:45,947 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 00:19:45,947 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:45,947 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:45,948 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:45,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:45,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 25 [2022-11-22 00:19:46,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 40 [2022-11-22 00:19:46,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 244 [2022-11-22 00:19:46,171 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 18 treesize of output 14 [2022-11-22 00:19:46,188 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 18 treesize of output 14 [2022-11-22 00:19:46,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-22 00:19:46,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:19:46,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,349 INFO L321 Elim1Store]: treesize reduction 41, result has 24.1 percent of original size [2022-11-22 00:19:46,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 219 [2022-11-22 00:19:46,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:46,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:46,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 00:19:46,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:19:46,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,846 INFO L321 Elim1Store]: treesize reduction 41, result has 24.1 percent of original size [2022-11-22 00:19:46,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 270 treesize of output 269 [2022-11-22 00:19:46,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:46,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:47,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:47,002 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 15 treesize of output 15 [2022-11-22 00:19:47,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:47,124 INFO L321 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2022-11-22 00:19:47,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 144 treesize of output 155 [2022-11-22 00:19:47,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:47,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:47,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:19:47,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 00:19:47,643 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:52,486 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11957#(and (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 2) (<= 10 |ULTIMATE.start_getNumbers3_~i~2#1|) (<= 4 |ULTIMATE.start_getNumbers4_#res#1.base|) (<= 3 |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (<= |ULTIMATE.start_getNumbers3_#res#1.offset| 0) (<= |ULTIMATE.start_getNumbers4_#res#1.base| 4) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= 4 |~#numbers4~0.base|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (<= |ULTIMATE.start_main_~numbers~3#1.offset| 0) (<= 0 |ULTIMATE.start_getNumbers4_#res#1.offset|) (<= 3 |~#numbers3~0.base|) (<= 1 |~#array~0.base|) (<= 2 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 3 |ULTIMATE.start_getNumbers3_#res#1.base|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.base| 3) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (<= 10 |ULTIMATE.start_getNumbers4_~i~3#1|) (<= |~#numbers2~0.offset| 0) (<= |~#array~0.base| 1) (not (<= (+ (* |ULTIMATE.start_main_~i~4#1| 4) |ULTIMATE.start_main_~numbers~3#1.offset| 4) (select |#length| |ULTIMATE.start_main_~numbers~3#1.base|))) (<= 0 |ULTIMATE.start_getNumbers3_#res#1.offset|) (<= 4 |ULTIMATE.start_main_~numbers~3#1.base|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 0) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= |~#numbers3~0.base| 3) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= |~#numbers3~0.offset| 0) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (<= 2 |~#numbers2~0.base|) (<= |ULTIMATE.start_main_~numbers~3#1.base| 4) (= |~#array~0.offset| 0) (<= 0 |ULTIMATE.start_getNumbers4_~numbers~2#1.offset|) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~numbers~3#1.offset|) (<= |~#numbers2~0.base| 2) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 2) (<= 0 |~#numbers2~0.offset|) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (<= 0 |~#numbers3~0.offset|) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (<= 2 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (< |ULTIMATE.start_main_~i~4#1| 10) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_getNumbers3_#res#1.base| 3) (= |#NULL.base| 0) (<= |ULTIMATE.start_getNumbers4_#res#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~4#1|))' at error location [2022-11-22 00:19:52,486 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:19:52,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:19:52,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-22 00:19:52,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969718523] [2022-11-22 00:19:52,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:19:52,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 00:19:52,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:52,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 00:19:52,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-11-22 00:19:52,488 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 11 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:52,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:52,701 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2022-11-22 00:19:52,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:19:52,701 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 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 119 [2022-11-22 00:19:52,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:52,702 INFO L225 Difference]: With dead ends: 132 [2022-11-22 00:19:52,702 INFO L226 Difference]: Without dead ends: 132 [2022-11-22 00:19:52,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2022-11-22 00:19:52,704 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:52,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 27 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:19:52,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-22 00:19:52,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2022-11-22 00:19:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 126 states have (on average 1.0634920634920635) internal successors, (134), 127 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2022-11-22 00:19:52,708 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 119 [2022-11-22 00:19:52,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:52,708 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2022-11-22 00:19:52,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2022-11-22 00:19:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-22 00:19:52,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:52,717 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:52,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:52,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-22 00:19:52,926 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:19:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:52,926 INFO L85 PathProgramCache]: Analyzing trace with hash 363915852, now seen corresponding path program 1 times [2022-11-22 00:19:52,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:52,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882471193] [2022-11-22 00:19:52,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:52,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2022-11-22 00:19:53,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:53,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882471193] [2022-11-22 00:19:53,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882471193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:53,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:19:53,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 00:19:53,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404817172] [2022-11-22 00:19:53,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:53,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:19:53,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:53,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:19:53,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:19:53,059 INFO L87 Difference]: Start difference. First operand 128 states and 134 transitions. Second operand has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:53,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:53,080 INFO L93 Difference]: Finished difference Result 127 states and 133 transitions. [2022-11-22 00:19:53,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:19:53,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-11-22 00:19:53,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:53,082 INFO L225 Difference]: With dead ends: 127 [2022-11-22 00:19:53,082 INFO L226 Difference]: Without dead ends: 126 [2022-11-22 00:19:53,082 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 [2022-11-22 00:19:53,083 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:53,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:19:53,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-22 00:19:53,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-22 00:19:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:53,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2022-11-22 00:19:53,087 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 121 [2022-11-22 00:19:53,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:53,088 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2022-11-22 00:19:53,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:53,088 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2022-11-22 00:19:53,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-22 00:19:53,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:53,090 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:53,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-22 00:19:53,090 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-22 00:19:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:53,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1809078578, now seen corresponding path program 2 times [2022-11-22 00:19:53,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:53,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220611390] [2022-11-22 00:19:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:53,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-11-22 00:19:53,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:53,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220611390] [2022-11-22 00:19:53,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220611390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:53,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246158876] [2022-11-22 00:19:53,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:19:53,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:53,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:53,707 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:53,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-22 00:19:54,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 00:19:54,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:19:54,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 00:19:54,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2022-11-22 00:19:54,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:19:54,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246158876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:54,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:19:54,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-11-22 00:19:54,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107483218] [2022-11-22 00:19:54,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:54,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:19:54,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:54,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:19:54,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:19:54,858 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:54,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:54,952 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2022-11-22 00:19:54,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:19:54,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2022-11-22 00:19:54,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:54,953 INFO L225 Difference]: With dead ends: 125 [2022-11-22 00:19:54,953 INFO L226 Difference]: Without dead ends: 0 [2022-11-22 00:19:54,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:19:54,954 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:54,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:19:54,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-22 00:19:54,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-22 00:19:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-22 00:19:54,955 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 125 [2022-11-22 00:19:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:54,956 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-22 00:19:54,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:19:54,956 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-22 00:19:54,956 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-22 00:19:54,959 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 17 remaining) [2022-11-22 00:19:54,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 17 remaining) [2022-11-22 00:19:54,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 17 remaining) [2022-11-22 00:19:54,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 17 remaining) [2022-11-22 00:19:54,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 17 remaining) [2022-11-22 00:19:54,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 17 remaining) [2022-11-22 00:19:54,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 17 remaining) [2022-11-22 00:19:54,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 17 remaining) [2022-11-22 00:19:54,961 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 17 remaining) [2022-11-22 00:19:54,961 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 17 remaining) [2022-11-22 00:19:54,961 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 17 remaining) [2022-11-22 00:19:54,961 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 17 remaining) [2022-11-22 00:19:54,961 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 17 remaining) [2022-11-22 00:19:54,962 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 17 remaining) [2022-11-22 00:19:54,962 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 17 remaining) [2022-11-22 00:19:54,962 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 17 remaining) [2022-11-22 00:19:54,962 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK (0 of 17 remaining) [2022-11-22 00:19:54,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:55,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-22 00:19:55,165 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:55,168 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-22 00:19:55,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:19:55 BoogieIcfgContainer [2022-11-22 00:19:55,172 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-22 00:19:55,173 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-22 00:19:55,173 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-22 00:19:55,173 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-22 00:19:55,173 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:18:21" (3/4) ... [2022-11-22 00:19:55,178 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-22 00:19:55,191 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 27 nodes and edges [2022-11-22 00:19:55,191 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2022-11-22 00:19:55,192 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-22 00:19:55,246 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/witness.graphml [2022-11-22 00:19:55,246 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-22 00:19:55,247 INFO L158 Benchmark]: Toolchain (without parser) took 95494.53ms. Allocated memory was 182.5MB in the beginning and 461.4MB in the end (delta: 278.9MB). Free memory was 140.3MB in the beginning and 342.4MB in the end (delta: -202.1MB). Peak memory consumption was 77.4MB. Max. memory is 16.1GB. [2022-11-22 00:19:55,247 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 125.8MB. Free memory was 69.9MB in the beginning and 69.8MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 00:19:55,247 INFO L158 Benchmark]: CACSL2BoogieTranslator took 371.40ms. Allocated memory is still 182.5MB. Free memory was 140.3MB in the beginning and 129.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 00:19:55,248 INFO L158 Benchmark]: Boogie Procedure Inliner took 79.39ms. Allocated memory is still 182.5MB. Free memory was 129.8MB in the beginning and 128.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 00:19:55,248 INFO L158 Benchmark]: Boogie Preprocessor took 63.23ms. Allocated memory is still 182.5MB. Free memory was 128.3MB in the beginning and 126.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 00:19:55,248 INFO L158 Benchmark]: RCFGBuilder took 785.60ms. Allocated memory is still 182.5MB. Free memory was 126.7MB in the beginning and 107.8MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-22 00:19:55,249 INFO L158 Benchmark]: TraceAbstraction took 94111.82ms. Allocated memory was 182.5MB in the beginning and 461.4MB in the end (delta: 278.9MB). Free memory was 107.3MB in the beginning and 345.6MB in the end (delta: -238.2MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. [2022-11-22 00:19:55,249 INFO L158 Benchmark]: Witness Printer took 73.60ms. Allocated memory is still 461.4MB. Free memory was 345.6MB in the beginning and 342.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 00:19:55,258 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 125.8MB. Free memory was 69.9MB in the beginning and 69.8MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 371.40ms. Allocated memory is still 182.5MB. Free memory was 140.3MB in the beginning and 129.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 79.39ms. Allocated memory is still 182.5MB. Free memory was 129.8MB in the beginning and 128.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 63.23ms. Allocated memory is still 182.5MB. Free memory was 128.3MB in the beginning and 126.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 785.60ms. Allocated memory is still 182.5MB. Free memory was 126.7MB in the beginning and 107.8MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 94111.82ms. Allocated memory was 182.5MB in the beginning and 461.4MB in the end (delta: 278.9MB). Free memory was 107.3MB in the beginning and 345.6MB in the end (delta: -238.2MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. * Witness Printer took 73.60ms. Allocated memory is still 461.4MB. Free memory was 345.6MB in the beginning and 342.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 94.0s, OverallIterations: 37, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1983 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1983 mSDsluCounter, 1082 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 738 mSDsCounter, 122 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2347 IncrementalHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 122 mSolverCounterUnsat, 344 mSDtfsCounter, 2347 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3437 GetRequests, 2914 SyntacticMatches, 69 SemanticMatches, 454 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 40.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=35, InterpolantAutomatonStates: 227, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 37 MinimizatonAttempts, 108 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 24.7s InterpolantComputationTime, 3391 NumberOfCodeBlocks, 2938 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 4319 ConstructedInterpolants, 0 QuantifiedInterpolants, 48075 SizeOfPredicates, 46 NumberOfNonLiveVariables, 5453 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 74 InterpolantComputations, 20 PerfectInterpolantSequences, 17402/17930 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.6s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 8, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 24, TOOLS_POST_TIME: 0.5s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 24, TOOLS_QUANTIFIERELIM_TIME: 0.5s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 48, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 4, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 8, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME: 0.5s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.5s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 93, DAG_COMPRESSION_RETAINED_NODES: 31, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-22 00:19:55,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede446ac-b896-4275-b74b-004cc5313579/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE